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Application of MXenes in environmental remediation technologies Nano Convergence (IF 2.919) Pub Date : 2021-02-17 Mawada Mohammed Tunesi; Razium Ali Soomro; Xi Han; Qizhen Zhu; Yi Wei; Bin Xu
MXenes have recently been recognized as potential materials based on their unique physical and chemical characteristics. The widely growing family of MXenes is rapidly expanding their application domains since their first usage as energy materials was reported in 2011. The inherent chemical nature, high hydrophilicity, and robust electrochemistry regard MXenes as a promising avenue for environment-remediation
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Hydrogen production from water electrolysis: role of catalysts Nano Convergence (IF 2.919) Pub Date : 2021-02-11 Shan Wang; Aolin Lu; Chuan-Jian Zhong
As a promising substitute for fossil fuels, hydrogen has emerged as a clean and renewable energy. A key challenge is the efficient production of hydrogen to meet the commercial-scale demand of hydrogen. Water splitting electrolysis is a promising pathway to achieve the efficient hydrogen production in terms of energy conversion and storage in which catalysis or electrocatalysis plays a critical role
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Real-time monitoring of liver fibrosis through embedded sensors in a microphysiological system Nano Convergence (IF 2.919) Pub Date : 2021-02-02 Hafiz Muhammad Umer Farooqi; Bohye Kang; Muhammad Asad Ullah Khalid; Abdul Rahim Chethikkattuveli Salih; Kinam Hyun; Sung Hyuk Park; Dongeun Huh; Kyung Hyun Choi
Hepatic fibrosis is a foreshadowing of future adverse events like liver cirrhosis, liver failure, and cancer. Hepatic stellate cell activation is the main event of liver fibrosis, which results in excessive extracellular matrix deposition and hepatic parenchyma's disintegration. Several biochemical and molecular assays have been introduced for in vitro study of the hepatic fibrosis progression. However
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PEO based polymer-ceramic hybrid solid electrolytes: a review Nano Convergence (IF 2.919) Pub Date : 2021-01-10 Jingnan Feng; Li Wang; Yijun Chen; Peiyu Wang; Hanrui Zhang; Xiangming He
Compared with traditional lead-acid batteries, nickel–cadmium batteries and nickel-hydrogen batteries, lithium-ion batteries (LIBs) are much more environmentally friendly and much higher energy density. Besides, LIBs own the characteristics of no memory effect, high charging and discharging rate, long cycle life and high energy conversion rate. Therefore, LIBs have been widely considered as the most
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Metal–organic framework derived nanomaterials for electrocatalysis: recent developments for CO2 and N2 reduction Nano Convergence (IF 2.919) Pub Date : 2021-01-05 Chanderpratap Singh; Subhabrata Mukhopadhyay; Idan Hod
In recent years, we are witnessing a substantially growing scientific interest in MOFs and their derived materials in the field of electrocatalysis. MOFs acting as a self-sacrificing template offer various advantages for the synthesis of carbon-rich materials, metal oxides, and metal nanostructures containing graphitic carbon-based materials benefiting from the high surface area, porous structure,
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Recent advances in nanomaterial-modified electrical platforms for the detection of dopamine in living cells Nano Convergence (IF 2.919) Pub Date : 2020-12-22 Yeon-Woo Cho; Joon-Ha Park; Kwang-Ho Lee; Taek Lee; Zhengtang Luo; Tae-Hyung Kim
Dopamine is a key neurotransmitter that plays essential roles in the central nervous system, including motor control, motivation, arousal, and reward. Thus, abnormal levels of dopamine directly cause several neurological diseases, including depressive disorders, addiction, and Parkinson’s disease (PD). To develop a new technology to treat such diseases and disorders, especially PD, which is currently
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Electrochemical H2O2 biosensor based on horseradish peroxidase encapsulated protein nanoparticles with reduced graphene oxide-modified gold electrode Nano Convergence (IF 2.919) Pub Date : 2020-12-16 Jeong-Hyeop Shin; Myeong-Jun Lee; Jin-Ha Choi; Ji-ae Song; Tae-Hwan Kim; Byung-Keun Oh
In this study, an electrochemical biosensor composed of a horseradish peroxidase (HRP)-encapsulated protein nanoparticles (HEPNP) was fabricated for the sensitive and selective detection of H2O2. The HEPNP has a three-dimensional structure that can contain a large amount of HRP; therefore, HEPNP can amplify the electrochemical signals necessary for the detection of H2O2. Furthermore, reduced graphene
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Nano drug delivery systems in upper gastrointestinal cancer therapy Nano Convergence (IF 2.919) Pub Date : 2020-12-10 Julia Salapa; Allison Bushman; Kevin Lowe; Joseph Irudayaraj
