13,310 results match your criteria Nanotechnology [Journal]


UV LEDs based on p-i-n core-shell AlGaN/GaN nanowire heterostructures grown by N-polar selective area epitaxy.

Nanotechnology 2019 Feb 18. Epub 2019 Feb 18.

National Institute of Standards and Technology, Boulder, Colorado, UNITED STATES.

Ultraviolet light-emitting diodes (UV LEDs) fabricated from N-polar AlGaN/GaN core-shell nanowires with p-i-n structure produced electroluminescence at 365 nm with ~5x higher intensities than similar GaN homojunction LEDs. The improved characteristics were attributed to localization of spontaneous recombination to the nanowire core, reduction of carrier overflow losses through the nanowire shell, and elimination of current shunting. Poisson-drift-diffusion modeling indicated that a shell Al mole fraction of x=0. Read More

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http://dx.doi.org/10.1088/1361-6528/ab07edDOI Listing
February 2019

Recent progress in 2D Group IV-IV monochalcogenides : synthesis, properties, and applications.

Nanotechnology 2019 Feb 18. Epub 2019 Feb 18.

Nanjing University of Science and Technology, Nanjing 210094, China, Nanjing, Jiangsu, 210094, CHINA.

Not required at outline stage. Read More

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http://iopscience.iop.org/article/10.1088/1361-6528/ab07d9
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http://dx.doi.org/10.1088/1361-6528/ab07d9DOI Listing
February 2019
1 Read

3D ordered mesoporous TiO2@CMK-3 nanostructure for sodium-ion batteries with long-term and high-rate performance.

Nanotechnology 2019 Feb 18. Epub 2019 Feb 18.

School of Science, Xi'an Jiaotong University, Xi'an, Shaanxi, CHINA.

Abstract:Sodium ion battery is abundant in resources and costs low, making it very competitive in the large-scale energy storage devices. The anatase TiO2 electrode material with insertion/extraction mechanism shows stable cycling performance,which is more in line with the technical requirements of large-scale energy storage batteries. To improve the electrical conductivity and stability of the TiO2 electrode materials, we have synthesized anatase TiO2 and CMK-3 composite. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0812DOI Listing
February 2019

Fractal gold-based microelectrode arrays for in vitro recording and stimulation from neuronal networks.

Nanotechnology 2019 Feb 18. Epub 2019 Feb 18.

Bioengineering, The University of Texas at Dallas, 800 W. Campbell Rd, BSB 13.633, Richardson, Texas, UNITED STATES.

An ideal microelectrode array (MEA) design should include materials and structures which exhibit biocompatibility, low electrode polarization (EP), low impedance/noise, and structural durability. Here, the fabrication of MEAs with indium tin oxide (ITO) electrodes deposited with fractal gold nanostructures (GNS) is described. We show that fern leaf-like fractal GNS deposited on ITO electrodes are conducive for neural cell attachment and viability while reducing the interfacial impedance more than two orders of magnitude at low frequencies (100 - 1000 Hz) versus bare ITO. Read More

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http://dx.doi.org/10.1088/1361-6528/ab07cdDOI Listing
February 2019

Selective photochromism in self-coated WO3/WO3-x homojunction: enhanced solar modulation efficiency, high luminous transmittance and fast self-bleaching rate.

Nanotechnology 2019 Feb 15. Epub 2019 Feb 15.

Shanghai Institute of Ceramics Chinese Academy of Sciences, Changning District, Shanghai, CHINA.

Pursuing excellent photochromic (PC) property is still a longstanding challenge for energy-efficient smart coatings. Herein, we have prepared a novel series of self-coated crystalline WO3-amorphous WO3-x homojunction by one-step hydrothermal process, in which oxalic acid was used for a capping agent to prevent polycondenstation and crystallization of [WO6]. The as-prepared nanopowders have large specific surface area and rich surface electron, which lead to a dramatic photochromic property reaching up to △Tsol=64. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0778DOI Listing
February 2019

Large area patterning of residue-free metal oxide nanostructures by Liquid Transfer Imprint Lithography.

