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  • Dispersion of optical and structural properties in gel column separated carbon nanoparticles
    Carbon (IF 6.337) Pub Date : 2017-11-17
    Alina A. Kokorina, Ekaterina S. Prikhozhdenko, Nadezda V. Tarakina, Andrei V. Sapelkin, Gleb B. Sukhorukov, Irina Y. Goryacheva

    We report an effective and simple method for separation of carbon nanodots (CNDs) by size-exclusion chromatography that yields CNDs fractions with different sizes and luminescent properties. As a result, three major types of CNDs with spectrally distinct luminescent centers were identified. The first type of luminescent particles has emission maxima at about 400–440 nm, the highest size and luminescence intensity. CNDs of the second type have a middle size and the lowest luminescence intensity with emission maxima in the range 450–470 nm. The distinctive feature of these two fractions is the excitation-dependent shift of the emission maxima to longer wavelengths. The third type of CNDs has luminescence around 520 nm with no emission shift upon the increase of excitation wavelength and the smallest size. The observed spectral variations in different fractions correlate with a change in average particle size as seen in TEM images. Size fractionation of CNDs mixture is very important to many fields, mostly for bioimaging and medicine applications because it leads to CNDs' unified distribution and behavior. Dilution of CNDs in water suspension leads to the increase of emission intensity and shifts the PL spectra to shorter wavelengths providing evidence for concentration quenching effect in CNDs.

    更新日期:2017-11-17
  • Influence of chemical bonding on the variability of diamond-like carbon nanoscale adhesion
    Carbon (IF 6.337) Pub Date : 2017-11-17
    Rodrigo A. Bernal, Polun Chen, J. David Schall, Judith A. Harrison, Yeau-Ren Jeng, Robert W. Carpick

    Diamond-like-carbon (DLC) is a promising material for tribological applications such as hard-disks, automotive, machine-tool, and aerospace coatings. We performed in-situ transmission electron microscopy (TEM) and molecular dynamics (MD) studies of nanoscale single-asperities made of tetrahedral amorphous carbon (ta-C, a type of DLC with high strength) contacting single-crystal diamond, to understand the factors controlling adhesion. Visualization of the contacts in TEM enabled us to correlate the asperity's geometry and the adhesion measurements. MD simulations allowed the atomic-scale mechanisms of adhesion to be elucidated and correlated with the TEM observations. Experimentally-determined pull-in forces show less scatter than pull-off forces. The magnitude of the pull-in forces is consistent with adhesion arising from van der Waals (VDW) interactions, allowing us to estimate the ta-C/diamond Hamaker constant. MD simulations with the AIREBO potential confirmed that including VDW interactions leads to less scatter in adhesive forces in approach than in separation. MD simulations with the REBO+S potential demonstrate that the large scatter in pull-off forces observed experimentally arises from the complex nature of covalent bonding between substrate and tip, influenced by the local energy landscape, hydrogen coverage, and the number of repeated contact events. The scatter in pull-off force also tends to decrease with increasing roughness.

    更新日期:2017-11-17
  • Lateral heterostructures of two-dimensional materials by electron-beam induced stitching
    Carbon (IF 6.337) Pub Date : 2017-11-17
    Andreas Winter, Antony George, Christof Neumann, Zian Tang, Michael J. Mohn, Johannes Biskupek, Nirul Masurkar, Leela Mohana Reddy Arava, Thomas Weimann, Uwe Hübner, Ute Kaiser, Andrey Turchanin

    We present a novel methodology to synthesize two-dimensional (2D) lateral heterostructures of graphene and MoS2 sheets with molecular carbon nanomembranes (CNMs), which is based on electron beam induced stitching. Monolayers of graphene and MoS2 were grown by chemical vapor deposition (CVD) on copper and SiO2 substrates, respectively, transferred onto gold/mica substrates and patterned by electron beam lithography or photolithography. Self-assembled monolayers (SAMs) of aromatic thiols were grown on the gold film in the areas where the 2D materials were not present. An irradiation with a low energy electron beam was employed to convert the SAMs into CNMs and simultaneously stitching the CNM edges to the edges of graphene and MoS2, therewith forming a heterogeneous but continuous film composed of two different materials. The formed lateral heterostructures possess a high mechanical stability, enabling their transfer from the gold substrate onto target substrates and even the preparation as freestanding sheets. We characterized the individual steps of this synthesis and the structure of the final heterostructures by complementary analytical techniques including optical microscopy, Raman spectroscopy, atomic force microscopy (AFM), helium ion microscopy (HIM), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM) and find that they possess nearly atomically sharp boundaries.

    更新日期:2017-11-17
  • Humidity and CO2 gas sensing properties of double-layer graphene
    Carbon (IF 6.337) Pub Date : 2017-11-17
    Xuge Fan, Karim Elgammal, Anderson D. Smith, Mikael Östling, Anna Delin, Max C. Lemme, Frank Niklaus

    Graphene has interesting gas sensing properties with strong responses of the graphene resistance when exposed to gases. However, the resistance response of double-layer graphene when exposed to humidity and gasses has not yet been characterized and understood. In this paper we study the resistance response of double-layer graphene when exposed to humidity and CO2, respectively. The measured response and recovery times of the graphene resistance to humidity are on the order of several hundred milliseconds. For relative humidity levels of less than ∼3% RH, the resistance of double-layer graphene is not significantly influenced by the humidity variation. We use such a low humidity atmosphere to investigate the resistance response of double-layer graphene that is exposed to pure CO2 gas, showing a consistent response and recovery behaviour. The resistance of the double-layer graphene decreases linearly with increase of the concentration of pure CO2 gas. Density functional theory simulations indicate that double-layer graphene has a weaker gas response compared to single-layer graphene, which is in agreement with our experimental data. Our investigations contribute to improved understanding of the humidity and CO2 gas sensing properties of double-layer graphene which is important for realizing viable graphene-based gas sensors in the future.

    更新日期:2017-11-17
  • Spin-charge transport properties for graphene/graphyne zigzag-edged nanoribbon heterojunctions: A first-principles study
    Carbon (IF 6.337) Pub Date : 2017-11-16
    Liemao Cao, Xiaobo Li, Chunxia Jia, Guang Liu, Ziran Liu, Guanghui Zhou

    Graphene and graphyne hold great potential for spintronic device applications due to their exceptionally good electrical and mechanical properties in the pristine form. Recently, considering these 2D carbon allotropes have similar bond lengths and unit cell shapes, ensuring a perfectly matched interface between them and construction of graphene/graphyne heterojunctions feasible. To this end, we study the spin-charge transport properties for monolayer graphene/graphyne zigzag-edged nanoribbon heterojunctions by employing the ab initio calculations, where two types of γ- and (6,6,12)-graphynes are considered, respectively. Our important result here is that these heterojunctions can exhibit an interesting variation of magnetoresistane by applying ferromagnetic stripes or external magnetic fields onto the ribbons to initially orient their spin configuration. Specifically, the magnetoresistance ratio can be up to 104% for graphene/γ-graphyne heterojunction, but only 300% for the graphene/(6,6,12)-graphyne one. In addition, the effects of spin-filtering and negative differential resistance are also observed in those heterojunctions. The maximum of spin filtering efficiency can be up to 99%. The mechanisms are revealed and analyzed by the connection of these effects to the evolution of the spin-resolved electron transmission spectra and pathways around the Fermi level at zero bias.