Upper gastrointestinal (GI) carcinomas are characterized as one of the deadliest cancer types with the highest recurrence rates. Their treatment is challenging due to late diagnosis, early metastasis formation, resistance to systemic therapy and complicated surgeries performed in poorly accessible locations. Current cancer medication face deficiencies such as high toxicity and systemic side-effects
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Immobilization of molecular catalysts for artificial photosynthesis Nano Convergence (IF 2.919) Pub Date : 2020-11-30 Dong Ryeol Whang
Artificial photosynthesis offers a way of producing fuels or high-value chemicals using a limitless energy source of sunlight and abundant resources such as water, CO2, and/or O2. Inspired by the strategies in natural photosynthesis, researchers have developed a number of homogeneous molecular systems for photocatalytic, photoelectrocatalytic, and electrocatalytic artificial photosynthesis. However
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Heavy metal removal applications using adsorptive membranes Nano Convergence (IF 2.919) Pub Date : 2020-11-16 Thi Sinh Vo; Muhammad Mohsin Hossain; Hyung Mo Jeong; Kyunghoon Kim
Water is a significant natural resource for humans. As such, wastewater containing heavy metals is seen as a grave problem for the environment. Currently, adsorption is one of the common methods used for both water purification and wastewater treatment. Adsorption relies on the physical and chemical interactions between heavy metal ions and adsorbents. Adsorptive membranes (AMs) have demonstrated high
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Ultrafast optical manipulation of magnetic order in ferromagnetic materials Nano Convergence (IF 2.919) Pub Date : 2020-11-10 Chuangtang Wang; Yongmin Liu
The interaction between ultrafast lasers and magnetic materials is an appealing topic. It not only involves interesting fundamental questions that remain inconclusive and hence need further investigation, but also has the potential to revolutionize data storage technologies because such an opto-magnetic interaction provides an ultrafast and energy-efficient means to control magnetization. Fruitful
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Regulation of intracellular transition metal ion level with a pH-sensitive inorganic nanocluster to improve therapeutic angiogenesis by enriching conditioned medium retrieved from human adipose derived stem cells Nano Convergence (IF 2.919) Pub Date : 2020-10-16 Yeong Hwan Kim; Euiyoung Jung; Gwang-Bum Im; Yu-Jin Kim; Sung-Won Kim; Gun-Jae Jeong; Young Charles Jang; Kyung Min Park; Dong-Ik Kim; Taekyung Yu; Suk Ho Bhang
Cell therapy based on human adipose derived stem cells (hADSCs) is a known potential therapeutic approach to induce angiogenesis in ischemic diseases. However, the therapeutic efficacy of direct hADSC injection is limited by a low cell viability and poor cell engraftment after administration. To improve the outcomes of this kind of approach, various types of nanoparticles have been utilized to improve
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High-performance printed electronics based on inorganic semiconducting nano to chip scale structures Nano Convergence (IF 2.919) Pub Date : 2020-10-09 Abhishek Singh Dahiya; Dhayalan Shakthivel; Yogeenth Kumaresan; Ayoub Zumeit; Adamos Christou; Ravinder Dahiya
The Printed Electronics (PE) is expected to revolutionise the way electronics will be manufactured in the future. Building on the achievements of the traditional printing industry, and the recent advances in flexible electronics and digital technologies, PE may even substitute the conventional silicon-based electronics if the performance of printed devices and circuits can be at par with silicon-based
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Perovskite oxides as transparent semiconductors: a review Nano Convergence (IF 2.919) Pub Date : 2020-10-02 Haiying He; Zhihao Yang; Yonghang Xu; Andrew T. Smith; Guangguang Yang; Luyi Sun
Traditional transparent conducting oxides (TCOs) have been widely used for various optoelectronic applications, but have the trade-off between conductivity and transmittance. Recently, perovskite oxides, with structural and chemical stability, have exhibited excellent physical properties as new TCOs. We focus on SrVO3-based perovskites with a high carrier concentration and BaSnO3-based perovskites
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Double-gate thin film transistor with suspended-gate applicable to tactile force sensor. Nano Convergence (IF 2.919) Pub Date : 2020-09-15 An Hoang-Thuy Nguyen,Manh-Cuong Nguyen,Seongyong Cho,Anh-Duy Nguyen,Hyewon Kim,Yeongcheol Seok,Jiyeon Yoon,Rino Choi
This paper presents a straightforward, low-cost, and effective integration process for the fabrication of membrane gate thin film transistors (TFTs) with an air gap. The membrane gate TFT with an air gap can be used as the highly sensitive tactile force sensor. The suspended membrane gate with an air gap as the insulator layer is formed by multiple photolithography steps and photoresist sacrificial
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Overcoming anticancer resistance by photodynamic therapy-related efflux pump deactivation and ultrasound-mediated improved drug delivery efficiency. Nano Convergence (IF 2.919) Pub Date : 2020-09-08 Doyeon Kim,Suhyun Park,Hongkeun Yoo,Suhyeon Park,Jeewon Kim,Kyuhee Yum,Kwangmeyung Kim,Hyuncheol Kim
