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  • Delivery systems for theranostics in neurodegenerative diseases
    Nano Res. (IF 7.354) Pub Date : 2018-04-20
    Yan Li, Ruiyuan Liu, Weihong Ji, Yanhui Li, Linying Liu, Xin Zhang

    None

    更新日期:2018-04-20
  • Recent progress on printable power supply devices and systems with nanomaterials
    Nano Res. (IF 7.354) Pub Date : 2018-04-20
    Yuanjing Lin, Yuan Gao, Fang Fang, Zhiyong Fan

    None

    更新日期:2018-04-20
  • Ultrafast one-step synthesis of N and Ti 3+ codoped TiO 2 nanosheets via energetic material deflagration
    Nano Res. (IF 7.354) Pub Date : 2018-04-17
    Yousong Liu, Shuxin Ouyang, Wencan Guo, Hehou Zong, Xudong Cui, Zhong Jin, Guangcheng Yang

    An energetic-material (NaN3) deflagration method for preparing N- and Ti3+-codoped TiO2 nanosheets (NT–TiO2) was developed. In this method, N radicals filled the crystal lattice, and Na clusters captured partial O from TiO2. The deflagration process was fast and facile and can be completed within < 1 s after ignition. The obtained NT–TiO2 exhibited rough surfaces with nanopits and nanoholes. The doping concentration can be regulated by controlling the NaN3 addition. The NT–TiO2 samples showed significant enhancements in the visible-light absorption and photoelectric response. The simultaneously produced N radicals and Na clusters from NaN3 deflagration served as N sources and reduction agents, respectively. Additionally, the high deflagration temperature/pressure improved the reactivity of N radicals and Na clusters. Thus, the present NaN3 deflagration method was demonstrated as an ultrafast and effective approach to fabricate NT–TiO2 with a visible-light response. The proposed NaN3 deflagration method allows the ultrafast synthesis of new functional materials via the efficient deflagration of energetic materials.

    更新日期:2018-04-17
  • Ultrahigh energy density battery-type asymmetric supercapacitors: NiMoO 4 nanorod-decorated graphene and graphene/Fe 2 O 3 quantum dots
    Nano Res. (IF 7.354) Pub Date : 2018-04-14
    Jiao Yang, Wei Liu, Hao Niu, Kui Cheng, Ke Ye, Kai Zhu, Guiling Wang, Dianxue Cao, Jun Yan

    None

    更新日期:2018-04-14
  • LiF@SiO 2 nanocapsules for controlled lithium release and osteoarthritis treatment
    Nano Res. (IF 7.354) Pub Date : 2018-04-14
    Trever Todd, Zhenhui Lu, Jinmin Zhao, Benjamin Cline, Weizhong Zhang, Hongmin Chen, Anil Kumar, Wen Jiang, Franklin West, Samuel Franklin, Li Zheng, Jin Xie

    None

    更新日期:2018-04-14
  • 更新日期:2018-04-14
  • Influence of metal support in-plane symmetry on the corrugation of hexagonal boron nitride and graphenemonolayers
    Nano Res. (IF 7.354) Pub Date : 2018-04-14
    Antonio J. Martínez-Galera, José M. Gómez-Rodríguez

    None

    更新日期:2018-04-14
  • Simultaneous formation of trimetallic Pt-Ni-Cu excavated rhombic dodecahedrons with enhanced catalytic performance for the methanol oxidation reaction
    Nano Res. (IF 7.354) Pub Date : 2018-04-14
    Min Tang, Shuiping Luo, Kai Wang, Hongyu Du, Rinrada Sriphathoorat, Peikang Shen

    Multimetallic Pt-based alloys with excavated structures have attracted great interest owing to their compositional and morphological tunability, high specific surface areas, and impressive electro-catalytic activities. Herein, we report the first facile one-pot synthesis of trimetallic Pt-Ni-Cu highly excavated rhombic dodecahedrons (ERDs) with a yield approaching 100%. More importantly, these highly uniform nanocrystals have three-dimensionally accessible excavated surfaces, where abundant stepped atoms are observed. Benefiting from the highly excavated rhombic dodecahedral structures, electronic and synergistic effects within the trimetallic alloy, and abundant stepped atoms, the as-prepared trimetallic Pt-Ni-Cu ERDs exhibit an enhanced electro-catalytic performance for the electro-oxidation of methanol compared to commercial Pt/C and bimetallic Pt-Cu ERDs and Pt-Ni-Cu solid rhombic dodecahedrons solid rhombic dodecahedrons (SRDs).

    更新日期:2018-04-14
  • Plasmon-enhanced ZnO whispering-gallery mode lasing
    Nano Res. (IF 7.354) Pub Date : 2018-04-14
    Chunxiang Xu, Feifei Qin, Qiuxiang Zhu, Junfeng Lu, Yueyue Wang, Jitao Li, Yi Lin, Qiannan Cui, Zengliang Shi, Arumugam Gowri Manohari

    Collaborative enhancements from surface plasmons (SPs) and whispering-gallery modes (WGMs) can induce intense near-field effects with high spatial localization around the surface of a semiconducting material. One can construct a highly efficient hybrid microcavity using semiconducting materials through resonant coupling between SPs and WGMs. Hexagonal ZnO micro-/nanostructures, which have been employed as natural WGM microcavities for ultraviolet (UV) lasing, can be used as ideal platforms to construct such hybrid microcavities. Here, we comprehensively review the recent efforts for improving lasing performance by resonant coupling between SPs and WGMs. Traditional SPs originating from various metals as well as novel SPs originating from atomic layers such as graphene are considered. Moreover, we discuss the mechanism of light-matter interactions beyond the improvements in lasing performance.

    更新日期:2018-04-14
  • Synthesis, characterization, theoretical investigation, and properties of monoclinic-phase InWO 4 hollow nanospheres
    Nano Res. (IF 7.354) Pub Date : 2018-04-11
    Yuping Wang, Di Wang, Ying Xie, Guofeng Wang

    As a newly discovered member of the tungstate family, InWO4 hollow nanospheres with a monoclinic wolframite structure were synthesized successfully. The crystal phase of InWO4 was investigated via a combination of CASTEP geometric optimization and experimental simulation. InWO4 has a space group of P2/c with two InWO4 formula units per unit cell. The optimized cell dimensions are a = 5.16 Å, b = 5.97 Å, and c = 5.23 Å, with α = 90°, β = 92.11°, γ = 90°, giving a unit cell volume of 161.10 Å3, which is consistent with the experimental measurements. More importantly, InWO4 was a promising host material for different Ln3+ (Ln = Eu and Yb/Er) ions. For InWO4:Yb3+/Er3+ excited at 980 nm, transitions from the 4G11/2 (384 nm), 2H9/2 (411 nm), and 4F7/2 (487 nm) levels to the ground state (4I15/2) of Er3+ were observed. In addition to the aforementioned properties, the InWO4 hollow nanospheres can be used to improve the performance of dye-sensitized solar cells, which is chiefly attributed to theirlight scattering.

    更新日期:2018-04-12
  • Recent advances in controlled modification of the size and morphology of metal-organic frameworks
    Nano Res. (IF 7.354) Pub Date : 2018-04-11
    Botao Liu, Kowsalya Vellingiri, Sang-Hee Jo, Pawan Kumar, Yong Sik Ok, Ki-Hyun Kim

    Advances in metal-organic frameworks (MOFs) resulted in significant contributions to diverse applications such as carbon capture, gas storage, heat transformation and separation along with emerging applications toward catalysis, medical imaging, drug delivery, and sensing. The unique in situ and ex situ structural features of MOFs can be tailored by conceptual selection of the organic (e.g.,ligand) and inorganic (e.g., metal) components. Here, we provide a comprehensive review on the synthesis and characterization of MOFs, particularly with respect to controlling their size and morphology. A better understanding of the specific size and morphological parameters of MOFs will help initiate a new era for their real-world applications. Most importantly, this assessment will help develop novel synthesis methods for MOFs and their hybrid/porous materials counterparts with considerably improved properties in targeted applications.