Nanotechnology 2019 Feb 15. Epub 2019 Feb 15.

Nanomechanical System Research Division, Korea Institute of Machinery and Materials, Jang-dong, Yuseong-gu, Daejeon 305-343, KOREA, DaeJeon, 305-600, KOREA, REPUBLIC OF.

One-dimensional and three-dimensional residue-free metal oxide patterns are directly fabricated over large areas using liquid transfer imprint lithography (LTIL) with an ultraviolet (UV)-curable metal oxide precursor resist. A one-dimensional line or pillar array of metal oxides nano-patterns without a residual layer is formed by LTIL and annealing processes. A three-dimensional layer-by-layer nanomesh structure is successfully constructed by repeating the LTIL method without a complex etching process. Read More

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http://dx.doi.org/10.1088/1361-6528/ab077dDOI Listing
February 2019

Design of a multi-analyte resonant photonic platform for label-free biosensing.

Nanotechnology 2019 Feb 15. Epub 2019 Feb 15.

Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, 710049, P. R. China, Xi'an, CHINA.

We have designed a multi-analyte biosensing platform based on a hybrid whispering gallery mode resonator to detect protein biomarkers, e.g. those allowing the early diagnosis of Alzheimer's disease. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0771DOI Listing
February 2019

Thermal transport in C3N nanotube: a comparative study with carbon nanotube.

Authors:
Xu Cheng Xinyu Wang

Nanotechnology 2019 Feb 15. Epub 2019 Feb 15.

Institute of Thermal Science and Technology, Shandong University, 17923 Jinshi Road, Jinan, Shandong Province, 250061, CHINA.

One-dimensional nanotubes, such as, carbon nanotube (CNT) and C3N nanotube (C<sub>3</sub>NNT), are attracting growing research interest due to their excellent electrical and thermal properties. In this work, thermal transport of single-walled C<sub>3</sub>NNT is investigated in comparison with the single-walled CNT using classical molecular dynamics (MD) simulations. We firstly observe that the thermal conductivity (<i>k</i>) of C<sub>3</sub>NNT is lower than that of CNT. Read More

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http://dx.doi.org/10.1088/1361-6528/ab077aDOI Listing
February 2019

One step synthesis of PANI/Fe2O3 nanocomposites and flexible film for enhanced NH3 sensing performance at room temperature.

Nanotechnology 2019 Feb 15. Epub 2019 Feb 15.

Institute of Polymer Product Engineering, Linz, AUSTRIA.

Novel sea cucumber-shaped polyaniline/ferric oxide (PANI/Fe2O3) nanocomposites were synthesized using a simple and efficient one-step hydrothermal process, and further assembling the nanocomposites onto a polyethylene terephthalate (PET) flexible substrate. Through monitoring the resistance of the PANI/Fe2O3 nanocomposites thick film and PANI/Fe2O3-PET flexible sensors, the responses of the sensors are obtained to various 100 ppm gases including methanol, triethylamine, aniline and other five gases. It is found that two kinds of sensors exhibit a high selectivity towards NH3. Read More

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http://dx.doi.org/10.1088/1361-6528/ab076eDOI Listing
February 2019

Modification of block copolymer lithography masks by O2/Ar plasma treatment: Insights from lift-off experiments, nanopore etching and free membranes.

Nanotechnology 2019 Feb 13. Epub 2019 Feb 13.

Dept. of Physics, Universitat Paderborn, Paderborn, Nordrhein-Westfalen, GERMANY.

Block copolymer (BCP) lithography allows for the large-area patterning of surfaces with self-assembled nanoscale features. The created nanostructured polymer films can be applied as masks in common lithography processing steps, such as lift-off and etching for pattern replication and transfer. In this work, we discuss an approach to improve the pattern replication efficiency by modification of the polymer mask prior to lithographical use by means of an O<sub>2</sub>/Ar plasma treatment. Read More

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http://dx.doi.org/10.1088/1361-6528/ab06ddDOI Listing
February 2019

Effects of surface and twinning energies on twining-superlattice formation in group III-V semiconductor nanowires: a first-principles study.