One of the major obstacles to successful chemotherapy is multi-drug resistance (MDR). A multi-drug resistant cancerous cell abnormally overexpresses membrane transporters that pump anticancer drugs out of the cell, resulting in low anticancer drug delivery efficiency. To overcome the limitation, many attempts have been performed to inhibit the abilities of efflux receptors chemically or genetically
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Flexible nanopillar-based immunoelectrochemical biosensor for noninvasive detection of Amyloid beta. Nano Convergence (IF 2.919) Pub Date : 2020-09-01 Yoo Min Park,Junhyoung Ahn,Young Sun Choi,Jae-Min Jeong,Seok Jae Lee,Jae Jong Lee,Bong Gill Choi,Kyoung G Lee
The noninvasive early detection of biomarkers for Alzheimer’s disease (AD) is essential for the development of specific treatment strategies. This paper proposes an advanced method for fabricating highly ordered and flexible nanopillar-based electrochemical biosensors by the combination of soft/photolithography and metal evaporation. The nanopillar array (NPA) exhibits high surface area containing
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Air-stable and ultrasensitive solution-cast SWIR photodetectors utilizing modified core/shell colloidal quantum dots. Nano Convergence (IF 2.919) Pub Date : 2020-08-17 Jin-Beom Kwon,Sae-Wan Kim,Byoung-Ho Kang,Se-Hyuk Yeom,Wang-Hoon Lee,Dae-Hyuk Kwon,Jae-Sung Lee,Shin-Won Kang
InGaAs-based photodetectors have been generally used for detection in the short-wave infrared (SWIR) region. However, the epitaxial process used to grow these materials is expensive; therefore, InGaAs-based photodetectors are limited to space exploration and military applications. Many researchers have expended considerable efforts to address the problem of SWIR photodetector development using lead
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Graphene impregnated electrospun nanofiber sensing materials: a comprehensive overview on bridging laboratory set-up to industry. Nano Convergence (IF 2.919) Pub Date : 2020-08-10 Adel Mohammed Al-Dhahebi,Subash Chandra Bose Gopinath,Mohamed Shuaib Mohamed Saheed
Owing to the unique structural characteristics as well as outstanding physio–chemical and electrical properties, graphene enables significant enhancement with the performance of electrospun nanofibers, leading to the generation of promising applications in electrospun-mediated sensor technologies. Electrospinning is a simple, cost-effective, and versatile technique relying on electrostatic repulsion
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Deep Q-network to produce polarization-independent perfect solar absorbers: a statistical report. Nano Convergence (IF 2.919) Pub Date : 2020-08-03 Iman Sajedian,Trevon Badloe,Heon Lee,Junsuk Rho
Using reinforcement learning, a deep Q-network was used to design polarization-independent, perfect solar absorbers. The deep Q-network selected the geometrical properties and materials of a symmetric three-layer metamaterial made up of circular rods on top of two films. The combination of all the possible permutations gives around 500 billion possible designs. In around 30,000 steps, the deep Q-network
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Growth of centimeter-scale perovskite single-crystalline thin film via surface engineering. Nano Convergence (IF 2.919) Pub Date : 2020-07-20 Yu-Hao Deng,Zhen-Qian Yang,Ren-Min Ma
Modern electronic and photonic devices rely on single-crystalline thin film semiconductors for high performance and reproducibility. The emerging halide perovskites have extraordinary electronic and photonic properties and can be synthesized via low cost solution-based methods. They have been used in a variety of devices with performance approaching or over the devices based on conventional materials
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Low-temperature large-area fabrication of ZnO nanowires on flexible plastic substrates by solution-processible metal-seeded hydrothermal growth. Nano Convergence (IF 2.919) Pub Date : 2020-07-13 Kangeun Yoo,Wonseok Lee,Kyungnam Kang,Inhwan Kim,Daehun Kang,Dong Kyo Oh,Min Cheol Kim,Hyunsik Choi,Kwangjun Kim,Minwook Kim,Jeong Dae Kim,Inkyu Park,Jong G Ok
We have developed the low-temperature conformal ZnO nanowire fabrication on flexible plastic substrates by utilizing the solution-processible metal seed-assisted hydrothermal ZnO crystallization. Structural evolution of ZnO nanowires controlled by major parameters involving growth temperature, growth time, and seed coating condition, has been systematically investigated towards uniform and large-area
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Laser digital patterning of conductive electrodes using metal oxide nanomaterials. Nano Convergence (IF 2.919) Pub Date : 2020-07-06 Vu Binh Nam,Trinh Thi Giang,Sangmo Koo,Junsuk Rho,Daeho Lee