    更新日期:2018-04-11
  • Solution-processed highly adhesive graphene coatings for corrosion inhibition of metals
    Nano Res. (IF 7.354) Pub Date : 2018-04-03
    Gi-Cheol Son, Deuk-Kyu Hwang, Jaewon Jang, Sang-Soo Chee, Kyusang Cho, Jae-Min Myoung, Moon-Ho Ham

    None

    更新日期:2018-04-10
  • In-situ liquid-cell TEM study of radial flow-guided motion of octahedral Au nanoparticles and nanoparticle clusters
    Nano Res. (IF 7.354) Pub Date : 2018-04-05
    Chang Li, Xin Chen, Haiyang Liu, Jiali Fang, Xiaoqin Zhou

    The dynamic behavior of octahedral gold nanoparticles (NPs) and nanoparticle clusters (NPCs) in aqueous solution is studied by in-situ liquid-cell transmission electron microscopy (TEM). The octahedral Au NPs/NPCs show preferential orientations in the liquid cell, due to the interaction with the SiN x window. The Au NPs show long-range reversible hopping and three-dimensional (3D) rotational motions in the liquid environment. At the same time, the Au NPCs and NPs perform slow stick-slip and stick-roll motions, respectively, with a centripetal trend. The centripetal motions were explained by a liquid evaporation-induced radial flow model, in which the NPCs/NPs trajectories are controlled by Stokes forces and surface friction by the silicon nitride window. The calculated radius-dependent force (F c ) on the NPCs/NPs shows a semi-linear correlation with the distance r between the NPCs/NPs and the center of mass, accompanied with stochastic fluctuations, in agreement with the model predictions. This work thus demonstrates the effectiveness of in situ liquid-cell TEM for the in-depth understanding of complicated liquid flow and force interactions in nanomaterials.

    更新日期:2018-04-05
  • Growth of atomically thick transition metal sulfide filmson graphene/6 H -SiC(0001) by molecular beam epitaxy
    Nano Res. (IF 7.354) Pub Date : 2018-04-05
    Haicheng Lin, Wantong Huang, Kun Zhao, Chaosheng Lian, Wenhui Duan, Xi Chen, Shuai-Hua Ji

    None

    更新日期:2018-04-05
  • Sub-nm ruthenium cluster as an efficient and robust catalyst for decomposition and synthesis of ammonia: Break the “size shackles”
    Nano Res. (IF 7.354) Pub Date : 2018-04-04
    Jinpeng Li, Weiyang Wang, Wenxing Chen, Qinmei Gong, Jun Luo, Ruoqian Lin, Huolin Xin, Hui Zhang, Dingsheng Wang, Qing Peng, Wei Zhu, Chen Chen, Yadong Li

    Downsizing to sub-nm is a general strategy to reduce the cost of catalysts. However, theoretical Wulff-constructed model suggests that sub-nm clusters show little activity for various reactions such as ammonia decomposition and ammonia synthesis because of the lack of active sites. As clusters may deviate from the ideal model construction under reaction conditions, a host–guest strategy to synthesize thermally stable 1.0 nm monodispersed Ru clusters by the pyrolysis of MIL-101 hosts is reported here to verify the hypothesis. For ammonia decomposition, the activity of the Ru clusters is 25 times higher than that of commercial Ru/active carbon (AC) at full-conversion temperature, while for ammonia synthesis, the activity of the Ru clusters is 500 times as high as that of promoted Ru NPs counterpart. The catalyst also maintains its activities for 40 h without any increase in the size. This model can be used to develop a host–guest strategy for designing thermally stable sub-nm clusters to atomic–efficiently catalyze reactions.

    更新日期:2018-04-04
  • Polarization effect in tip-enhanced infrared nanospectroscopy studies of the selective Y5 receptor antagonistLu AA33810
    Nano Res. (IF 7.354) Pub Date : 2018-04-04
    Natalia Piergies, Ewa Pięta, Czesława Paluszkiewicz, Helena Domin, Wojciech M. Kwiatek

    A novel approach of combining conventional infrared spectroscopy (IR) and atomic force microscopy (AFM) is presented to better understand the behavior of a drug adsorbed on a metal substrate at the nanoscale level. Tip-enhanced infrared nanospectroscopy (TEIRA) was used for the first time to investigate Lu AA33810, a selective brain-penetrating Y5 receptor antagonist, after immobilization on gold nanoparticles (GNPs). Here, a gold coated AFM tip and gold substrate were used to obtain the near-field electromagnetic field trapping effect. Because of the huge signal enhancement, it was possible to obtain the spectral information regarding the self-assembled monolayer of the investigated molecule. The effect of two orthogonal polarizations (p- and s-polarization modulations) of the excitation laser beam on the spectral patterns is also discussed. The results show that there is a strong relationship between the state of polarization of the incident radiation and the relative infrared band intensities. Another factor affecting the observed spectral differences is the topology of the metal substrate, which may result in the induction of a cross-polarization effect. The performed analysis indicates that the C–C bond from the cyclohexyl group is oriented almost parallel to the metal surface. Conversely, the p- and s-polarized spectral variations suggest that the O=S=O angle is high enough to enable the simultaneous interaction of both oxygen atoms with the GNPs.

    更新日期:2018-04-04
  • Highly bonded T -Nb 2 O 5 /rGO nanohybrids for 4 V quasi-solid state asymmetric supercapacitors with improved electrochemical performance
    Nano Res. (IF 7.354) Pub Date : 2018-04-04
    Yuzhi Jiao, Haitao Zhang, Hailang Zhang, Ao Liu, Yanxia Liu, Suojiang Zhang

    T-Nb2O5/reduced graphene oxide nanohybrids were fabricated via the hydrothermal attachment of Nb2O5 nanowires to dispersed graphene oxide nanosheets followed by a high-temperature phase transformation. Electrochemical measurements showed that the nanohybrid anodes possessed enhanced reversible capacity and superior cycling stability compared to those of a pristine T-Nb2O5 nanowire electrode. Owing to the strong bonds between graphene nanosheets and T-Nb2O5 nanowires,the nanohybrids achieved an initial capacity of 227 mAh·g−1. Additionally, non-aqueous asymmetric supercapacitors (ASCs) were fabricated with the synthesized nanohybrids as the anode and activated carbon as the cathode. The 3 V Li-ion ASC with a LiPF6-based organic electrolyte achieved an energy density of 45.1 Wh·kg−1 at 715.2 W·kg−1. The working potential could be further enhanced to 4 V when a polymer ionogel separator (PVDF-HFP/LiTFSI/EMIMBF4) and formulated ionic liquid electrolyte were employed. Such a quasi-solid state ASC could operate at 60 °C and delivered a maximum energy density of 70 Wh·kg−1 at 1 kW·kg−1.