Nanotechnology 2019 Feb 13. Epub 2019 Feb 13.

Department of Physics Engineering, Mie University, Tsu, JAPAN.

The formation of twin plane superlattice in group III-V semiconductor nanowires (NWs) is analyzed by considering two dimensional nucleation using surface and twinning energies obtained by performing electronic structure calculations within density functional theory. The calculations for GaP, GaAs, InP, and InAs demonstrate that surface energies strongly depend on the growth conditions such as temperature and pressure during the epitaxial growth. Furthermore, the calculated twinning energies are found to be much smaller than previously estimated values by the dissociation width of edge dislocations, which lead to smaller segment length. Read More

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http://dx.doi.org/10.1088/1361-6528/ab06d0DOI Listing
February 2019

Effect of Br content on phase stability and performance of HN=CHNHPb(I Br ) perovskite thin films.

Nanotechnology 2019 Apr 13;30(16):165402. Epub 2019 Feb 13.

State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, People's Republic of China.

Pristine and Br-doped HN = CHNHPb(I Br ) (FAPb(I Br ), Br content x = 0, 0.05, 0.15, 0. Read More

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http://dx.doi.org/10.1088/1361-6528/aafeb6DOI Listing

Nanoplasmonic response of porous Au-TiO2 thin films prepared by oblique angle deposition.

Nanotechnology 2019 Feb 12. Epub 2019 Feb 12.

Physics Department, Universidade do Minho, Braga, PORTUGAL.

In this work, a versatile method is proposed to increase the sensitivity of optical sensors based on the localized surface plasmon resonance (LSPR) phenomenon. It combines a physical deposition method with the Oblique Angle Deposition (OAD) technique, allowing the preparation of plasmonic thin films with tailored porosity. Thin films of Au-TiO<sub>2</sub> were deposited by reactive magnetron sputtering in a 3D nanostructure (zigzag growth), at different incidence angles (0º ≤ α ≤ 80º), followed by in-air thermal annealing at 400 ºC to induce the growth of the Au nanoparticles. Read More

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http://dx.doi.org/10.1088/1361-6528/ab068eDOI Listing
February 2019
4 Reads

Novel mesoporous electrode materials for symmetric, asymmetric and hybrid supercapacitors.

Nanotechnology 2019 Feb 12. Epub 2019 Feb 12.

NanoScience Technology Center, University of Central Florida - College of Optics and Photonics, Orlando, UNITED STATES.

Electrochemical capacitors or supercapacitors have achieved great interest in the recent past due to their potential applications ranging from microelectronic devices to hybrid electric vehicles. Supercapacitors can provide high power densities but their inherently low energy density remains a great challenge. The high-performance supercapacitors utilize large electrode surface area for electrochemical double-layer capacitance and/or pseudocapacitance. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0685DOI Listing
February 2019

Synthesis of FeP nanotube arrays as negative electrode for solid-state asymmetric supercapacitor.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

Advanced Materials Research Institute, University of New Orleans, 2000 Lakeshore Drive, Science Bldg.2003, New Orleans, Louisiana, 70148, UNITED STATES.

Recently, metal phosphides have attracted considerable attention as promising electrode materials for supercapacitors. In this work, FeP nanotube arrays have been successfully synthesized on carbon cloth using ZnO nanorod arrays as the sacrificial templets, via a phosphidation process. The dimensions of the FeP nanotubes are characterized using SEM and TEM showing the diameter to be approximately 200 nm and with a wall thickness of 50-100 nm. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0620DOI Listing
February 2019

Structural and optical properties of individual Zn2GeO4 particles embedded in ZnO.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

Department of Physics, University of Oslo, PO Box 1048, Blindern, NO-0318 Oslo, Oslo, NORWAY.