As an alternative approach to the conventional deposition and photolithographic processes, the laser digital patterning (LDP) process, which is also known as the laser direct writing process, has attracted considerable attention because it is a non-photolithographic, non-vacuum, on-demand, and cost-effective electrode fabrication route that can be applied to various substrates, including heat-sensitive
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Low temperature CO oxidation by doped cerium oxide electrospun fibers. Nano Convergence (IF 2.919) Pub Date : 2020-06-29 Myeongseok Sim,Buhua Wang,Tae-Sik Oh
We investigated CO oxidation behavior of doped cerium oxide fibers. Electrospinning technique was used to fabricate the inorganic fibers after burning off polymer component at 600 °C in air. Cu, Ni, Co, Mn, Fe, and La were doped at 10 and 30 mol% by dissolving metal salts into the polymeric electrospinning solution. 10 mol% Cu-doped ceria fiber showed excellent catalytic activity for low temperature
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A polymeric composite protective layer for stable Li metal anodes. Nano Convergence (IF 2.919) Pub Date : 2020-06-15 Suogang Guo,Li Wang,Yuhong Jin,Nan Piao,Zonghai Chen,Guangyu Tian,Jiangang Li,Chenchen Zhao,Xiangming He
Lithium (Li) metal is a promising anode for high-performance secondary lithium batteries with high energy density due to its highest theoretical specific capacity and lowest electrochemical potential among anode materials. However, the dendritic growth and detrimental reactions with electrolyte during Li plating raise safety concerns and lead to premature failure. Herein, we report that a homogeneous
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Magnetic and near-infrared derived heating characteristics of dimercaptosuccinic acid coated uniform Fe@Fe3O4 core-shell nanoparticles. Nano Convergence (IF 2.919) Pub Date : 2020-06-08 Changhyuk Koo,Hwichan Hong,Pyung Won Im,Hoonsub Kim,Chaedong Lee,Xuanzhen Jin,Bingyi Yan,Wooseung Lee,Hyung-Jun Im,Sun Ha Paek,Yuanzhe Piao
Among the number of hyperthermia materials, magnetic nanoparticles have received much attention. In this work, we studied the heating characteristics of uniform Fe@Fe3O4 core–shell nanoparticle under near-infrared laser irradiation and external AC magnetic field applying. The Fe@Fe3O4 core–shell nanoparticles were prepared by thermal decomposition of iron pentacarbonyl and followed by controlled oxidation
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Study of a hysteresis window of FinFET and fully-depleted silicon-on-insulator (FDSOI) MOSFET with ferroelectric capacitor. Nano Convergence (IF 2.919) Pub Date : 2020-06-01 Chankeun Yoon,Seungjun Moon,Changhwan Shin
In this work, the measured electrical characteristics of a fully depleted silicon-on-insulator (FDSOI) device and fin-shaped field-effect transistor (FinFET), whose gate electrode is connected in series to the bottom electrode of a ferroelectric capacitor (FE-FDSOI/FE-FinFET), are experimentally studied. The hysteretic property in input transfer characteristic of those devices is desirable for memory
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Soft optical metamaterials. Nano Convergence (IF 2.919) Pub Date : 2020-05-26 Yixin Chen,Bin Ai,Zi Jing Wong
Optical metamaterials consist of artificially engineered structures exhibiting unprecedented optical properties beyond natural materials. Optical metamaterials offer many novel functionalities, such as super-resolution imaging, negative refraction and invisibility cloaking. However, most optical metamaterials are comprised of rigid materials that lack tunability and flexibility, which hinder their
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Progressive lysosomal membrane permeabilization induced by iron oxide nanoparticles drives hepatic cell autophagy and apoptosis. Nano Convergence (IF 2.919) Pub Date : 2020-05-19 Kateryna Levada,Stanislav Pshenichnikov,Alexander Omelyanchik,Valeria Rodionova,Aleksey Nikitin,Alexander Savchenko,Igor Schetinin,Dmitry Zhukov,Maxim Abakumov,Alexander Majouga,Mariia Lunova,Milan Jirsa,Barbora Smolková,Mariia Uzhytchak,Alexandr Dejneka,Oleg Lunov
Iron oxide nanoparticles (IONs) are frequently used in various biomedical applications, in particular as magnetic resonance imaging contrast agents in liver imaging. Indeed, number of IONs have been withdrawn due to their poor clinical performance. Yet comprehensive understanding of their interactions with hepatocytes remains relatively limited. Here we investigated how iron oxide nanocubes (IO-cubes)
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Inner structure- and surface-controlled hollow MnO nanocubes for high sensitive MR imaging contrast effect. Nano Convergence (IF 2.919) Pub Date : 2020-05-12 Aastha Kukreja,Byunghoon Kang,Seungmin Han,Moo-Kwang Shin,Hye Young Son,Yuna Choi,Eun-Kyung Lim,Yong-Min Huh,Seungjoo Haam
Manganese oxide (MnO) nanocubes were fabricated and their surface were modified by ligand encapsulation or ligand exchange, to render them water-soluble. And then, MnO formed the hollow structure by etching using acidic solution (phthalate buffer, pH 4.0). Depending on the ligand of the MnO surface, it increases the interaction between MnO and water molecules. Also, the hollow structure of MnO, as