    更新日期:2018-04-04
  • Large-area and highly uniform carbon nanotube film for high-performance thin film transistors
    Nano Res. (IF 7.354) Pub Date : 2018-04-04
    Guodong Dong, Jie Zhao, Lijun Shen, Jiye Xia, Hu Meng, Wenhuan Yu, Qi Huang, Hua Han, Xuelei Liang, Lianmao Peng

    Carbon nanotube thin film transistors (CNT-TFTs) are a potential TFT technology for future high-performance macroelectronics. Practical application of CNT-TFTs requires the production of large-area, highly uniform, density-controllable, repeatable, and high-throughput CNT thin films. In this study, CNT films were fabricated on 4-inch Si wafers and 2.5th generation (G2.5) backplane glasses (370 mm × 470 mm) by dip coating using a chloroform-dispersed high-purity semiconducting CNT solution. The CNT density was controlled by the solution concentration and coating times, but was almost independent of the substrate lifting speed (1–450 mm·min−1), which enables high-throughput CNT thin film production. We developed an image processing software to efficiently characterize the density and uniformity of the large-area CNT films. Using the software, we confirmed that the CNT films are highly uniform with coefficients of variance (CV) < 10% on 4-inch Si wafers and ∼ 13.8% on G2.5 backplane glasses. High-performance CNT-TFTs with a mobility of 45–55 cm2·V−1·s−1 were obtained using the fabricated CNT films with a high-performance uniformity (CV ≈ 11%–13%) on a 4-inch wafer. To our knowledge, this is the first fabrication and detailed characterization of such large-area, high-purity, semiconducting CNT films for TFT applications, which is a significant step toward manufacturing CNT-TFTs.

    更新日期:2018-04-04
  • Facile synthesis based on novel carbon-supported cyanogel of structurally ordered Pd 3 Fe/C as electrocatalyst for formic acid oxidation
    Nano Res. (IF 7.354) Pub Date : 2018-04-04
    Zhenyuan Liu, Gengtao Fu, Jiahui Li, Zhenqi Liu, Lin Xu, Dongmei Sun, Yawen Tang

    A novel carbon-supported cyanogel (C@cyanogel)-derived strategy is used to synthesize an intermetallic Pd3Fe/C compound of the desired ordered Pd3Fe phase with a small particle size. The novelty of this work lies in using carbon-supported K2PdIICl4/K4FeII(CN)6 cyanogel as a reaction precursor, generated through the substitution of two chloride ligands by the nitrogen ends of the cyanide ligands on the metal center. The inherent nature of cyanogels can effectively suppress the movement of Pd0 and Fe0 nuclei in the crystal, benefiting the formation of the intermetallic, which is otherwise challenging via traditional synthesis techniques. The ordered Pd3Fe/C catalyst exhibits excellent catalytic activity and good cycle stability for the formic acid oxidation (FAO) reaction relative to the properties of disordered Pd3Fe/C and commercial Pd/C catalysts, demonstrating that the ordered Pd3Fe/C is a promising replacement for commercial Pd-based catalysts. The outstanding performance can be ascribed to the full isolation of active sites in the ordered Pd3Fe structure and the modified electronic structure of the active components. This work provides an effective and novel route to obtain Pd-based intermetallic compounds with potential applications in a wide range of electrocatalysis.

    更新日期:2018-04-04
  • A networked swellable dextrin nanogels loading Bcl2 siRNA for melanoma tumor therapy
    Nano Res. (IF 7.354) Pub Date : 2018-04-03
    Huipeng Li, Zhanwei Zhou, Feiran Zhang, Yuxin Guo, Xue Yang, Hulin Jiang, Fei Tan, David Oupicky, Minjie Sun

    None

    更新日期:2018-04-03
  • Real-time decay of fluorinated fullerene molecules on Cu(001) surface controlled by initial coverage
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Andrey I. Oreshkin, Dmitry A. Muzychenko, Sergey I. Oreshkin, Vladimir A. Yakovlev, Palanichamy Murugan, S. Selva Chandrasekaran, Vijay Kumar, Rauf Z. Bakhtizin

    In this study, the evolution of C60F18 molecules on a Cu(001) surface was studied by means of scanning tunneling microscopy and density functional theory calculations. The results showed that fluorinated fullerenes (tortoise-shaped polar C60F18) decay on Cu(001) surfaces by a step-by-step detachment of F atoms from the C60 cage. The most favorable adsorption configuration was realized when the F atoms of C60F18 pointed towards the Cu surface and six F atoms were detached from it. The results also showed that a further decay of C60F12 molecules strongly depended on the initial C60F18 coverage. The detached F atoms initially formed a two-dimensional (2D) gas phase which then slowly transformed into F-induced surface structures. The degree of contact between the C60F12 molecules and the Cu(001) surface depended on the density of the 2D gas phase. Hence, the life-time of fluorinated fullerenes was determined by the density of the 2D gas phase, which was affected by the formation of new F-induced structures and the decay of C60F12 molecules.

    更新日期:2018-03-19
  • Promoting the methanol oxidation catalytic activity by introducing surface nickel on platinum nanoparticles
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Siqi Lu, Huiming Li, Jingyao Sun, Zhongbin Zhuang

    High performance methanol oxidation reaction (MOR) catalysts are critical to the performance of attractive, direct methanol fuel cells. Here, we use surface controlled PtNi alloy nanoparticles as model catalysts to study the MOR mechanism and give further guidance to the design of new high performance MOR catalysts. The enhanced MOR activity of PtNi alloy was mainly attributed to the enhanced OH adsorption owing to surface Ni sites. This suggests that the MOR undergoes the Langmuir–Hinshelwood mechanism, whereby adsorbed CO is removed with the assistance of adsorbed OH. Within the PtNi catalyst, Pt provides methanol adsorption sites (in which methanol is converted to adsorbed CO) and Ni provides OH adsorption sites. The optimized Pt–Ni ratio for MOR was found to be 1:1. This suggests that bifunctional catalysts with both CO and OH adsorption sites can lead to highly active MOR catalysts.

    更新日期:2018-03-19
  • Ion separation and water purification by applying external electric field on porous graphene membrane
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Amir Lohrasebi, Samaneh Rikhtehgaran

    Using molecular dynamics (MD) simulations, a porous graphene membrane was exposed to external electric fields to separate positive and negative ions from salt-water and to produce fresh water. It was observed that, by increasing the strength of the applied electric field, ion separation improved noticeably. In addition, to obtain fresh water, the designed system included two graphene membranes, which are exposed to two external electric fields in opposite directions. Ion rejection was found to be greater than 93% for the electric field of 10 mV/Å and higher. This atomic-level simulation increases the understanding of electric field effects on desalination using multilayer graphene membranes and can be helpful in designing more efficient membranes.

    更新日期:2018-03-19
  • Light-powered direction-controlled micropump
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Mingtong Li, Yajun Su, Hui Zhang, Bin Dong

    A micropump induces the flow of its surrounding fluids and is extremely promising in a variety of applications such as chemical sensing or mass transportation. However, it is still challenging to manipulate its pumping direction. In this study, we examine a binary micropump based on perovskite and poly[(2-methoxy-5-ethylhexyloxy)-1,4-phenylenevinylene] (MEHPPV). The micropump is operational under the influence of light. Light exhibits significant versatility in controlling the pumping phenomenon of the micropump. It governs the start and stop and also regulates the velocity and directions. The direction control signifies immense opportunities for the development of micropumps with unprecedented pumping behaviors and functions (such as heartbeat-like pumping, rectification, and amplification). This makes them potentially useful in various fields. Hence, it is expected that the micropump reported in the current study could act as a key step towards the further development of more sophisticated micropumps for diverse applications.