    更新日期:2017-11-16
  • Synthesis and Optoelectronic Applications of Graphene/Transition Metal Dichalcogenides Flat-Pack Assembly
    Carbon (IF 6.337) Pub Date : 2017-11-16
    Henan Li, Yumeng Shi, Lain-Jong Li

    Being a representative candidate from the two-dimensional (2D) materials family, graphene has been one of the most intensively researched candidates because of its ultrahigh carrier mobility, quantum Hall effects, excellent mechanical property and high optical transmittance. Unfortunately, the lack of a band gap makes graphene a poor fit for digital electronics, where the current on/off ratio is critical. Huge efforts have been advocated to discover new 2D layered materials with wonderful properties, which complements the needs of 2D electronics. Appropriately designed graphene based hybrid structure could perform better than its counterpart alone. The graphene hybrid structure soon become one of the most exciting frontiers in advanced 2D materials, and many efforts have been made to create artificial heterostructures by assembling of graphene with various layered materials. In this review, we present the recent development in synthesis and applications of graphene based 2D heterostructures. Although 2D transition metal dichalcogenide semiconductors have been demonstrated as strong candidates for next-generation electronics and optoelectronics, by combining advantages of various properties of 2D materials together with graphene, it is highly possible to build entire digital circuits using atomically thin components, and create many novel devices that can be utilized in different areas.

    更新日期:2017-11-16
  • Fabricating Pt-decorated three dimensional N-doped carbon porous microspherical cavity catalyst for advanced oxygen reduction reaction
    Carbon (IF 6.337) Pub Date : 2017-11-15
    Yaru Cheng, Huiting Lu, Kai Zhang, Fan Yang, Wenhao Dai, Conghui Liu, Haifeng Dong, Xueji Zhang

    Abundant and low-cost materials with high electrochemical catalytic activity for oxygen reduction reaction (ORR) are in urgent demand for energy storage and conversion devices. In this work, an advanced ORR electrocatalyst of Pt-decorated three dimensional (3D) N-doped carbon porous microspherical cavity (Pt<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">N/C PMC) was fabricated by using polystyrene microspheres (PS) as template, and dopamine and K2PtCl6 as precursors. Microscopic and spectroscopic characterizations revealed large surface area available and affluent pore structures were observed in the resulted Pt<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">N/C PMCs, and numerous Pt nanoparticles (NPs) with active (111) facet were decorated on the surface of N/C PMCs. The proposed Pt<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">N/C CMCs presented good onset potential, remarkable mass activity (MA) and specific activity (SA), superb methanol tolerance and excellent durability toward ORR in alkaline solutions. The numerous decorated Pt with high active (111) facet coupled with high content of active pyridinic and graphitic nitrogen synergistically contributed to the enhanced ORR activity, while the unique 3D porous structures facilitated O2 and electrolyte transport during the ORR process. This work may open new avenue for designing advanced and cost-effective Pt-based ORR catalyst.

    更新日期:2017-11-16
  • Tailored CuO nanostructures decorated amorphous carbon nanotubes hybrid for efficient field emitter with theoretical validation
    Carbon (IF 6.337) Pub Date : 2017-11-15
    Supratim Maity, Swati Das, Dipayan Sen, Kalyan Kumar Chattopadhyay

    Amalgamation of excellent properties of semiconductor nanostructure and carbon nanotubes (CNT) creates advanced material with superior properties which are otherwise unachievable. Here we report cupric oxide (CuO) nanostructure decorated amorphous carbon nanotubes (aCNT) with improved field emission properties. Sharp wedge shaped CuO nanostructure attached aCNT is prepared by a simple cost effective large scale synthesis procedure. Pristine aCNT and CuO-aCNT hetero structure are characterised by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and Raman spectroscopy. Field emission properties of CuO-aCNT hybrid structure is compared with bare aCNT sample. The turn-on field of CuO-aCNT in comparison with pristine aCNT is downshifted from 8.07 V/μm to 3.73 V/μm. Density functional theory calculation of aCNT and CuO-aCNT hybrid model has been employed to calculate the work function and hence to estimate the field enhancement factor. This theoretical study has supported our experimental result. Furthermore, the origin of local field enhancement of the hybrid nanostructure is examined by finite element modelling method.

    更新日期:2017-11-15
  • Next generation membranes —using tailored carbon
    Carbon (IF 6.337) Pub Date : 2017-11-15
    Oishi Sanyal, Chen Zhang, Graham B. Wenz, Shilu Fu, Nitesh Bhuwania, Liren Xu, Meha Rungta, William J. Koros

    Carbon molecular sieve (CMS) membranes are a special class of nanoporous membranes with angstrom-level molecular discrimination properties, which make them appealing for separating a wide spectrum of gas-pairs. The mechanism of pyrolysis by which a polymer coil is transformed into these rigid sieves is complex; however, we present a framework that can explain this transformation. Representative polymer precursors and pyrolysis conditions are discussed that yield attractive CMS membrane separation performance for extremely challenging gas pairs. Control of penetrant motions in the diffusion activated state, reflected in the entropy of activation of subtly different penetrants, enables the attractive diffusion selectivity of such membranes. This control, virtually absent even in rigid state-of-the-art polymeric membranes, makes CMS materials extraordinarily attractive. Moreover, unlike other rigid sieving materials, CMS membranes have the added advantage of being processable into highly productive, flexible hollow fibers with good mechanical properties and long-term stability under constant gas feeds. In this article, we also identify some key areas of CMS which would greatly benefit from expertise from other fields like computation or materials characterization that can potentially complement transport-based studies.