Functionalizing transparent conducting oxides (TCOs) is an intriguing approach to expand the tunability and operation of optoelectronic devices. For example, forming nanoparticles that act as quantum wells or barriers in zinc oxide (ZnO), one of the main TCOs today, may expand its optical and electronic tunability. In this work, 800~keV Ge ions have been implanted at a dose of 1· 10<sup>16</sup>cm<sup>-2</sup> into crystalline ZnO. Read More

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http://dx.doi.org/10.1088/1361-6528/ab061cDOI Listing
February 2019

Novel dealloying-fabricated NiCo2S4 nanoparticles with excellent cycling performance for supercapacitors.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

School of Science, Xi'an Jiaotong University, No 28 Xianning West Road, Xi'an, Shaanxi Province 710049, xi'an, CHINA.

In this work, NiCo2S4 nanoparticles for supercapacitors are successfully synthesized, by using a top-down strategy, thorough a novel dealloying method together with ion exchange reaction. The surface morphology and X-ray diffraction (XRD) investigations demonstrated that NiCo2S4 nanoparticles are interconnected by ligaments of the synthesized sample. The dealloyed NiCo2S4 shows an enhanced electrochemical performance of about 1132. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0605DOI Listing
February 2019

Enhanced thermal conductivity and lower density composites with brick wall microstructure based on highly oriented graphite nanoplatelet: towards manufacturable cooling substrates for high power density electronic devices.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

United Microelect Corp. Ltd, Pasir Ris, SINGAPORE.

Sustainable and smart thermal management in modern wearable electronics are becoming increasingly paramount important driven by improving the reliability and preventing premature failure of electronics. In this work, we report on the development of a new type of nanocomposites based on highly oriented graphite nanoplatelets (GNPs), functional as a thermal substrate with enhanced thermal conductivity and efficient cooling effect via a manufacturable process. Firstly, GNP/CMC (Sodium carboxymethyl cellulose) nanocomposite films (GMFs) were fabricated in mass industry available level by gap coating method, in which GNPs were well preferred due to the driving interface wettability and interaction of CMC, resulting in high in-plane thermal conductivity. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0638DOI Listing
February 2019

Organic charge transfer complexes (CPXs) on graphene with ultrahigh near infrared (NIR) photogain.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

National Center for Nanoscience and Technology, Haidian District, 100190, CHINA.

Photodetectors have widespread applications in telecommunication, thermal imaging, bio-medical imaging and so on. Photogating effect, arising from charge trapping at defects and/or interfaces, can have extremely high photoelectric gain, which can benefit to high-sensitivity room temperature photodetection. Here, we introduce thin layered organic CPXs integrated on graphene transistors for the development of hybrid phototransistors with ultra-high photoresponsivity of ~106 A/W in near infrared (NIR) region at room temperature. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0608DOI Listing
February 2019

Liquid-gas phase transition of Ar inside graphene nanobubbles on the graphite substrate.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

Center for Design, Manufacturing and Materials, Skolkovo Institute of Science and Technology, Skolkovo, Moscow, RUSSIAN FEDERATION.

Graphene nanobubbles are formed when a substance is trapped between a graphene sheet (a 2D crystal) and an atomically flat substrate. The physical state of the substance inside graphene nanobubbles can vary from the gas phase to crystal clusters. In this paper, we present a theoretical description of the gas-liquid phase transition of argon inside graphene nanobubbles. Read More

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http://dx.doi.org/10.1088/1361-6528/ab061fDOI Listing
February 2019

Recent progress in the synthesis and applications of 2D metal nanosheets.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Mail box No.121, School of Materials and Metallurgy, No.947 Heping Road, Wuhan, Hubei, 430081, CHINA.

The design and controlled synthesis of two-dimensional (2D) nanomaterials have been widely studied because the properties and functions of nanomaterials are highly dependent on their sizes, shapes, and dimensionalities. For instance, 2D metal nanosheets (2DMNSs) have attracted a significant amount of attention owing to their interesting properties, which are absent in corresponding bulk counterparts, and they have been confirmed to have potential applications in electrocatalysis, optics, and biomedicine. However, because of the close-packed structures of metals, the large-scale fabrication of 2DMNSs is challenging. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0642DOI Listing
February 2019

Size-tunable MRI-visible nitroxide-based magnetic mixed micelles: preparation, stability, and theranostic application.