    更新日期:2018-03-19
  • Electrical contacts in monolayer blue phosphorene devices
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Jingzhen Li, Xiaotian Sun, Chengyong Xu, Xiuying Zhang, Yuanyuan Pan, Meng Ye, Zhigang Song, Ruge Quhe, Yangyang Wang, Han Zhang, Ying Guo, Jinbo Yang, Feng Pan, Jing Lu

    Semiconducting monolayer (ML) blue phosphorene (BlueP) shares similar stability with ML black phosphorene (BP), and it has recently been grown on an Au surface. Potential ML BlueP devices often require direct contact with metal to enable the injection of carriers. Using ab initio electronic structure calculations and quantum transport simulations, for the first time, we perform a systematic study of the interfacial properties of ML BlueP in contact with metals spanning a wide work function range in a field effect transistor (FET) configuration. ML BlueP has undergone metallization owing to strong interaction with five metals. There is a strong Fermi level pinning (FLP) in the ML BlueP FETs due to the metal-induced gap states (MIGS) with a pinning factor of 0.42. ML BlueP forms n-type Schottky contact with Sc, Ag, and Pt electrodes with electron Schottky barrier heights (SBHs) of 0.22, 0.22, and 0.80 eV, respectively, and p-type Schottky contact with Au and Pd electrodes with hole SBHs of 0.61 and 0.79 eV, respectively. The MIGS are eliminated by inserting graphene between ML BlueP and the metal electrode, accompanied by a transition from a strong FLP to a weak FLP. Our study not only provides insight into the ML BlueP–metal interfaces, but also helps in the design of ML BlueP devices.

    更新日期:2018-03-19
  • Selective toxicity of hydroxyl-rich carbon nanodots for cancer research
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Tak H. Kim, Joseph P. Sirdaarta, Qian Zhang, Ehsan Eftekhari, James St. John, Derek Kennedy, Ian E. Cock, Qin Li

    The toxicity of nanoparticles in a biological system is an integration of effects arising from surface functionality, particle size, ionic dissolution, etc. This complexity suggests that generalization of a material’s toxicity may be inappropriate. Moreover, from a medicinal point of view, toxicity can be used for treatment of malignant cells, such as cancer. In this study, highly biocompatible carbon nanodots (gCDs) were synthesized by reacting citric acid and urea in glycerol, which resulted in abundant hydroxyl functional groups on the particle surface. gCDs show excitation-dependent photoluminescence but with bright green to yellow emission. Importantly, a series of toxicity assessments showed that as-synthesized gCDs possessed exceptional biocompatibilities to various biological entities including 18 bacteria species, Petunia axillaris seedlings, and Artemia franciscana nauplii. Furthermore, the particles were shown to have low to no toxic effects on human embryonic kidney (HEK-293), breast (MCF-7), and oral squamous (CAL-27) carcinoma cell lines. Of particular interest, the gCDs displayed antiproliferative activities against ovarian choriocarcinoma cells (JAr/Jeg-3 cell lines), which may be further explored for cancer drug discovery.

    更新日期:2018-03-19
  • Copper nanowire-TiO 2 -polyacrylate composite electrodes with high conductivity and smoothness for flexible polymer solar cells
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Haitao Zhai, Yang Li, Liwei Chen, Xiao Wang, Liangjing Shi, Ranran Wang, Jing Sun

    Copper nanowire (Cu NW) transparent electrodes have attracted considerable attention due to their outstanding electrical properties, flexibility and low cost. However, complicated post-treatment techniques are needed to obtain good electrical conductivity, because of the organic residues and oxide layers on the surface of the Cu NWs. In addition, commonly used methods such as thermal annealing and acid treatment often lead to nanowire damage. Herein, a TiO2 sol treatment was introduced to obtain Cu NW transparent electrodes with superb performance (13 Ω/sq @ 82% T) at room temperature within one minute. Polymer solar cells with excellent flexibility were then fabricated on the copper nanowire-TiO2-polyacrylate composite electrode. The power conversion efficiency (PCE) of the cells based on a blend of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PC61BM) reached 3.11%, which was better than the control devices that used indium tin oxide (ITO)-PET electrodes, and outperforms other Cu NW based organic solar cells previously reported. The PCE of the solar cells based on Cu NW electrodes remained at 90% after 500 cycles of bending, while the PET/ITO solar cells failed after 20 and 200 cycles, with sheet resistance of 35 and 15 Ω/sq, respectively.

    更新日期:2018-03-19
  • 更新日期:2018-03-19
  • MoS 2 /MnO 2 heterostructured nanodevices for electrochemical energy storage
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Xiaobin Liao, Yunlong Zhao, Junhui Wang, Wei Yang, Lin Xu, Xiaocong Tian, Yi Shuang, Kwadwo Asare Owusu, Mengyu Yan, Liqiang Mai

    Hybrid or composite heterostructured electrode materials have been widely studied for their potential application in electrochemical energy storage. Whereas their physical or chemical properties could be affected significantly by modulating the heterogeneous interface, the underlying mechanisms are not yet fully understood. In this work, we fabricated an electrochemical energy storage device with a MoS2 nanosheet/MnO2 nanowire heterostructure and designed two charge/discharge channels to study the effect of the heterogeneous interface on the energy storage performances. Electrochemical measurements show that a capacity improvement of over 50% is achieved when the metal current collector was in contact with the MnO2 instead of the MoS2 side. We propose that this enhancement is due to the unidirectional conductivity of the MoS2/MnO2 heterogeneous interface, resulting from the unimpeded electrical transport in the MnO2-MoS2 channel along with the blocking effect on the electron transport in the MoS2-MnO2 channel, which leads to reaction kinetics optimization. The present study thus provides important insights that will improve our understanding of heterostructured electrode materials for electrochemical energy storage.

    更新日期:2018-03-19
  • Nontoxic engineered virus nanofibers as an efficient agent for the prevention and detection of fungal infection
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Yicun Wang, Hongxi Shi, Shuai Dong, Yan Li, Meng Wang, Yanyan Huai, Xintong Zhang, Xi Chen, Chuanbin Mao, Xiang Gao, Li Wang

    Candida albicans (C. albicans) infection has a high mortality rate in immunocompromised patients. Owing to the inefficiency of the current diagnostic system and the absence of licensed vaccines against candidiasis, the prevention of C. albicans infection remains a challenge. C. albicans infection can be evaluated and prevented by the anti-secreted aspartyl proteinase 2 antibody (anti-Sap2 IgG) and Hsp90 antibody (anti-Hsp90 IgG). In this study, to explore a new agent for the improvement of the diagnosis and the prevention of C. albicans infection, an engineered fd bacteriophage, which is considered a human-safe virus nanofiber, was designed and prepared with two epitopes that could induce and capture anti-Sap2 IgG and anti-Hsp90 IgG. The dual-display phage was employed as a novel capture probe to develop a new enzyme-linked immunosorbent assay (ELISA) method, which significantly improved the detection rate compared with those of the ELISA in which recombinant protein Sap2 was used as coating antigen to capture the specific antibodies (rSap2-ELISA) and the ELISA in which recombinant protein Hsp90 was used as coating antigen to capture the specific antibodies (rHsp90-ELISA). In addition, the nanofibers acted as a potential vaccine to immunize mice, as well as recombinant proteins, more efficiently mediated humoral and cellular immune responses, decreased levels of C. albicans colonization, and increased the survival rates in C. albicans-infected mice. Therefore, the phage dual-display nanofiber has been shown to be a powerful bifunctional agent for protection against and sensitive detection of clinical infections, which has the potential to be widely used in the life sciences, clinical medicine, and environmental sciences.