    更新日期:2017-11-15
  • 3D superelastic graphene aerogel-nanosheet hybrid hierarchical nanostructure as high-performance supercapacitor electrode
    Carbon (IF 6.337) Pub Date : 2017-11-15
    Qiangqiang Zhang, Yu Wang, Baoqiang Zhang, Keren Zhao, Pingge He, Boyun Huang

    A three-dimensional graphene-based nanostructure with graphene aerogel templating graphene nanosheets (GA-GNs) has been fabricated via a modified hydrothermal method, followed by a microwave plasma chemical vapor deposition process. The mechanical properties of such hybrid nanostructures, for the first time, were quantitatively measured to demonstrate their superior mechanical robustness with stress and Young's modulus up to 96 kPa and 181.25 kPa, respectively. Finite-element modeling further reveals the mechanical strengthening mechanism with GNs as stiffening ribs layered over thin cellular walls within the GA. Moreover, GA-GNs present excellent electrical conductivity as high as ∼1000 S/m, showing great promise as high-performance supercapacitor electrodes. The as-prepared free-standing and binder-free GA-GN electrode exhibits a high specific capacitance of 245 F g−1 (based on the entire electrode mass) which corresponds to a high areal capacitance of 1.1 F cm−2, desirable rate capability and outstanding cyclic stability with a capacitance retention of 92% over 10000 cycles. To assess their practical functionality, a two-terminal symmetric all-solid-state supercapacitor based on such all-carbon electrodes was fabricated. Such supercapacitor devices exhibited desirable areal capacitance, low internal resistance and outstanding cyclic stability.

    更新日期:2017-11-15
  • Interactions between bacteria and heteroatom-modified nanoporous carbon: The influence of nitrogen and sulfur doping
    Carbon (IF 6.337) Pub Date : 2017-11-15
    Wojciech Kiciński, Mateusz Szala, Tomasz Cłapa, Marcin Syczewski, Andrzej Borkowski

    Heteroatom-doped carbon structures have successfully entered the field of advanced functional materials but their impact on living organisms is still poorly examined. Interactions between typical Gram-negative bacteria Escherichia coli, Gram-positive Bacillus cereus and heteroatom-doped nanoporous carbons are studied in this paper. Four types of carbonaceous materials, that is N-doped, S-doped, S/N-co-doped and undoped carbon gels, are considered. Respirometric measurements, dehydrogenases activity and viability tests were conducted to assess the toxicity of the doped carbons against bacteria. The heteroatom-doped and dopant-free carbon gels do not cause an inhibition of bacterial growth nor a lethal effect. On the contrary, we demonstrate that the doped carbons enhance microbial activity. The adhesion of bacteria to the carbon surface was investigated based on the adsorption studies and biofilm formation. It is demonstrated that the doping of carbons with nitrogen induces surface acidity and hydrophilicity, which in turn significantly enhances the bacteria sorption. Unlike the S-doped or undoped materials, the N-doped carbons are characterized by high bacterial affinity, even when compared to efficient bacteria adsorbents, e.g. active carbon Norit. The results obtained demonstrate that N-containing carbon gels support bacterial proliferation and as such may constitute attractive materials for wastewater treatment technologies as well as bioelectrochemical processes.

    更新日期:2017-11-15
  • Properties of graphene-metal contacts probed by Raman spectroscopy
    Carbon (IF 6.337) Pub Date : 2017-11-15
    Hejun Xu, Xing Wu, Xinming Li, Chen Luo, Fang Liang, Edmond Orignac, Jian Zhang, Junhao Chu

    The high intrinsic carrier mobility of graphene has drawn much attention. However, the high contact resistance between the graphene and metal electrode limits the application of high-speed graphene-based transistors. In this work, we combined both electrical characterization and Raman spectroscopy to study the contact resistance issue in graphene field effect transistor (FET). As FET size scaling down, the graphene-metal contact resistance is found to be a significant contributor to the total resistance. The signature of the graphene/metal bonding with various metal electrodes is probed by using high-resolution Raman spectroscopy. Graphene-metal Raman signals vary on different metal electrodes. This study unearths the properties of the graphene/metal bonding, and paves a way for the investigations into improving the stability and scalability of the graphene-based transistor for future high-speed nanoelectronics.

    更新日期:2017-11-15
  • Synergism between carbon materials and Ni chains in flexible poly(vinylidene fluoride) composite films with high heat dissipation to improve electromagnetic shielding properties
    Carbon (IF 6.337) Pub Date : 2017-11-14
    Biao Zhao, Sai Wang, Chongxiang Zhao, Ruosong Li, S. Mahdi Hamidinejad, Yasamin Kazemi, Chul B. Park

    We prepared poly(vinylidene fluoride) (PVDF)/carbon/Ni-chain composites by dispersing Ni chains, and either carbon nanotubes (CNTs) or graphene nanoplatelets (GNPs) into a PVDF solution. The electrical conductivity and the electromagnetic interference (EMI) shielding properties of the PVDF/CNT/Ni-chain and the PVDF/GNP/Ni-chain composites were increased by increasing the Ni-chain filler content. The electrical conductivity of the PVDF/CNT/10 wt%Ni-chain composite was lower than the PVDF/CNT/6 wt%Ni-chain composite. We attributed this abnormality to the Ni chains having blocked the CNT connections, when there was a high Ni-chain content. Furthermore, the PVDF-based composites' EMI shielding properties were effectively tuned by controlling the films' thicknesses. The total shielding of the PVDF/CNT/6 wt%Ni-chain and the PVDF/GNP/8 wt%Ni-chain composite films increased from 23.6 to 57.3 dB and from 22.7 to 55.8 dB, as their thicknesses were increased from 0.3 mm to 0.6 mm, respectively. The synergetic relationship between the Ni chains and the carbon materials (CNT or GNP), meant that the main EMI shielding mechanisms of the PVDF/carbon/Ni-chain composites had resulted from the absorption process. Moreover, these composites possessed high thermal conductivity, which can convert microwave energy into Joule heating systems. Thus, these PVDF-based composite films can be used to make high-efficiency EMI shielding devices that can rapidly dissipate heat.

    更新日期:2017-11-15
  • Effect of matrix-alloying-element chromium on the microstructure and properties of graphite flakes/copper composites fabricated by hot pressing sintering
    Carbon (IF 6.337) Pub Date : 2017-11-14
    Shubin Ren, Jianhao Chen, Xinbo He, Xuanhui Qu

    Copper matrix composites reinforced with graphite flakes (GFs/Cu) were fabricated by powder hot pressing method and the alloying chromium (Cr) element in powdered form was directly added into the Cu matrix powder to enhance the interfacial bonding between GFs and Cu matrix. Effects of addition of Cr on thermal conductivity (TC), coefficient of thermal expansion (CTE), and bending strength of GFs/Cu composites in X-Y (basal plane of GF) and Z directions were investigated in this study. The results showed that in X-Y direction, the TC of 50 vol.% GFs/Cu composites increased from 560 to 628 W m−1 K−1 after adding 2.0 wt.% Cr, and the bending strength nearly doubled from 53.8 (GF/Cu) to 93 MPa. The CTE in Z direction could be obviously reduced with Cr addition, which dropped gradually from 9.4 to 3.2 ppm K−1 at 150 °C with the increase in content of Cr from 0 to 5.0 wt.%. This improvement in TC, bending strength, and CTE is attributed to the formation of carbide transition layer at the interface between Cu and graphite. The detailed influence of carbide layer on the properties of the composites was thoroughly studied by corresponding evolution of interfacial microstructure with increasing Cr content.