Nanotechnology 2019 Feb 11. Epub 2019 Feb 11.

Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, JAPAN.

Metal-free magnetic mixed micelles (mean diameter: 16 nm) composed of biocompatible surfactant Tween 80 and hydrophobic pyrrolidine-<i>N</i>-oxyl radical were prepared by mixing them in phosphate-buffered saline (PBS). The magnetic mixed micelles were characterized by dynamic light scattering (DLS) and small angle neutron scattering (SANS) measurements. The stability of the micelles is found to depend on the length of alkyl side chain in the nitroxide compounds and degree of unsaturation in the hydrophobic chain in the surfactant. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0627DOI Listing
February 2019

Optical properties of GaN Nanowires grown on chemical vapor deposited-Graphene.

Nanotechnology 2019 Feb 8. Epub 2019 Feb 8.

Institut d'Electronique Fondamentale, CNRS et University Paris-Sud 11, Batiment 220, 91405 Orsay cedex, Orsay, FRANCE.

Optical properties of GaN nanowires grown on chemical vapor deposited graphene transferred on an amorphous support are reported. The growth temperature was optimized to achieve a high nanowire density with a perfect selectivity with respect to a SiO2 surface. The growth temperature window was found to be rather narrow (815 ± 5) °C. Read More

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http://iopscience.iop.org/article/10.1088/1361-6528/ab0570
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http://dx.doi.org/10.1088/1361-6528/ab0570DOI Listing
February 2019
5 Reads

Investigation of GaN Nanowires containing AlN/GaN multiple quantum discs by EBIC and CL techniques.

Nanotechnology 2019 Feb 8. Epub 2019 Feb 8.

Centre de Nanosciences et de Nanotechnologies, UMR9001 CNRS, University Paris Sud, University Paris Saclay, Palaiseau, FRANCE.

In this work, nanoscale electrical and optical properties of n-GaN nanowires (NWs) containing GaN/AlN multiple quantum discs (MQDs) grown by molecular beam epitaxy (MBE) are investigated by means of single wire I(V) measurements, electron-beam induced current microscopy (EBIC) and cathodoluminescence (CL) analysis. A strong impact of non-intentional AlN and GaN shells on the electrical resistance of individual NWs is put in evidence. The EBIC mappings reveal the presence of two regions with internal electric fields oriented in opposite directions: one in the MQDs region and the other in the adjacent bottom GaN segment. Read More

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http://dx.doi.org/10.1088/1361-6528/ab055eDOI Listing
February 2019

Highly monodisperse Au@Ag nanospheres: synthesis by controlled etching route and size-dependent SERS performance of their surperlattices.

Nanotechnology 2019 Feb 8. Epub 2019 Feb 8.

Department of physical materials and engineering, Dalian Minzu University , Dalian, CHINA.

For accurate experimental and theoretical research, the preparation of nanocrystrals with regular morphology is of significant importance. In this work, we investigated a facile and effective route for generating highly spherical Au@Ag nanospheres (NSs) with tuneable size and uniform morphology at room temperature. The aqueous synthesis mainly involved seed-mediated growth method together with oxidation etching employing sodium hypochlorite (NaClO) as etching agent. Read More

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http://dx.doi.org/10.1088/1361-6528/ab055bDOI Listing
February 2019
3.821 Impact Factor

Polydopamine-based surface modification of paclitaxel nanoparticles for osteosarcoma targeted therapy.

Nanotechnology 2019 Feb 8. Epub 2019 Feb 8.

Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development, Beijing, CHINA.

In order to achieve the purpose of targeting treatment of osteosarcoma, we developed novel paclitaxel (PTX) nanoparticles (Nps) coated with polydopamine (PDA) and grafted by alendronate (ALN) as ligand. Dopamine can be easily polymerized on various surfaces to form a thin PDA film in alkaline environment, which provided a versatile platform to perform secondary reactions for compounds without functional groups. The targeting Nps had a mean particle size of 290. Read More

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http://dx.doi.org/10.1088/1361-6528/ab055fDOI Listing
February 2019

Mesoporous ZnCo2O4 /rGO nanocomposites enhancing sodium storage.