    更新日期:2018-03-19
  • Oxygen-assisted preparation of mechanoluminescent ZnS:Mn for dynamic pressure mapping
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Xiandi Wang, Rui Ling, Yufei Zhang, Miaoling Que, Yiyao Peng, Caofeng Pan

    Mechanoluminescent materials that convert mechanical stimuli to light emission have attracted extensive attention for potential applications in human-machine interactions. Here, we report a simple and available novel approach for the oxygen-assisted preparation of ZnS:Mn particles by solid-state reaction at atmospheric pressure without the formation of the corresponding oxides. The existence of O2 has a positive impact on the formation of S vacancies in wurtzite-phase ZnS, leading to the introduction of Mn2+ ion luminescent centers and shallow donor levels, which can improve the electron-hole recombination rate. The O2 ratio and Mn2+ ion doping concentration have significant effects on the luminous efficiency, which is optimal at 1%–20% and 1 at.%–2 at.% respectively. In addition, a device based on the piezo-photonic effect with excellent pressure sensitivity of 0.032 MPa−1 was fabricated, which can map the two-dimensional pressure distribution ranging from 2.2 to 40.6 MPa in situ. This device can be applied to real-time pressure mapping, smart sensor networks, high-level security systems, human-machine interfaces, and artificial skins.

    更新日期:2018-03-19
  • Chemokine-mimetic plerixafor derivative for tumor-specific delivery of nanomaterials
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Seungbeom Ko, Gayong Shim, Jinyoung Kim, Yu-Kyoung Oh

    Here, we report that chemokine-mimetic plerixafor derivatives could govern tumor-specific delivery and functional effects of nanomaterials. Reduced graphene oxide (rGO) nanosheets were used as a model functional nanomaterial, and plerixafor-conjugated lipid (PL/rGO) or a benzylcyclam derivative of plerixafor-conjugated lipid (BPL/rGO) was physically adsorbed onto the surface of rGO. The cellular uptake of surface-modified rGO was dependent on overexpression of the CXCR4 chemokine receptor on cancer cells. In KB cells, the binding affinity of BPL/rGO for CXCR4 was 6.8-fold greater than that of PL/rGO. Notably, cellular uptake patterns correlated with in vitro photothermal anticancer efficacy. The tumor distribution of BPL/rGO was higher than that of PL/rGO and plain rGO in mice bearing CXCR4-overexpressing tumors, whereas the distribution of the various rGO forms was similar in mice harboring CXCR4-negative tumors. Moreover, complete photothermal tumor ablation was observed in BPL/rGO-treated mice bearing CXCR4-positive KB cell tumors, but not in CXCR4-negative MCF-7 cell tumors. These results provide evidence that BPL can be used to enhance the delivery of nanomaterials to CXCR4-overexpressing tumors. Chemokine-mimetic BPL can be further applied for nanomaterial-based delivery of photosensitizers, anticancer drugs, or diagnostic tumor imaging agents in CXCR4-overexpressing cancer patients.

    更新日期:2018-03-19
  • Ultrathin nanobelts-assembled Chinese knot-like 3D TiO 2 for fast and stable lithium storage
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Qili Wu, Shiman He, Xianfeng Yang, Jingling Yang, Gaoren Li, Yuying Meng, Shengfu Tong, Liqiang Mai, Mingmei Wu

    Nanostructured TiO2 has applications in solar cells, photocatalysts, and fast-charging, safe lithium ion batteries (LIBs). To meet the demand of high-capacity and high-rate LIBs with TiO2-based anodes, it is important to fine-tune the nanoarchitecture using a well-controlled synthesis approach. Herein, we report a new approach that involves epitaxial growth combined with topotactic conversion to synthesize a unique type of 3D TiO2 nanoarchitecture that is assembled by well-oriented ultrathin nanobelts. The whole nanoarchitecture displays a 3D Chinese knot-like morphology; the core consists of robust perpendicular interwoven nanobelts and the shell is made of extended nanobelts. The nanobelts oriented in three perpendicular [001]A directions facilitate Li+ penetration and diffusion. Abundant anatase/TiO2-B interfaces provide a large amount of interfacial pseudocapacitance. A high and stable capacity of 130 mA·h·g−1 was obtained after 3,000 cycles at 10 A·g−1 (50 C), and the high-rate property of our material was greater than that of many recently reported high-rate TiO2 anodes. Our result provides, not only a novel synthesis strategy, but also a new type of 3D anatase TiO2 anode that may be useful in developing long-lasting and fast-charging batteries.

    更新日期:2018-03-19
  • Dual-mode emission of single-layered graphene quantum dots in confined nanospace: Anti-counterfeiting and sensor applications
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Liqian Bai, Ning Xue, Yufei Zhao, Xinrui Wang, Chao Lu, Wenying Shi

    Engineering of the luminescent properties for graphene quantum dots (GQDs) presents two enormous challenges: 1) The bandgap of GQDs is mainly determined by structural defects (size, shape, and the fraction of sp2 and sp3 domains), which results in non-stoichiometric nature; 2) the preparation methods limit the achievement of an accurate chemical structure of GQDs, leading to many controversial explanations over the relationship between the structural defects and bandgaps. Here, single-layered GQDs with an exact structure are obtained by in-situ reaction of intercalated precursors in the confined nanospace of layered double hydroxides (LDHs). Subsequently, the structure-property relationship is uncovered, demonstrating the enhanced fluorescence and activated room temperature phosphorescence of the as-prepared GQDs-LDHs, which originate from synergistic effects: 1) strong confinement provided by the nanospace of LDHs; 2) rich O-containing functional groups on the surface of GQDs resulting from LDH catalysis. Moreover, the colorless nature and dual-emission characteristics of GQDs-LDHs satisfy the preconditions as anti-counterfeiting markers for protecting valuable documents (bank notes, commercial invoices, etc.). Particularly, owing to the low toxicity of GQDs and the edible property of LDHs, the GQDs-LDHs/gelatin capsules could be the new generation of potential green anti-counterfeiting material in the field of food and drugs.

    更新日期:2018-03-19
  • In situ trapped high-density single metal atoms within graphene: Iron-containing hybrids as representatives for efficient oxygen reduction
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Daobin Liu, Chuanqiang Wu, Shuangming Chen, Shiqing Ding, Yaofeng Xie, Changda Wang, Tao Wang, Yasir A. Haleem, Zia ur Rehman, Yuan Sang, Qin Liu, Xusheng Zheng, Yu Wang, Binghui Ge, Hangxun Xu, Li Song

    Atomically dispersed catalysts have attracted attention in energy conversion applications because their efficiency and chemoselectivity for special catalysis are superior to those of traditional catalysts. However, they have limitations owing to the extremely low metal-loading content on supports, difficulty in the precise control of the metal location and amount as well as low stability at high temperatures. We prepared a highly doped single metal atom hybrid via a single-step thermal pyrolysis of glucose, dicyandiamide, and inorganic metal salts. High-angle annular dark field-scanning transmission electron microscopy (HAADF-STEM) and X-ray absorption fine structure spectroscopy (XAFS) revealed that nitrogen atoms doped into the graphene matrix were pivotal for metal atom stabilization by generating a metal-Nx coordination structure. Due to the strong anchoring effect of the graphene matrix, the metal loading content was over 4 wt.% in the isolated atomic hybrid (the Pt content was as high as 9.26 wt.% in the Pt-doped hybrid). Furthermore, the single iron-doped hybrid (Fe@N-doped graphene) showed a remarkable electrocatalytic performance for the oxygen reduction reaction. The peak power density was ∼199 mW·cm−2 at a current density of 310 mA·cm−2 and superior to that of a commercial Pt/C catalyst when it was used as a cathode catalyst in assembled zinc-air batteries. This work offered a feasible approach to design and fabricate highly doped single metal atoms (SMAs) catalysts for potential energy applications.