    更新日期:2017-11-14
  • Effect of Ti doping on spin injection and relaxation in few-layer graphene
    Carbon (IF 6.337) Pub Date : 2017-11-12
    Bing Zhao, Xiaoguang Xu, Le Wang, Juan Li, Ziyu Zhang, Pengfei Liu, Qi Liu, Zhicheng Wang, Yong Jiang

    Abstract We demonstrate the spin filtering effect in Co|MgO|TiOx|graphene junctions and a large negative spin polarization in graphene at room temperature. By systematically introducing Ti (TiOx) clusters to the exfoliated few-layer graphene, we confirm that the Ti (TiOx) clusters will increase the charged impurity scattering and lead to a decreased momentum scattering time and an abnormal Gaussian broadening effect. However, the spin relaxation mechanism is not significantly affected, indicating that the spin relaxation mechanism of graphene will not be affected by the atomic-scale Ti (TiOx) clusters induced charged impurity scattering.

    更新日期:2017-11-13
  • Root-like porous carbon nanofibers with high sulfur loading enabling superior areal capacity of lithium sulfur batteries
    Carbon (IF 6.337) Pub Date : 2017-11-11
    Xiaohui Zhao, Miso Kim, Ying Liu, Hyo-Jun Ahn, Ki-Won Kim, Kwon-Koo Cho, Jou-Hyeon Ahn

    A hierarchically porous carbon nanofiber (HPCNF) material was prepared by a facile electrospinning method, with polyvinylpyrrolidone (PVP) as the carbon source and silica formed in-situ as the template. The carbon nanofibers showed a well-designed pore structure: centered macropores are surrounded by a denser cycle consisting of micro-/mesopores near the surface. Sulfur was encapsulated into the pores by solution penetration, followed by a melt diffusion method to generate a flexible sulfur/HPCNF (S/HPCNF) cloth as the binder-free cathode in lithium sulfur (Li-S) batteries. The HPCNF carbon with multi-scaled pores acts as an efficient host for large amounts of sulfur, and accommodates the associated volume expansion during electrochemical cycling. Moreover, the hierarchical architecture significantly reduces the escape of polysulfides during the cycling. The unique material allowed sulfur loading of 2.2–12.1 mg cm−2, and exhibited a high sulfur utilization of more than 80% with high areal capacity of 11.3 mAh cm−2, demonstrating that S/HPCNF is a promising cathode material for Li-S batteries of high energy density.

    更新日期:2017-11-13
  • Adhesive transfer at copper/diamond interface and adhesion reduction mechanism with fluorine passivation: A first-principles study
    Carbon (IF 6.337) Pub Date : 2017-11-11
    Zengjia Liu, Shaoxian Zheng, Zhibin Lu, Jibin Pu, Guangan Zhang

    Tribological behavior of Cu is peculiar among soft metal when it rubs on diamond flat in experiments, and passivating element F and H at Cu/diamond interface can affect mechanical properties and even tribological characteristics as well, related special adhesive transfer (fracture location) and adhesion tuning mechanism at Cu/diamond interface remain obscure. Here, we investigate the interfacial structure change, electronic and mechanical properties of Cu/diamond and interface with fully F passivation (Cu/diamond:F) through first-principles calculations. The study shows that Cu(111)/diamond(111) interface exhibits the special phenomenon of adhesive transfer (different cleavage location and interfacial strength under applied load) due to adhesion, and this contribute to different frictional properties among soft metal. The effect on mechanical properties of F at Cu/diamond interface is studied systematically, passivation of fluorine on diamond surface reduces work of separation of the interface significantly, from 3.64 to 0.02 J/m2. Combining with kinetic analysis, we gain that fluorine might be a kind of promising adhesion-reducing element at interface and improve related tribological characteristics of Cu(111)/diamond(111) system. The results of this study benefit the understanding of different tribological properties of Cu/diamond system, adhesion reduction mechanism of fluorine at interface and its effect on tribological behavior at atomic scale.

    更新日期:2017-11-13
  • Carbon dot capped gold nanoflowers for electrochemiluminescent aptasensor of thrombin
    Carbon (IF 6.337) Pub Date : 2017-11-10
    Xu You, Wei Lin, Huan Wu, Yongqiang Dong, Yuwu Chi

    A simple method has been developed to synthesize carbon dot capped gold nanoflower (CD/AuNF) nanohybrids. In principle, anodic electrochemiluminescent (ECL) carbon dots (CDs) with a lot of reductive functional groups were used to react with oxidative hydrogen tetrachloroaurate trihydrate in the presence of trisodium citrate. The obtained globular CD/AuNF nanohybrids had uniform sizes of 50–60 nm. The CD/AuNF nanohybrids were composed of gold nanoparticle aggregates in the centers and CDs on the surfaces. The easy self-assembly with some bio-molecules of AuNFs and the unique ECL activities of the CDs, made the obtained CD/AuNF nanohybrids promising in biosensing. For instance, a novel ECL aptasensor for thrombin (TB) detection has been developed based on the CD/AuNF nanohybrids. The aptasensor showed good selectivity towards TB. Furthermore, it presented a wide linear response range from 0.5 nM to 40 nM and a low detection limit (S/N = 3) of 0.08 nM.

    更新日期:2017-11-13
  • Instabilities in carbon nanocone stacks
    Carbon (IF 6.337) Pub Date : 2017-11-09
    Arindam Raj, Aningi Mokhalingam, Shakti S. Gupta

    Possessing remarkable electronic, mechanical and optical properties, pristine single-walled carbon nanocones are envisioned here to be pulled-out co-axially from a nanocone stack. The process is simulated using molecular mechanics (MM) and dynamics (MD) employing MM3 and REBO + LJ potentials, respectively. During pulling-out, rim of the lowermost cone is constrained while the tip of the outermost cone is displaced axially from its equilibrium, quasi-statically in case of MM and by prescribing velocity of 0.1 Å/pico-sec in case of MD. During pulling-out, at a critical distance, the top cone abruptly breaks the axial symmetry with its wall deforming considerably outward. The source of this instability is building-up of compressive circumferential strain in wall with increasing displacement; a competition between stretching and van der Waal's energy terms of the system. Interestingly, during reversal of the pulling-out process, the system is found to trace a different equilibrium path. Further, in a few-walled CNCs if the tip of the top-most cone is compressed from its equilibrium position, the stack inverts completely by breaking axial symmetry aided by snap-through buckling in segments of the periphery. Irrespective of apex angle, hydrogen passivation, temperature and potential used, the aforementioned observations are found to be intrinsic to the system.