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Nanosheet composed of gold nanoparticle/graphene/epoxy resin based on ultrasonic fabrication for flexible dopamine biosensor using surface-enhanced Raman spectroscopy. Nano Convergence (IF 2.919) Pub Date : 2020-05-05 Mahmoud A Hussein,Waleed A El-Said,Bahaa M Abu-Zied,Jeong-Woo Choi
Construction of a fast, easy and sensitive neurotransmitters-based sensor could provide a promising way for the diagnosis of neurological diseases, leading to the discovery of more effective treatment methods. The current work is directed to develop for the first time a flexible Surface-Enhanced Raman Spectroscopy (SERS) based neurotransmitters sensor by using the ultrasonic-assisted fabrication of
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Lipid-coated ZnO nanoparticles synthesis, characterization and cytotoxicity studies in cancer cell. Nano Convergence (IF 2.919) Pub Date : 2020-04-23 Dingding Cao,Xugang Shu,Dandan Zhu,Shengli Liang,Murtaza Hasan,Sheng Gong
ZnO nanoparticles are widely used in biological, chemical, and medical fields, but their toxicity impedes their wide application. In this study, pristine ZnO NPs (~ 7 nm; ~ 18 nm; ~ 49 nm) and lipid-coated ZnO NPs (~ 13 nm; ~ 22 nm; ~ 52 nm) with different morphologies were prepared by chemical method and characterized by TEM, XRD, HRTEM, FTIR, and DLS. Our results showed that the lipid-coated ZnO
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Simple, rapid, and accurate malaria diagnostic platform using microfluidic-based immunoassay of Plasmodium falciparum lactate dehydrogenase Nano Convergence (IF 2.919) Pub Date : 2020-04-11 Wang Sik Lee; Taejoon Kang; Kyung Jin Kwak; Kyoungsook Park; So Yeon Yi; Ui Jin Lee; Yong Beom Shin; Jinyoung Jeong
This work reports on a rapid diagnostic platform for the detection of Plasmodium falciparum lactate dehydrogenase (PfLDH), a representative malaria biomarker, using a microfluidic microplate-based immunoassay. In this study, the microfluidic microplate made it possible to diagnose PfLDH with a small volume of sample (only 5 μL) and short time (< 90 min) compared to conventional immunoassays such as
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Progress of infrared guided-wave nanophotonic sensors and devices. Nano Convergence (IF 2.919) Pub Date : 2020-04-02 Yiming Ma,Bowei Dong,Chengkuo Lee
Nanophotonics, manipulating light–matter interactions at the nanoscale, is an appealing technology for diversified biochemical and physical sensing applications. Guided-wave nanophotonics paves the way to miniaturize the sensors and realize on-chip integration of various photonic components, so as to realize chip-scale sensing systems for the future realization of the Internet of Things which requires
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Electrochemical activity of Samarium on starch-derived porous carbon: rechargeable Li- and Al-ion batteries Nano Convergence (IF 2.919) Pub Date : 2020-03-18 Kaiqiang Zhang; Tae Hyung Lee; Min-Ju Choi; Araz Rajabi-Abhari; Seokhoon Choi; Kyung Soon Choi; Rajender S. Varma; Ji-Won Choi; Ho Won Jang; Mohammadreza Shokouhimehr
Rechargeable metal-ion batteries are considered promising electric storage systems to meet the emerging demand from electric vehicles, electronics, and electric grids. Thus far, secondary Li-ion batteries (LIBs) have seen great advances in terms of both their energy and their power density. However, safety issues remain a challenge. Therefore, rechargeable Al-ion batteries (AIBs) with a highly reliable
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rGO nanomaterial-mediated cancer targeting and photothermal therapy in a microfluidic co-culture platform Nano Convergence (IF 2.919) Pub Date : 2020-03-17 Seok Gyu Mun; Hyung Woo Choi; Jong Min Lee; Jae Hyun Lim; Jang Ho Ha; Min-Jung Kang; Eun-Joong Kim; Lifeng Kang; Bong Geun Chung
We developed the microfluidic co-culture platform to study photothermal therapy applications. We conjugated folic acid (FA) to target breast cancer cells using reduced graphene oxide (rGO)-based functional nanomaterials. To characterize the structure of rGO-based nanomaterials, we analyzed the molecular spectrum using UV–visible and Fourier-transform infrared spectroscopy (FT-IR). We demonstrated the
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Selective Soxhlets extraction to enhance solubility of newly-synthesized poly(indoloindole-selenophene vinylene selenophene) donor for photovoltaic applications Nano Convergence (IF 2.919) Pub Date : 2020-03-10 Jihyun Lim; Na Yeong Kim; Woongsik Jang; Un Su An; Aung Ko Ko Kyaw; Yun-Hi Kim; Dong Hwan Wang
An electron-rich fused indoloindole-based poly(indoloindole-selenophene vinylene selenophene) was synthesized and characterized. Soxhlet can be obtained by continuously purifying the product with a specific solvent and obtaining a pure polymer with a high concentration. Molecular weight is affected by the vapor pressure of marginal solvent, and the polymer was fractionated using tetrahydrofuran, chloroform