    更新日期:2018-03-19
  • A low-cost, printable, and stretchable strain sensor based on highly conductive elastic composites with tunable sensitivity for human motion monitoring
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Yougen Hu, Tao Zhao, Pengli Zhu, Yuan Zhang, Xianwen Liang, Rong Sun, Ching-Ping Wong

    Strain sensors with high stretchability, broad strain range, high sensitivity, and good reliability are desirable, owing to their promising applications in electronic skins and human motion monitoring systems. In this paper, we report a high-performance strain sensor based on printable and stretchable electrically conductive elastic composites. This strain sensor is fabricated by mixing silver-coated polystyrene spheres (PS@Ag) and liquid polydimethylsiloxane (PDMS) and screen-printed to a desirable geometry. The strain sensor exhibits fascinating comprehensive performances, including high electrical conductivity (1.65 × 104 S/m), large workable strain range (> 80%), high sensitivity (gauge factor of 17.5 in strain of 0%–10%, 6.0 in strain of 10%–60% and 78.6 in strain of 60%–80%), inconspicuous resistance overshoot (< 15%), good reproducibility and excellent long-term stability (1,750 h at 85 °C/85% relative humidity) for PS@Ag/PDMS-60, which only contains ∼ 36.7 wt.% of silver. Simultaneously, this strain sensor provides the advantages of low-cost, simple, and large-area scalable fabrication, as well as robust mechanical properties and versatility in applications. Based on these performance characteristics, its applications in flexible printed electrodes and monitoring vigorous human motions are demonstrated, revealing its tremendous potential for applications in flexible and wearable electronics.

    更新日期:2018-03-19
  • Flow behavior of liquid metal in the connected fascial space: Intervaginal space injection in the rat wrist and mice with tumor
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Nan Hu, Yupeng Cao, Zhuo Ao, Xinxiao Han, Qiang Zhang, Wentao Liu, Sidi Liu, Fulong Liao, Dong Han

    The fascia and the fascial space can help provide a better understanding of the body. An intervaginal space injection (ISI) provides unique advantages that require further investigation. An upper limb model including physiological conditions and the tumor process was chosen to determine the flow behavior of liquid metal after ISI. In normal rats, after the injection of liquid metal into the intervaginal space comprising tendons, vessels, and nerves, magnetic resonance imaging and an anatomy experiment indicated that the liquid metal wrapped around the fascial space and finally reached the fingertip downstream and the armpit upstream in addition to the neurovascular bundle without vessels or lymph nodes. Using environmental scanning electron microscopy (ESEM) images, we discovered that the liquid metal was wrapped around the fibers of the fascia and moved forward in microscale or nanoscale areas. These data confirmed a fascia-based pathway. In tumors, the liquid metal moved to the tumor capsule through the damaged spot, where cancer cells destroy the integrity of the fascia between the normal cells and cancer cells. The liquid metal partly wrapped around the tumor and separated the tumor from the surrounding normal muscle. The ESEM images showed that fibers of the fascia penetrated the tumor, thus forming a network through which the liquid metal penetrated the tumor. Our study illustrated the physiological and pathological flow behavior of liquid metal in the upper limb after ISI and demonstrated a nonvascular pathway in the fascia. ISI may be useful for clinical treatment in the fascial pathway.

    更新日期:2018-03-19
  • Novel dual fluorescence temperature-sensitive chameleon DNA-templated silver nanocluster pair for intracellular thermometry
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Weijun Zhou, Jinbo Zhu, Ye Teng, Baoji Du, Xu Han, Shaojun Dong

    For the first time, we are reporting a novel type of dual fluorescence temperature-sensitive DNA-templated silver nanocluster (AgNC) pair, which contains two pieces of single-stranded AgNC in proximity through hybridization. Both the chameleon AgNC pairs, A-NCP and B-NCP, possess two bright fluorescence peaks that achieve sensitive variations corresponding to temperature change from 15 to 45 °C. With the increase in temperature, one of the fluorescence emissions of A-NCP (A-FL570) increases, while the other (A-FL640) decreases. However, both the emissions of B-NCP (B-FL685 and B-FL620) decrease simultaneously. Therefore, A-NCP shows a remarkable fluorescence color variation from orange to yellow, while the fluorescence color of B-NCP changes from orange to colorless, with increase in temperature. Moreover, the temperature responding linear range of A-NCP can be regulated by adjusting the structures and sequences of assistant DNA templates. It is assumed that the two single-stranded segmental AgNCs are integrated together as they are assembled into AgNC pairs, leading to a dramatic variation in fluorescence properties. The temperature-sensitive phenomenon is due to the dehybridization-induced separation of two pieces of segmental AgNC, caused by temperature increase. The temperature-sensitive AgNC pairs have been successful in indicating the temperature of living cells, showing the potential for a new application of silver nanocluster as a nanothermometer with adjustable response range, bringing novel insight into the regulatory mechanism of AgNC fluorescence variation.

    更新日期:2018-03-19
  • Ag nanowire/nanoparticle-decorated MoS 2 monolayers for surface-enhanced Raman scattering applications
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Juan Li, Weina Zhang, Hongxiang Lei, Baojun Li

    Developing well-defined nanostructures with superior surface-enhanced Raman scattering (SERS) performance is a critical and highly desirable goal for the practical applications of SERS in sensing and analysis. Here, a SERS-active substrate was fabricated by decorating a MoS2 monolayer with Ag nanowire (NW) and nanoparticle (NP) structures, using a spin-coating method. Both experimental and theoretical results indicate that strong SERS signals of rhodamine 6G (R6G) molecules can be achieved at “hotspots” formed in the Ag NW-Ag NP-MoS2 hybrid structure, with an enhancement factor of 106. The SERS enhancement is found to be strongly polarization dependent. The fabricated SERS substrate also exhibits ultrasensitive detection capabilities with a detection limit of 10–11 M, as well as reliable reproducibility and good stability.

    更新日期:2018-03-19
  • One-step synthesis of novel snowflake-like Si-O/Si-C nanostructures on 3D graphene/Cu foam by chemical vapor deposition
    Nano Res. (IF 7.354) Pub Date : 2018-03-19
    Jing Ning, Dong Wang, Jincheng Zhang, Xin Feng, Ruixia Zhong, Jiabo Chen, Jianguo Dong, Lixin Guo, Yue Hao

    The recent development of synthesis processes for three-dimensional (3D) graphene-based structures has tended to focus on continuous improvement of porous nanostructures, doping modification during thin-film fabrication, and mechanisms for building 3D architectures. Here, we synthesized novel snowflake-like Si-O/Si-C nanostructures on 3D graphene/Cu foam by one-step low-pressure chemical vapor deposition (CVD). Through systematic micromorphological characterization, it was determined that the formation mechanism of the nanostructures involved the melting of the Cu foam surface and the subsequent condensation of the resulting vapor, 3D growth of graphene through catalysis in the presence of Cu, and finally, nucleation of the Si-O/Si-C nanostructure in the carbon-rich atmosphere. Thus, by tuning the growth temperature and duration, it should be possible to control the nucleation and evolution of such snowflake-like nanostructures with precision. Electrochemical measurements indicated that the snowflake-like nanostructures showed excellent performance as a material for energy storage. The highest specific capacitance of the Si-O/Si-C nanostructures was ∼963.2 mF/cm2 at a scan rate of 1 mV/s. Further, even after 20,000 sequential cycles, the electrode retained 94.4% of its capacitance.