    更新日期:2017-11-10
  • Phosphorus and sulfur codoped g-C3N4 as an efficient metal-free photocatalyst
    Carbon (IF 6.337) Pub Date : 2017-11-09
    Chechia Hu, Wei-Zeng Hung, Mao-Sheng Wang, Pei-Ju Lu

    In this study, the photocatalytic activity of graphitic carbon nitride (g-C3N4) was improved by codoping S and P on the interstitial and carbon sites of its aromatic heptazine units, respectively. X-ray photoelectron spectra and X-ray diffraction measurements demonstrated that P covalently bonded with N because of the substitution of C with P and that S was located at the interstitial sites with relatively weak bonding with N in the heptazine units of the g-C3N4 structure. The samples of g-C3N4 codoped with P and S (PSCN) displayed low photoluminescence emission intensity, suggesting suppressed recombination of photogenerated charges, and thus increased photocatalytic degradation activity. In particular, PC (C replaced by P) and Si (interstitial doping of S) doping on g-C3N4 was prominently able to enhance the charge transfer through the N<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">S<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">N<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">C<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">N<img border="0" alt="single bond" src="https://cdn.els-cdn.com/sd/entities/sbnd">P pathway to cross the heptazine units for the photocatalytic reaction, making PSCN a highly visible-active and effective metal-free photocatalyst.

    更新日期:2017-11-10
  • Metal-organic framework derived nanoporous carbon/Co3O4 composite electrode as a sensing platform for the determination of glucose and high-performance supercapacitor
    Carbon (IF 6.337) Pub Date : 2017-11-08
    Yuvaraj Haldorai, Sang Rak Choe, Yun Suk Huh, Young-Kyu Han

    Here, we demonstrate the controlled synthesis of nanoporous carbon and cobalt oxide (NPC–Co3O4) composite from a single precursor source zeolitic imidazolate framework-67, which leads to some new interesting electrochemical properties. The composite shows an outstanding electrochemical performance for measuring the oxidation of glucose in alkaline solution. The differential pulse voltammetric response of the NPC–Co3O4 composite electrode for the sensing of glucose exhibits a linear relation with the concentration range of 5 × 10-12–2.05 × 10-10 M and a low detection limit of 2 × 10-12 M. The fabricated sensor shows high sensitivity, reliable reproducibility, and good selectivity. The sensor, when used for the direct determination of glucose in blood serum samples, shows good recovery (98.5–101.0%), suggesting its feasibility for biomedical applications. In addition, in a given potential range of 0 to 1 V, the composite exhibits a high capacitance (885 F g-1 at a current density of 2.5 A g-1) and long cycle life (∼94% capacitance retention after 10,000 cycles).

    更新日期:2017-11-10
  • Investigation of the microstructure change due to phase transition in nanosecond pulsed laser processing of diamond
    Carbon (IF 6.337) Pub Date : 2017-11-08
    G.B.J. Cadot, K. Thomas, J.P. Best, A.A. Taylor, J. Michler, D.A. Axinte, J. Billingham

    Experiments and theory are employed to investigate the thermal damage induced by infra-red nanosecond pulses in atmospheric air into a boron-doped diamond target. Micro-Raman spectroscopy, Transmission Electron Microscopy (TEM) analysis and surface topography measurement are used to investigate the carbon phase created during the rapid heating and cooling of diamond, as well as the amount of material ablated during the interaction with the laser. The analysis provides insight into the phenomena occurring for the rapid graphitisation of diamond during pulsed laser ablation, and also the microstructural disorder induced by the thermal and pressure fields at level of energy below and above the melting threshold. To support the understanding from the experimental investigations, a model is constructed for the graphitisation and ablation of diamond coupled with a collisional radiative model for the plasma evolution. The one-dimensional system of non-linear equations that model the physical processes provides an insight into the dynamics of the phenomena leading to the creation of disturbed graphite during pulsed laser ablation. Furthermore, the model helps to identify the main physical processes leading to the creation of disordered graphite, suggesting that plasma evolution does not follow a Boltzmann-Saha equilibrium and that radiative recombination is a main factor influencing the thermal evolution of the plasma and the diamond target. Finally, a good agreement with experimental findings is obtained, particularly in regards to the amount of material ablated, the thickness of the graphite layer and the processes leading to the melting of graphite.

    更新日期:2017-11-10
  • Understanding the mechanical characteristics of nanotwinned diamond by atomistic simulations
    Carbon (IF 6.337) Pub Date : 2017-11-08
    Ligang Sun, Xiaoqiao He, Jian Lu

    As is known to all, diamond is the hardest natural substance. The synthesis of harder materials than the natural diamond is very favorable but challenging. It has been found that the introduction of nanotwinned (NT) structure into diamond could be an effective approach to improve the hardness of diamond. Nevertheless, the fundamental understanding of the strengthening characteristics by NT structure is still ambiguous. In this work, we unveil the effect of NT structure on the deformation mechanism and mechanical properties of diamond at the atomic scale by virtue of atomistic simulations. Interestingly, the hardness measured by nanoindentation shows a positive correlation to the twin spacing instead of the inverse Hall-Petch effect extensively discovered in many traditional metal materials. However, it is not the smallest twin spacing achieving the highest tensile strength, indicating the existence of twin-spacing-induced inverse Hall-Petch effect in NT diamond during tensile deformation. The specific deformation mechanisms are investigated which are capable of providing an explicit explanation for the observed mechanical characteristics.

    更新日期:2017-11-10
  • Insights on the mechanism of water-alcohol separation in multilayer graphene oxide membranes: Entropic versus enthalpic factors
    Carbon (IF 6.337) Pub Date : 2017-11-07
    Daiane Damasceno Borges, Cristiano F. Woellner, Pedro A.S. Autreto, Douglas S. Galvao

    Experimental evidence has shown that graphene oxide (GO) can be impermeable to liquids, vapors and gases, while it allows a fast permeation of water molecules. Theoretical studies to understand the filtration mechanisms come mostly from water desalination, while very few works have been dedicated to alcohol dehydration. In this work, we have investigated the molecular level mechanism underlying the alcohol/water separation inside GO membranes. A series of Molecular Dynamics and Grand-Canonical Monte Carlo simulations were carried out to probe the ethanol/water and methanol/water separation through GO membranes composed of multiple layered graphene-based films with different interlayer distance values and number of oxygen-containing functional groups. Our results show that the size exclusion and membrane affinities are not sufficient to explain the selectivity. Besides that, the favorable water molecular arrangement inside GO 2D-channels forming a robust H-bond network and the fast water permeation are crucial for an effective separation mechanism. In other words, the separation phenomenon is not only governed by membrane affinities (enthalpic mechanisms) but mainly by the geometry and size factors (entropic mechanisms). Our findings are consistent with the available experimental data and contribute to clarify important aspects of the separation behavior of confined alcohol/water in GO membranes.