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Ultrathin MEMS thermoelectric generator with Bi2Te3/(Pt, Au) multilayers and Sb2Te3 legs. Nano Convergence (IF 2.919) Pub Date : 2020-03-03 Yang Liu,Erzhen Mu,Zhenhua Wu,Zhanxun Che,Fangyuan Sun,Xuecheng Fu,Fengdan Wang,Xinwei Wang,Zhiyu Hu
Multilayer structure is one of the research focuses of thermoelectric (TE) material in recent years. In this work, n-type 800 nm Bi2Te3/(Pt, Au) multilayers are designed with p-type Sb2Te3 legs to fabricate ultrathin microelectromechanical systems (MEMS) TE devices. The power factor of the annealed Bi2Te3/Pt multilayer reaches 46.5 μW cm−1 K−2 at 303 K, which corresponds to more than a 350% enhancement
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Gold nanoparticle clusters for the investigation of therapeutic efficiency against prostate cancer under near-infrared irradiation. Nano Convergence (IF 2.919) Pub Date : 2020-02-17 Jeonghun Kim,Sang Hun Chun,Lunjakorn Amornkitbamrung,Chanyoung Song,Ji Soo Yuk,So Yeon Ahn,Byung Woo Kim,Yong Taik Lim,Byung-Keun Oh,Soong Ho Um
Gold particles have been widely used in the treatment of prostate cancer due to their unique optical properties, such as their light-heat conversion in response to near-infrared radiation. Due to well-defined synthesis mechanisms and simple manufacturing methods, gold particles have been fabricated in various sizes and shapes. However, the low photothermal transduction efficiency in their present form
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TEPA impregnation of electrospun carbon nanofibers for enhanced low-level CO2 adsorption. Nano Convergence (IF 2.919) Pub Date : 2020-02-17 Jie Wang,Adedeji Adebukola Adelodun,Jong Min Oh,Young Min Jo
The CO2 adsorption selectivity of plain activated carbon nanofibers (ANF) is generally low. For enhancement, nitrogen functionalities favorable for CO2 adsorption are usually tethered to the ANF. In the current study, we adopted chemical impregnation using 0.5 wt% tetraethylenepentamine (TEPA) solution as an impregnant. To enhance the impregnation of TEPA further, preliminary oxidation of the nanofibers
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Recycling performance of graphene oxide-chitosan hybrid hydrogels for removal of cationic and anionic dyes Nano Convergence (IF 2.919) Pub Date : 2020-02-10 Thi Sinh Vo; Tran Thi Bich Chau Vo; Ji Won Suk; Kyunghoon Kim
Water is one of the most important resources for human survival and development. Efficient wastewater treatment techniques such as coagulation, filtration, ozonation, and reverse osmosis have been studied to remove toxic materials from water. Implementation of adsorption columns has been proven to be an efficient wastewater treatment method, particularly for the removal of organic contaminants. In
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High density lipoprotein mimicking nanoparticles for atherosclerosis. Nano Convergence (IF 2.919) Pub Date : 2020-01-27 Jun Chen,Xixi Zhang,Reid Millican,Jacob Emil Creutzmann,Sean Martin,Ho-Wook Jun
Atherosclerosis is a major contributor to many cardiovascular events, including myocardial infarction, ischemic stroke, and peripheral arterial disease, making it the leading cause of death worldwide. High-density lipoproteins (HDL), also known as “good cholesterol”, have been shown to demonstrate anti-atherosclerotic efficacy through the removal of cholesterol from foam cells in atherosclerotic plaques
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Tunable metasurfaces for visible and SWIR applications. Nano Convergence (IF 2.919) Pub Date : 2020-01-20 Chang-Won Lee,Hee Jin Choi,Heejeong Jeong
Demand on optical or photonic applications in the visible or short-wavelength infrared (SWIR) spectra, such as vision, virtual or augmented displays, imaging, spectroscopy, remote sensing (LIDAR), chemical reaction sensing, microscopy, and photonic integrated circuits, has envisaged new type of subwavelength-featured materials and devices for controlling electromagnetic waves. The study on metasurfaces
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Direct electrophoretic microRNA preparation from clinical samples using nanofilter membrane. Nano Convergence (IF 2.919) Pub Date : 2020-01-13 Kidan Lee,Jae-Hyun Kang,Hyun-Mi Kim,Junhyoung Ahn,Hyungjun Lim,JaeJong Lee,Wan-Jin Jeon,Jae-Hoon Lee,Ki-Bum Kim
A method to directly collect negatively charged nucleic acids, such as DNA and RNA, in the biosamples simply by applying an electric field in between the sample and collection buffer separated by the nanofilter membrane is proposed. The nanofilter membrane was made of low-stress silicon nitride with a thickness of 100 nm, and multiple pores were perforated in a highly arranged pattern using nanoimprint
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Hybrid material of structural DNA with inorganic compound: synthesis, applications, and perspective Nano Convergence (IF 2.919) Pub Date : 2020-01-06 Seung Won Shin; Ji Soo Yuk; Sang Hun Chun; Yong Taik Lim; Soong Ho Um
Owing to its precise manipulation in nanoscale, DNA as a genetic code becomes a promising and generic material in lots of nanotechnological outstanding exploitations. The nanoscale assembly of nucleic acids in aqueous solution has showed very remarkable capability that is not achievable from any other material resources. In the meantime, their striking role played by effective intracellular interactions