    更新日期:2018-03-19
  • Enabling silicon photoanodes for efficient solar water splitting by electroless-deposited nickel
    Nano Res. (IF 7.354) Pub Date : 2018-03-16
    Jiheng Zhao, Thomas Mark Gill, Xiaolin Zheng

    None

    更新日期:2018-03-16
  • A novel tumor-targeting treatment strategy uses energy restriction via co-delivery of albendazole and nanosilver
    Nano Res. (IF 7.354) Pub Date : 2018-03-16
    Jianming Liang, Ruixiang Li, Yuwei He, Chengli Ling, Qi Wang, Yongzhuo Huang, Jing Qin, Weigen Lu, Jianxin Wang

    None

    更新日期:2018-03-16
  • A chemophotothermal and targeting multifunctional nanoprobe with a tumor-diagnosing ability
    Nano Res. (IF 7.354) Pub Date : 2018-03-16
    Niannian Li, Jiejun Cheng, Ying Zhang, Jie Wang, Gang Huang, Jun Zhu, Dannong He

    None

    更新日期:2018-03-16
  • A strategy for highly dispersed Mo 2 C/MoN hybrid nitrogen-doped graphene via ion-exchange resin synthesis for efficient electrocatalytic hydrogen reduction
    Nano Res. (IF 7.354) Pub Date : 2018-03-16
    Jiabo Wang, Weilin Chen, Ting Wang, Nasen Bate, Chunlei Wang, Enbo Wang

    None

    更新日期:2018-03-16
  • Emergence of photoluminescence on bulk MoS 2 by laser thinning and gold particle decoration
    Nano Res. (IF 7.354) Pub Date : 2018-03-16
    Lili Gong, Qi Zhang, Liangjun Wang, Jianfeng Wu, Cheng Han, Bo Lei, Wei Chen, Goki Eda, Kuan Eng Johnson Goh, Chorng Haur Sow

    None

    更新日期:2018-03-16
  • Flexible self-charging power units for portable electronics based on folded carbon paper
    Nano Res. (IF 7.354) Pub Date : 2018-03-13
    Changjie Zhou, Yanqin Yang, Na Sun, Zhen Wen, Ping Cheng, Xinkai Xie, Huiyun Shao, Qingqing Shen, Xiaoping Chen, Yina Liu, Zhong Lin Wang, Xuhui Sun

    The urgent demand for portable electronics has promoted the development of high-efficiency, sustainable, and even stretchable self-charging power sources. In this work, we propose a flexible self-charging power unit based on folded carbon (FC) paper for harvesting mechanical energy from human motion and power portable electronics. The present unit mainly consists of a triboelectric nanogenerator (FC-TENG) and a supercapacitor (FC-SC), both based on folded carbon paper, as energy harvester and storage device, respectively. This favorable geometric design provides the high Young’s modulus carbon paper with excellent stretchability and enables the power unit to work even under severe deformations, such as bending, twisting, and rolling. In addition, the tensile strain can be maximized by tuning the folding angle of the triangle-folded carbon paper. Moreover, the waterproof property of the packaged device make it washable, protect it from human sweat, and enable it to work in harsh environments. Finally, the as-prepared self-charging power unit was tested by placing it on the human body to harvest mechanical energy from hand tapping, foot treading, and arm touching, successfully powering an electronic watch. This work demonstrates the impressive potential of stretchable self-charging power units, which will further promote the development of high Young’s modulus materials for wearable/portable electronics.

    更新日期:2018-03-14
  • Facile synthesis of graphene-supported Ni-CeO x nano-composites as highly efficient catalysts for hydrolytic dehydrogenation of ammonia borane
    Nano Res. (IF 7.354) Pub Date : 2018-03-13
    Qilu Yao, Zhang-Hui Lu, Yuwen Yang, Yuzhen Chen, Xiangshu Chen, Hai-Long Jiang

    Development of low-cost and high-performance catalysts for hydrogen generation via hydrolysis of ammonia borane (NH3BH3, AB) is a highly desirable pathway for future hydrogen utilization. In this work, Ni nanocatalysts doped with CeO x and supported on graphene (Ni-CeO x /graphene) were synthesized via a facile chemical reduction route and applied as robust catalysts for the hydrolysis of AB in aqueous solution at room temperature. The as-synthesized Ni-CeO x /graphene nanocomposites (NCs) exhibited excellent catalytic activity with a turnover frequency (TOF) as high as 68.2 min−1, which is 49-fold higher than that for a simple Ni nanoparticle catalyst and is among the highest values reported for non-noble metal catalysts in AB hydrolysis. The development of efficient and low-cost Ni-CeO x /graphene catalysts enhances the feasibility of using ammonia borane as a chemical hydrogen storage material, which may find application ina hydrogen fuel-cell based economy.

    更新日期:2018-03-13
  • Pt@h-BN core–shell fuel cell electrocatalysts with electrocatalysis confined under outer shells
    Nano Res. (IF 7.354) Pub Date : 2018-03-13
    Mengmeng Sun, Jinchao Dong, Yang Lv, Siqin Zhao, Caixia Meng, Yujiang Song, Guoxiong Wang, Jianfeng Li, Qiang Fu, Zhongqun Tian, Xinhe Bao

    Two-dimensional (2D) materials such as graphene and hexagonal boron nitride (h-BN) can be used as robust and flexible encapsulation overlayers, which effectively protect metal cores but allow reactions to occur between inner cores and outer shells. Here, we demonstrate this concept by showing that Pt@h-BN core–shell nanocatalysts present enhanced performances in H2/O2 fuel cells. Electrochemical (EC) tests combined with operando EC-Raman characterizations were performed to monitor the reaction process and its intermediates, which confirm that Pt-catalyzed electrocatalytic processes happen under few-layer h-BN covers. The confinement effect of the h-BN shells prevents Pt nanoparticles from aggregating and helps to alleviate the CO poisoning problem. Accordingly, embedding nanocatalysts within ultrathin 2D material shells can be regarded as an effective route to design high-performance electrocatalysts.

    更新日期:2018-03-13
  • Insights into the efficiency and stability of Cu-based nanowires for electrocatalytic oxygen evolution
    Nano Res. (IF 7.354) Pub Date : 2018-03-12
    Jun Yu, Qi Cao, Bin Feng, Changli Li, Jingyuan Liu, J. Kenji Clark, Jean-Jacques Delaunay

    None

    更新日期:2018-03-12
  • Titanium nitride hollow nanospheres with strong lithiumpolysulfide chemisorption as sulfur hosts for advancedlithium-sulfur batteries
    Nano Res. (IF 7.354) Pub Date : 2018-03-12
    Chuanchuan Li, Jingjing Shi, Lin Zhu, Yingyue Zhao, Jun Lu, Liqiang Xu

    None

    更新日期:2018-03-12
  • Edge-functionalized graphene quantum dots as a thickness-insensitive cathode interlayer for polymer solar cells
    Nano Res. (IF 7.354) Pub Date : 2018-03-10
    Han Xu, Lu Zhang, Zicheng Ding, Junli Hu, Jun Liu, Yichun Liu

    A thickness-insensitive cathode interlayer (CIL) is necessary for large-area polymer solar cells (PSCs), in which thickness variation is unavoidable. These CIL materials are typically based on n-type conjugated polymer/molecule backbones, which show strong light absorption in the visible/near-infrared (NIR) region. This interferes with the sunlight absorption by the active layerand deteriorates device efficiency. In this study, we developed graphene quantum dots functionalized with ammonium iodide (GQD-NI) at the edge as a thickness-insensitive CIL with high optical transparency. The peripheral ammonium iodide groups of GQD-NI formed the desired interfacial dipole with the cathode to decrease the work function. The graphene basal planes of GQD-NI with a lateral size of ca. 3 nm demonstrated a good conductivity of 3.56 × 10–6 S·cm–1 and high transparency in the visible/NIR region (λmaxabs = 228 nm). Moreover, GQD-NI was readily soluble in polar organic solvents, e.g., methanol, which enabled multilayer device fabrication with orthogonal solvent processing. As a result, the PSC device with GQD-NI as the CIL exhibited a power conversion efficiency (PCE) of 7.49%, which was much higher than that of the device without the CIL (PCE = 5.38%) or with calcium as the CIL (PCE = 6.72%). Moreover, the PSC device performance of GQD-NI was insensitive to the GQD-NI layer thickness in the range of 2–22 nm. These results indicate that GQD-NI is a very promising material for application as a CIL in large-area printed PSCs.