    更新日期:2017-11-10
  • Raman spectroscopy revealing noble gas adsorption on single-walled carbon nanotube bundles
    Carbon (IF 6.337) Pub Date : 2017-11-07
    Renato Cunha, Ricardo Paupitz, Kichul Yoon, Adri C.T. Van Duin, Ana Laura Elías, Victor Carozo, Archi Dasgupta, Kazunori Fujisawa, Néstor Perea Lopez, Paulo T. Araujo, Mauricio Terrones

    The interaction of the noble atoms (Ar and Xe) with single-walled carbon nanotube (SWCNT) bundles are investigated using Raman spectroscopy in conjunction with computational modeling known as ReaxFF force field. SWCNT bundles were deposited on transmission electron microscopy (TEM) grids, and different noble gases were adsorbed onto the nanotubes at 20 K. Raman spectra acquired show significant frequency blueshifts of the radial breathing mode (RBM), G- and G′(or 2D)-bands due to gas solidification within the external groove sites (free spaces between the tubes in the bundle) and external surfaces of the bundles. This solid shell formed by the adsorbed gases contributes with a hydrostatic pressure to the system. We show from Raman measurements that the frequencies found after gas adsorption exhibit almost the same shifts indicating that the interactions between SWCNTs bundles and the gases (Ar or Xe) are nearly identical.

    更新日期:2017-11-10
  • Monolayer graphene doping and strain dynamics induced by thermal treatments in controlled atmosphere
    Carbon (IF 6.337) Pub Date : 2017-11-06
    A. Armano, G. Buscarino, M. Cannas, F.M. Gelardi, F. Giannazzo, E. Schilirò, S. Agnello

    Time dynamics of doping and strain induced in single layer graphene by thermal treatments up to 300°C in vacuum, nitrogen, carbon dioxide and oxygen controlled atmosphere are deeply studied by Raman spectroscopy and they are compared with its morphological evolution investigated by Atomic Force Microscopy. The reaction dynamics in oxygen treatments is determined down to a time scale of few minutes as well as that of dedoping process made by water vapor treatment. The interplay of strain modification and doping effects is separated. The strain is clarified to be strongly influenced by the cooling time. The doping removal is dominated by the water vapor, showing that the concentration of molecular water in gas phase governs the process rate. The opportune choice of heating/cooling and atmosphere enables to tune selectively the strain or doping.

    更新日期:2017-11-10
  • Electrosprayed silicon-embedded porous carbon microspheres as lithium-ion battery anodes with exceptional rate capacities
    Carbon (IF 6.337) Pub Date : 2017-11-06
    Gemeng Liang, Xianying Qin, Jinshuo Zou, Laiyan Luo, Yunzhe Wang, Mengyao Wu, Hua Zhu, Guohua Chen, Feiyu Kang, Baohua Li

    Silicon-embedded porous carbon microspheres with an exceptional conductive framework for ions and electrons were obtained by electrospraying a mixed polymer solution of polystyrene and polyvinylpyrrolidone, containing silicon nanoparticles, carbon nanotubes and carbon blacks, and subsequent heat treatment. In the composite microspheres, silicon particles were embedded in the porous carbon framework composed of interwoven carbon nanotubes, filled carbon blacks and interconnected amorphous carbon derived from polymers. The cage-like porous carbon microspheres could not only accommodate the volume expansion of silicon but also ensure a robust electrical contact, fast transport for electrons and ions. Therefore, the silicon/carbon anode exhibits a high capacity of 1325 mAh g−1 at 0.2 A g−1 after 60 cycles and superior rate capability with a capacity of 925 mAh g−1 at a large current density of 5 A g−1.

    更新日期:2017-11-10
  • Engineering graphene properties by modulated plasma treatments
    Carbon (IF 6.337) Pub Date : 2017-11-06
    Giuseppe Valerio Bianco, Alberto Sacchetti, Chiara Ingrosso, Maria Michela Giangregorio, Maria Losurdo, Pio Capezzuto, Giovanni Bruno

    We demonstrate modulated H2 and O2 plasma treatments as an effective methodology for controlled chemical functionalization by hydrogen and oxygen atoms of single- and multi-layer chemical vapor deposition (CVD) graphene aiming at engineering material properties. The effects of the functionalization degree on the optical and transport properties of graphene are discussed with a twofold aim of (i) providing reproducible experimental protocols for tailoring graphene properties, and of (ii) providing insights into the chemical mechanisms involved in the plasma-processing of graphene with hydrogen and oxygen atoms.An unprecedented control over the graphene functionalization by hydrogen atoms is demonstrated together with the fine tuning of multi-layer graphene resistivity as well as the transition from metallic to semiconducting behavior with a gap opening. The interaction of oxygen atoms with multilayer graphene provides a strong modification of surface wettability without significant change in conductivity, thus suggesting that oxidation effects are mainly confined on the outmost graphene. Moreover, the air exposure of graphene oxidized by plasma treatment results in peculiar chemical mechanisms with important effect on the transport properties of the material. Finally, we investigate the restoration of graphene from graphene oxide by modulated hydrogen plasma.

    更新日期:2017-11-10
  • Visible light laser-induced graphene from phenolic resin: A new approach for directly writing graphene-based electrochemical devices on various substrates
    Carbon (IF 6.337) Pub Date : 2017-11-06
    Zhuchan Zhang, Mengmeng Song, Junxing Hao, Kangbing Wu, Chunya Li, Chengguo Hu

    The cost-effective construction of self-designed conductive graphene patterns on desired substrates is crucial to the fabrication of graphene-based electrochemical devices. Here, we report a new approach for the scalable construction of laser-induced graphene (LIG) patterns on diverse substrates by using phenolic resin (PR) as the precursor. The PR-based LIG, which was produced with smart and inexpensive 405 nm semiconductor lasers under ambient conditions, possesses several interesting properties, e.g., 3D porous structures, low resistance (∼44 Ω/sq), good mechanical property and a wide range of applicable substrates, e.g., polymer films, glass slides, metal foils, ceramic plates and plant leaves. The efficient absorption of laser light by PR coatings themselves or dopants such as metal salts and organic dyes is demonstrated critical to the formation of PR-based LIG by visible light lasers. Based on this technique, self-designed and highly conductive graphene arrays can be easily constructed on various substrates to fabricate all-carbon supercapacitors and electrochemical glucose biosensors. The unique properties of PR materials, including easy synthesis, tunable structure and composition, excellent film-formation ability and extremely low cost, thus foresee the promising applications of PR-based LIG in electrochemical fields.