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NO2 sensing properties of WO3-decorated In2O3 nanorods and In2O3-decorated WO3 nanorods Nano Convergence (IF 2.919) Pub Date : 2019-12-13 Bumhee Nam; Tae-Kyoung Ko; Soong-Keun Hyun; Chongmu Lee
In2O3 nanoparticle (NP)-decorated WO3 nanorods (NRs) were prepared using sol–gel and hydrothermal methods. The In2O3 NRs and WO3 NPs were crystalline. WO3 NP-decorated In2O3 NRs were also prepared using thermal evaporation and hydrothermal methods. The NO2 sensing performance of the In2O3 NP-decorated WO3 NR sensor toward NO2 was compared to that of the WO3 NP-decorated In2O3 NR sensor. The former
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Detection of thioredoxin-1 using ultra-sensitive ELISA with enzyme-encapsulated human serum albumin nanoparticle Nano Convergence (IF 2.919) Pub Date : 2019-12-09 Myeong-Jun Lee; Eun-Sol Lee; Tae-Hwan Kim; Ju-Won Jeon; YongTae Kim; Byung-Keun Oh
Many methods for early diagnosis of the disease use biomarker tests, which measure indicators of biological state in body fluids or blood. However, a limitation of these methods is their low sensitivity to biomarkers. In this study, human serum albumin (HSA) based nanoparticles capable of encapsulating excess horseradish peroxidase (HRP) are synthesized and applied to the development of enzyme-linked
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Facile aqueous-phase synthesis of Ag-Cu-Pt-Pd quadrometallic nanoparticles. Nano Convergence (IF 2.919) Pub Date : 2019-12-02 Zengmin Tang,Byung Chul Yeo,Sang Soo Han,Tae-Jin Lee,Suk Ho Bhang,Woo-Sik Kim,Taekyung Yu
Ag–Cu–Pt–Pd quadrometallic nanoparticles which small Pt and Pd nanoparticles were attached on the surface of AgCu Janus nanoparticles were firstly synthesized by sequential reduction of Pt and Pd precursor in the presence of Janus AgCu bimetallic nanoparticles as seeds in an aqueous solution. Even though there was a small amount of Cu2O on the surface, the synthesized nanoparticles were mainly composed
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Multi-modal liquid biopsy platform for cancer screening: screening both cancer-associated rare cells and cancer cell-derived vesicles on the fabric filters for a reliable liquid biopsy analysis. Nano Convergence (IF 2.919) Pub Date : 2019-11-15 Jiyoon Bu,Jae-Eul Shim,Tae Hee Lee,Young-Ho Cho
Circulating tumor cells (CTCs) are receiving a great amount of scientific interest as a diagnostic biomarker for various types of cancer. Despite the recent progress in the development of highly sensitive CTC isolation devices, post-capture analysis of CTCs is still hindered by technical challenges associated with their rarity. Herein, we present a multi-modal CTC screening platform which is capable
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Current progress in application of polymeric nanofibers to tissue engineering. Nano Convergence (IF 2.919) Pub Date : 2019-11-08 Sorour Nemati,Se-Jeong Kim,Young Min Shin,Heungsoo Shin
Tissue engineering uses a combination of cell biology, chemistry, and biomaterials to fabricate three dimensional (3D) tissues that mimic the architecture of extracellular matrix (ECM) comprising diverse interwoven nanofibrous structure. Among several methods for producing nanofibrous scaffolds, electrospinning has gained intense interest because it can make nanofibers with a porous structure and high
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Fluorescent fullerene nanoparticle-based lateral flow immunochromatographic assay for rapid quantitative detection of C-reactive protein. Nano Convergence (IF 2.919) Pub Date : 2019-11-01 Kyung Mi Park,Da Jung Chung,Mijin Choi,Taejoon Kang,Jinyoung Jeong
A fluorescent fullerene nanoparticle (NP)-based lateral flow immunochromatographic assay (LFIA) was developed for the rapid and quantitative detection of C-reactive protein (CRP) in serum. The polyclonal CRP-antibody-conjugated fullerene NPs were simply prepared by 1-ethyl-3-(3-dimethyllaminopropyl)-carbodiimide hydrochloride coupling after carboxylation of fluorescent fullerene NPs. By applying the
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Highly sensitive and selective visual detection of Cr(VI) ions based on etching of silver-coated gold nanorods. Nano Convergence (IF 2.919) Pub Date : 2019-10-23 Dasom Kim,Eunjin Choi,Chaedong Lee,Yejung Choi,Hoonsub Kim,Taekyung Yu,Yuanzhe Piao
We report a visual detection of Cr(VI) ions using silver-coated gold nanorods (AuNR@Ag) as sensing probes. Au NRs were prepared by a seed-mediated growth process and AuNR@Ag nanostructures were synthesized by growing Ag nanoshells on Au NRs. Successful coating of Ag nanoshells on the surface of Au NRs was demonstrated with TEM, EDS, and UV–vis spectrometer. By increasing the overall amount of the deposited
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Study on ultra-high sensitivity piezoelectric effect of GaN micro/nano columns. Nano Convergence (IF 2.919) Pub Date : 2019-10-22 Jianbo Fu,Hua Zong,Xiaodong Hu,Haixia Zhang