    更新日期:2018-03-12
  • Extreme biomimetics: A carbonized 3D spongin scaffoldas a novel support for nanostructured manganese oxide(IV)and its electrochemical applications
    Nano Res. (IF 7.354) Pub Date : 2018-03-09
    Tomasz Szatkowski, Kacper Kopczyński, Mykhailo Motylenko, Horst Borrmann, Beata Mania, Małgorzata Graś, Grzegorz Lota, Vasilii V. Bazhenov, David Rafaja, Friedrich Roth, Juliane Weise, Enrico Langer, Marcin Wysokowski, Sonia Żółtowska-Aksamitowska, Iaroslav Petrenko, Serguei L. Molodtsov, Jana Hubálková, Christos G. Aneziris, Yvonne Joseph, Allison L. Stelling, Hermann Ehrlich, Teofil Jesionowski

    None

    更新日期:2018-03-10
  • Natural polypeptides treat pollution complex: Moisture-resistant multi-functional protein nanofabrics for sustainable air filtration
    Nano Res. (IF 7.354) Pub Date : 2018-03-09
    Huafeng Tian, Xuewei Fu, Min Zheng, Yu Wang, Yichao Li, Aimin Xiang, Wei-Hong Zhong

    None

    更新日期:2018-03-09
  • Enzyme@silica nanoflower@metal-organic framework hybrids: A novel type of integrated nanobiocatalysts with improved stability
    Nano Res. (IF 7.354) Pub Date : 2018-03-09
    Yingjie Du, Jing Gao, Huajiao Liu, Liya Zhou, Li Ma, Ying He, Zhihong Huang, Yanjun Jiang

    None

    更新日期:2018-03-09
  • Catalyzing polysulfide conversion by g-C 3 N 4 in a graphene network for long-life lithium-sulfur batteries
    Nano Res. (IF 7.354) Pub Date : 2018-03-08
    Meng Wang, Qinghua Liang, Junwei Han, Ying Tao, Donghai Liu, Chen Zhang, Wei Lv, Quan-Hong Yang

    The practical application of lithium-sulfur batteries with a high energy density has been plagued by the poor cycling stability of the sulfur cathode, which is a result of the insulating nature of sulfur and the dissolution of polysulfides. Much work has been done to construct nanostructured or doped carbon as a porous or polar host for promising sulfur cathodes, although restricting the polysulfide shuttle effect by improving the redox reaction kinetics is more attractive. Herein, we present a well-designed strategy by introducing graphitic carbon nitride (g-C3N4) into a three-dimensional hierarchical porous graphene assembly to achieve a synergistic combination of confinement and catalyzation of polysulfides. The porous g-C3N4 nanosheets in situ formed inside the graphene network afford a highly accessible surface to catalyze the transformation of polysulfides, and the hierarchical porous graphene-assembled carbon can function as a conductive network and provide appropriate space for g-C3N4 catalysis in the sulfur cathode. Thus, this hybrid can effectively improve sulfur utilization and block the dissolution of polysulfides, achieving excellent cycling performance for sulfur cathodes in lithium-sulfur batteries.

    更新日期:2018-03-08
  • Exciton dissociation dynamics and light-driven H 2 generation in colloidal 2D cadmium chalcogenide nanoplatelet heterostructures
    Nano Res. (IF 7.354) Pub Date : 2018-03-08
    Qiuyang Li, Tianquan Lian

    Solar-to-H2 conversion is attracting much research attention as a potential approach to meet global renewable energy demands. Although significant advances have been made using metal-tipped colloidal cadmium chalcogenide zero-dimensional (0D) quantum dots and one-dimensional (1D) nanorod heterostructures in solar-to-H2 conversion, their efficiency may be further enhanced using an emerging class of colloidal cadmium chalcogenide nanocrystals, namely two-dimensional (2D) nanoplatelets (NPLs), because of their unique properties. In this review, we summarize the recent advances on exciton dissociation dynamics and light-driven H2 generation performance of colloidal nanoplatelet heterostructures. Following an introduction on the electronic structure of 2D NPLs, we discuss the dynamics of exciton dissociation by electron transfer to molecular acceptors. The exciton quenching dynamics of CdS NPL-Pt and CdSe NPL-Pt heterostructures are compared to highlight the effect of material properties on the relative contributions of the energy-transfer and electron-transfer pathways. Representative solar-to-H2 conversion performances of 2D NPL-metal heterostructures are discussed and compared with those of 1D nanorod-metal heterostructures. Finally, we discuss the challenges in further improving the solar-to-fuel conversion efficiencies of these systems.

    更新日期:2018-03-08
  • Simultaneous elimination of cancer stem cells and bulkcancer cells by cationic-lipid-assisted nanoparticles for cancer therapy
    Nano Res. (IF 7.354) Pub Date : 2018-03-05
    Kaige Chen, Song Shen, Gui Zhao, Zhiting Cao, Xianzhu Yang, Jun Wang

    None

    更新日期:2018-03-06
  • Aqueous electrocatalytic N 2 reduction under ambient conditions
    Nano Res. (IF 7.354) Pub Date : 2018-03-02
    Na Cao, Gengfeng Zheng

    None

    更新日期:2018-03-02
  • Conversion of confined metal@ZIF-8 structures to intermetallic nanoparticles supported on nitrogen-doped carbon for electrocatalysis
    Nano Res. (IF 7.354) Pub Date : 2018-03-01
    Zhiyuan Qi, Yuchen Pei, Tian Wei Goh, Zhaoyi Wang, Xinle Li, Mary Lowe, Raghu V. Maligal-Ganesh, Wenyu Huang

    We report a facile strategy to synthesize intermetallic nanoparticle (iNP) electrocatalysts via one-pot pyrolysis of a zeolitic imidazolate framework, ZIF-8, encapsulating precious metal nanoparticles (NPs). ZIF-8 serves not only as precursor for N-doped carbon (NC), but also as Zn source for the formation of intermetallic or alloy NPs with the encapsulated metals. The resulting sub-4 nm PtZn iNPs embedded in NC exhibit high sintering resistance up to 1,000 °C. Importantly, the present methodology allows fine-tuning of both composition (e.g., PdZn and RhZn iNPs, as well as AuZn and RuZn alloy NPs) and size (2.4, 3.7, and 5.4 nm PtZn) of the as-formed bimetallic NPs. To the best of our knowledge, this is the first report of a metal-organic framework (MOF) with multiple functionalities, such as secondary metal source, carbon precursor, and size-regulating reagent, which promote the formation of iNPs. This work opens a new avenue for the synthesis of highly uniform and stable iNPs.

    更新日期:2018-03-01
  • Erratum to: Silicene on non-metallic substrates: Recent theoretical and experimental advances
    Nano Res. (IF 7.354) Pub Date : 2018-02-02
    Emilio Scalise, Konstantina Iordanidou, Valeri V. Afanas’ev, André Stesmans, Michel Houssa

    The name of the second author in the original version of this article was unfortunately wrongly written on page 1169. Instead of Kostantina Iordanidou It should read Konstantina Iordanidou

    更新日期:2018-02-02
Some contents have been Reproduced with permission of the American Chemical Society.
Some contents have been Reproduced by permission of The Royal Society of Chemistry.
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