    更新日期:2017-11-10
  • Robust, hydrophilic graphene/cellulose nanocrystal fiber-based electrode with high capacitive performance and conductivity
    Carbon (IF 6.337) Pub Date : 2017-11-06
    Guoyin Chen, Tao Chen, Kai Hou, Wujun Ma, Mike Tebyetekerwa, Yanhua Cheng, Wei Weng, Meifang Zhu

    Graphene fiber-based electrodes for supercapacitors are promising candidates for wearable energy storage. Their main limitation, although, is the low electrochemical performance caused by the restacking of graphene sheets and their hydrophobicity to electrolytes. Incorporation of nanofillers into graphene is an efficient way to overcome the challenges, however, often leading to a sever deterioration in their mechanical property and/or conductivity, thus significantly influences the practical applications and rate performance of the device. Herein, an approach of fabricating hybrid fibers from graphene oxide (GO) and cellulose nanocrystal (CNC) via non-liquid-crystal spinning and followed by chemical reduction is presented to collectively work around the problems. The resultant hybrid GO/CNC fibers demonstrated a high capacitive performance, enhanced mechanical property, and improved hydrophilicity simultaneously. Furthermore, the conductivity kept at a high value. Sample with a GO/CNC weight ratio of 100/20 possessed a high capacitance of 208.2 F cm−3, a strength of 199.8 MPa, a contact angle of 63.3°, and conductivity of 64.7 S cm−1. Moreover, the supercapacitor assembled from this fiber exhibited a high energy density and power density (5.1 mW h cm−3 and 496.4 mW cm−3), excellent flexibility and bending stability, which has a great potential for using as flexible power storage.

    更新日期:2017-11-10
  • Water adsorption on the diamond (111) surfaces: An ab initio study
    Carbon (IF 6.337) Pub Date : 2017-11-06
    Giacomo Levita, Seiji Kajita, Maria Clelia Righi

    The physical and chemical adsorptions of water at the (1 × 1) and (2 × 1)-reconstructed C(111) surfaces are investigated by means of first principles calculations and compared to hydrogen adsorption. The study aims at filling a gap of knowledge about the interaction of water with the most stable diamond surface. The calculated reaction energies and barriers indicate that the Pandey-reconstructed surface is almost inert towards water and hydrogen chemisorption in comparison with the unreconstructed surface and other low-index diamond surfaces. We also show that by increasing the amount of chemisorbed hydroxyl or hydrogen groups the stability of the Pandey reconstruction is progressively reduced with respect to the unreconstructed (111) surface, which becomes energetically more favourable above about 40% of adsorbate coverage. Our results provide a microscopic description of diamond surface passivation, which is very important for controlling macroscale phenomena, such as the friction reduction of diamond coatings in humid environments.

    更新日期:2017-11-10
  • Investigation of dispersion behavior of GO modified by different water reducing agents in cement pore solution
    Carbon (IF 6.337) Pub Date : 2017-11-05
    Li Zhao, Xinli Guo, Yuanyuan Liu, Chuang Ge, Zhongtao Chen, Liping Guo, Xin Shu, Jiaping Liu
    更新日期:2017-11-05
  • Defect-mediated, thermally-activated encapsulation of metals at the surface of graphite
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Yinghui Zhou, Ann Lii-Rosales, Minsung Kim, Mark Wallingford, Dapeng Jing, Michael C. Tringides, Cai-Zhuang Wang, P.A. Thiel
    更新日期:2017-11-05
  • Environmental aging and degradation of multiwall carbon nanotube reinforced polypropylene
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Changseok Han, E. Sahle-Demessie, Amy Zhao, Teri’ Richardson, Jun Wang
    更新日期:2017-11-05
  • Luminescent hybrid materials based on nanodiamonds
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Dongxue Zhang, Qi Zhao, Jinhao Zang, Ying-Jie Lu, Lin Dong, Chong-Xin Shan
    更新日期:2017-11-05
  • Graphene-decorated carbon-coated LiFePO4 nanospheres as a high-performance cathode material for lithium-ion batteries
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Xufeng Wang, Zhijun Feng, Juntong Huang, Wen Deng, Xibao Li, Huasen Zhang, Zhenhai Wen
    更新日期:2017-11-05
  • Pseudocapacitive anthraquinone modified with reduced graphene oxide for flexible symmetric all-solid-state supercapacitors
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Lei Xu, Ruiying Shi, Hongfei Li, Cuiping Han, Mengyao Wu, Ching-Ping Wong, Feiyu Kang, Baohua Li
    更新日期:2017-11-05
  • Hexagonal rotator order of bound ionic surfactants and temperature triggered dispersion of carbon nanotubes
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Mario Maggio, Rosamaria Marrazzo, Maria Rosaria Acocella, Veronica Granata, Gaetano Guerra
    更新日期:2017-11-05
  • Electrochemically exfoliated high-yield graphene in ambient temperature molten salts and its application for flexible solid-state supercapacitors
    Carbon (IF 6.337) Pub Date : 2017-11-04
    Yuan Zhang, Youlong Xu, Jianbo Zhu, Long Li, Xianfeng Du, Xiaofei Sun
    更新日期:2017-11-05
  • Nitrogen-doped porous carbon with well-balanced charge conduction and electrocatalytic activity for dye-sensitized solar cells
    Carbon (IF 6.337) Pub Date : 2017-11-03
    Nan Xiao, Junwei Song, Yuwei Wang, Chang Liu, Ying Zhou, Zhiqiang Liu, Mingyu Li, Jieshan Qiu

    Nitrogen-doped porous carbon with well-balanced charge conduction and electrocatalytic activity were synthesized from nitrogen-rich pitch by hard-template method. The sample carbonized at 900 °C possessing high nitrogen content (7.11 wt.%) and large specific surface area exhibits high electrocatalytic activity in dye-sensitized solar cells. A fast charge conduction involving facile ion transport and rapid electron transfer can be attributed to the open framework structure and soft carbon nature of pitch derived porous carbon, respectively. Owing to these merits, the nitrogen-doped porous carbon delivers higher power conversion efficiency (8.75%) than that of the commercial Pt electrode (7.55%).