High-quality GaN micro/nano columns were prepared with self-organized catalytic-free method. Young’s modulus of GaN nanocolumns were measured under both compressive stress and tensile stress. It was found that the Young’s modulus decreases with the increasing of nanocolumn diameter due to the increase of face defect density. Furthermore, we measured the piezoelectric properties and found that there
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Improved optical performance of multi-layer MoS2 phototransistor with see-through metal electrode. Nano Convergence (IF 2.919) Pub Date : 2019-10-02 Junghak Park,Dipjyoti Das,Minho Ahn,Sungho Park,Jihyun Hur,Sanghun Jeon
In recent years, MoS2 has emerged as a prime material for photodetector as well as phototransistor applications. Usually, the higher density of state and relatively narrow bandgap of multi-layer MoS2 give it an edge over monolayer MoS2 for phototransistor applications. However, MoS2 demonstrates thickness-dependent energy bandgap properties, with multi-layer MoS2 having indirect bandgap characteristics
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White light emitting diode based on purely organic fluorescent to modern thermally activated delayed fluorescence (TADF) and perovskite materials. Nano Convergence (IF 2.919) Pub Date : 2019-09-16 Dipjyoti Das,Peddaboodi Gopikrishna,Debasish Barman,Ramesh Babu Yathirajula,Parameswar Krishnan Iyer
White organic/polymer light emitting diode (WOLED/WPLED) processed from solution has attracted significant research interest in recent years due to their low device production cost, device flexibility, easy fabrication over large area including roll to roll and ability to print in various designs and shapes providing enormous design possibilities. Although WOLEDs fabricated using solution process lack
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Large area flexible pressure/strain sensors and arrays using nanomaterials and printing techniques. Nano Convergence (IF 2.919) Pub Date : 2019-09-09 Chithra Parameswaran,Dipti Gupta
Sensors are becoming more demanding in all spheres of human activities for their advancement in terms of fabrication and cost. Several methods of fabrication and configurations exist which provide them myriad of applications. However, the advantage of fabrication for sensors lies with bulk fabrication and processing techniques. Exhaustive study for process advancement towards miniaturization from the
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Facile synthesis of boronic acid-functionalized magnetic nanoparticles for efficient dopamine extraction. Nano Convergence (IF 2.919) Pub Date : 2019-09-02 Jeong Keun Kook,Viet-Duc Phung,Do-Yeong Koh,Sang-Wha Lee
Because dopamine (DA) is one of the most critical neurotransmitters that influence a wide variety of motivated human behaviors, it is necessary to develop a facile diagnostic tool that can quantify the physiological level. In this study, core–shell magnetic silica nanoparticles (Fe3O4@SiO2) were prepared using a modified sol–gel reaction. The Fe3O4@SiO2 were functionalized using 3-aminophenylboronic
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Accurate and instant frequency estimation from noisy sinusoidal waves by deep learning. Nano Convergence (IF 2.919) Pub Date : 2019-08-15 Iman Sajedian,Junsuk Rho
We used a deep learning network to find the frequency of a noisy sinusoidal wave. A three-layer neural network was designed to extract the frequency of sinusoidal waves that had been combined with white noise at a signal-to-noise ratio of 25 dB. One hundred thousand waves were prepared for training and testing the model. We designed a neural network that could achieve a mean squared error of 4 × 10−5
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Advances in self-healing supramolecular soft materials and nanocomposites. Nano Convergence (IF 2.919) Pub Date : 2019-08-15 Gurunathan Thangavel,Matthew Wei Ming Tan,Pooi See Lee
The ability to rationally tune and add new end-groups in polymers can lead to transformative advances in emerging self-healing materials. Self-healing networks manipulated by supramolecular strategies such as hydrogen bonding and metal coordination have received significant attention in recent years because of their ability to extend materials lifetime, improve safety and ensure sustainability. This
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Influence of indium-tin-oxide and emitting-layer thicknesses on light outcoupling of perovskite light-emitting diodes. Nano Convergence (IF 2.919) Pub Date : 2019-08-08 Young-Jin Jung,Seong-Yong Cho,Jee-Won Jung,Sei-Yong Kim,Jeong-Hwan Lee
Metal halide perovskite light-emitting diodes (PeLEDs) are emerging as a promising candidate for next-generation optoelectronic devices. The efficiency of PeLEDs has developed explosively in a short time, but their overall efficiency is still low. This is strongly related to the high refractive indexes of indium-tin-oxide (ITO) and perovskite emitting layers. Various outcoupling strategies are being
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