    更新日期:2017-11-05
  • Comment on “Carbon structure in nanodiamonds elucidated from Raman Spectroscopy” by V.I. Korepanov et al
    Carbon (IF 6.337) Pub Date : 2017-11-03
    V.Yu. Osipov, A.M. Panich, A.V. Baranov

    In the recent study, V.I. Korepanov et al. [1] reported on Raman spectroscopy study of the structure of nanodiamonds. They claimed that the Raman spectroscopy provides unique quantitative tool for nanodiamond characterization and determination of the relative content of carbon atoms belonging to the diamond core, disordered shell and graphene-like phases. There are several issues in this research that we must comment on.

    更新日期:2017-11-05
  • First principles study of magnetism induced by topological frustration of bowtie-shaped graphene nanoflake
    Carbon (IF 6.337) Pub Date : 2017-11-03
    Yang Ge, Jianlong Ji, Zhizhong Shen, Qiang Zhang, Aoqun Jian, Qianqian Duan, Chao Wang, Jun Jiang, Wendong Zhang, Shengbo Sang
    更新日期:2017-11-05
  • Carbon layer-exfoliated, wettability-enhanced, SO3H-functionalized carbon paper: a superior positive electrode for vanadium redox flow battery
    Carbon (IF 6.337) Pub Date : 2017-11-03
    Yingqiao Jiang, Zhangxing He, Yuehua Li, Jing Zhu, Huizhu Zhou, Wei Meng, Ling Wang, Lei Dai
    更新日期:2017-11-05
  • Beyond the classical kinetic model for chronic graphite oxidation by moisture in high temperature gas-cooled reactors
    Carbon (IF 6.337) Pub Date : 2017-11-03
    Cristian I. Contescu, Robert W. Mee, Yoonjo (Jo Jo) Lee, José D. Arregui-Mena, Nidia C. Gallego, Timothy D. Burchell, Joshua J. Kane, William E. Windes
    更新日期:2017-11-05
  • Multi-Functionalization of GO with multi-cationic ILs as high efficient metal-free catalyst for CO2 cycloaddition under mild conditions
    Carbon (IF 6.337) Pub Date : 2017-11-03
    Dong-Hui Lan, Yan-Xi Gong, Nian-Yuan Tan, Shui-Sheng Wu, Jing Shen, Kui-Cheng Yao, Bing Yi, Chak-Tong Au, Shuang-Feng Yin
    更新日期:2017-11-05
  • 更新日期:2017-11-03
  • 更新日期:2017-11-03
  • Direct observation of oxygen configuration on individual graphene oxide sheets
    Carbon (IF 6.337) Pub Date : 2017-11-02
    Zilong Liu, Kasper Nørgaard, Marc H. Overgaard, Marcel Ceccato, David Mackenzie, Nicolas Stenger, Susan L.S. Stipp, Tue Hassenkam
    更新日期:2017-11-02
  • Preparation mechanism of hierarchical layered structure of graphene/copper composite with ultrahigh tensile strength
    Carbon (IF 6.337) Pub Date : 2017-11-02
    Ziyue Yang, Lidong Wang, Zhendong Shi, Miao Wang, Ye Cui, Bing Wei, Shichong Xu, Yunpeng Zhu, Weidong Fei
    更新日期:2017-11-02
  • Plasma modification of vertically aligned carbon nanotubes: Superhydrophobic surfaces with ultra-low reflectance
    Carbon (IF 6.337) Pub Date : 2017-11-02
    Christopher S. Yung, Nathan A. Tomlin, Karl Heuerman, Mark W. Keller, Malcolm G. White, Michelle Stephens, John H. Lehman
    更新日期:2017-11-02
  • Characteristics and Formation Mechanism of Compact/Porous Structures in Char Layers of EPDM Insulation Materials
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Jiang Li, Kun Xi, Xiang Lv, Qiang Li, Shu-xian Wang
    更新日期:2017-11-02
  • Largely enhanced thermal conductivity of graphene/copper composites with highly aligned graphene network
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Ke Chu, Xiao-hu Wang, Fan Wang, Yu-biao Li, Da-jian Huang, Hong Li, Wen-lin Ma, Feng-xia Liu, Hu Zhang
    更新日期:2017-11-02
  • Effect of gaseous and condensate products of ethanol decomposition on aerosol CVD synthesis of single-walled carbon nanotubes
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Sergey D. Shandakov, Alexey V. Kosobutsky, Mikhail S. Rybakov, Oleg G. Sevostyanov, Dmitriy M. Russakov, Maksim V. Lomakin, Anna I. Vershinina, Irina M. Chirkova
    更新日期:2017-11-02
  • Graphene integrating carbon fiber and hierarchical porous carbon formed robust flexible “carbon-concrete” supercapacitor film
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Huinian Zhang, Anni Li, Jie Wang, Yan Zhang, Zheng Zhao, Huifang Zhao, Miao Cheng, Congwei Wang, Junying Wang, Shouchun Zhang, Junzhong Wang
    更新日期:2017-11-02
  • Inhibition of CYP2C8 by metallofullerenol Gd@C82(OH)22 through blocking substrate channels and substrate recognition sites
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Dongfang Ma, Xuan-Yu Meng, David R. Bell, Shengtang Liu, Ruhong Zhou
    更新日期:2017-11-02
  • Adsorption of atomic hydrogen on defect sites of graphite: Influence of surface reconstruction and irradiation damage
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Christoph Lechner, Philippe Baranek, Holger Vach
    更新日期:2017-11-02
  • Sub-μm c-axis Structural Domain Size of Graphene Paper Uncovered by Low-momentum Phonon Scattering
    Carbon (IF 6.337) Pub Date : 2017-11-01
    Meng Han, Jing Liu, Yangsu Xie, Xinwei Wang
    更新日期:2017-11-02
  • 更新日期:2017-11-01
  • Fluorine-graphite intercalation compound (C4F)n at high pressure: Experimental and theoretical study
    Carbon (IF 6.337) Pub Date : 2017-10-31
    V. Pischedda, S. Radescu, M. Dubois, C. Cavallari, N. Batisse, F. Balima
    更新日期:2017-11-01
  • Size-dependent cell uptake of carbon nanotubes by macrophages: A comparative and quantitative study
    Carbon (IF 6.337) Pub Date : 2017-10-31
    Minfang Zhang, Mei Yang, Takahiro Morimoto, Naoko Tajima, Kayo Ichiraku, Katsuhide Fujita, Sumio Iijima, Masako Yudasaka, Toshiya Okazaki
    更新日期:2017-11-01
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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