Nanotechnology 2019 Feb 7. Epub 2019 Feb 7.

Physics and Chemistry of Materials, Tianjin Normal University, No. 393 Binshui West Road, Tianjin, Tianjin, 300387, CHINA.

In this study, mesoporous ZnCo2O4/rGO nanocomposites were favorably synthesized via a simple solvothermal technique. As a prospective anode material for sodium-ion batteries, the resulting ZnCo2O4/rGO-II nanocomposite exhibited superior electrochemical sodium-storage performance with predominant specific capacity, favorable cyclability and ascendant rate capability. For instance, an outstanding discharge capacity of 210. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0504DOI Listing
February 2019
1 Read

A low-damage plasma surface modification method of stacked graphene bilayers for configurable wettability and electrical properties.

Nanotechnology 2019 Feb 7. Epub 2019 Feb 7.

Electronics Engineering, National Taiwan University, Taipei, 106, TAIWAN.

In this work, we study surface-functionalization effects of artificially stacked graphene bilayers (ASGBs) to control its wetting properties via low-damage plasma. The ASGBs was prepared on SiO2/Si substrate by stacking two monolayer graphene, which was grown by chemical vapor deposition. As a result, the low-damage plasma functionalization of ASGBs could hold both the key characteristics of surface functionalization and electrical transport properties of graphene. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0511DOI Listing
February 2019

Transparent conductive film based on silver nanowires and single-wall carbon nanotubes for transparent heating films.

Nanotechnology 2019 Feb 7. Epub 2019 Feb 7.

Engineering Research Center for Nanophotonics and Advanced Instrument, Ministry of Education, and Department of Physics, East China Normal University, Shanghai, CHINA.

In this paper, the hybrid transparent conductive films (TCFs) are designed by combining the silver nanowires with the single-wall carbon nanotubes (SWCNTs), the transparent heating films (THFs) based on the TCFs are evalued for the possible vehicle applications. By comparing the properties, including the transmittance, sheet resistance, microstructure, heating curves, we found that the SWCNTs/AgNWs is considerably suitable for making THFs. The after-treatment methods, such as physical method (hot roll pressing) and chemical method (nitride acid and Poly (diallydimethylammonium chloride) solution, (PDAC)) were researched in detail to optimize the sheet resistance and transparency to fit the THF requirements. Read More

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http://dx.doi.org/10.1088/1361-6528/ab051bDOI Listing
February 2019

Detection of metal corrosion characteristics in chlorine solution using solid state nanopore.

Nanotechnology 2019 Feb 7. Epub 2019 Feb 7.

Department of Materials Science and Engineering, Seoul National University, Nano Fabrication Laboratory , 599 Gwanangno, Gwank-gu, Seoul 151-744, KOREA, Seoul, KOREA, REPUBLIC OF.

Nanopore structures were originally proposed for detection of biomolecule translocation through nanometer-scale pores that perforate membranes by transient changes in ionic current. In this study, these changes are utilized to detect corrosion of different metals in aqueous chlorine media. The corrosion behaviors of Cu, Al, Ti, and Cr were analyzed by monitoring the changes in ion current resulting from ion concentration variations in solutions due to corrosion of the metals. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0515DOI Listing
February 2019

Pixel based biosensor for enhanced control: Silicon nanowires monolithically integrated with field-effect transistors in fully depleted silicon on insulator technology.

Nanotechnology 2019 Feb 5. Epub 2019 Feb 5.

Integrated Devices and Circuits, KTH Royal Institute of Technology, Kista, SWEDEN.

Silicon nanowires (SiNWs) are widely used technology for sensing applications. Complementary metal-oxide-semiconductor (CMOS) integration of SiNWs advances lab-on-chip (LOC) technology and offers opportunities for read-out circuit integration, selective and multiplexed detection. In this work, we propose novel scalable pixel based biosensors exploiting the integration of SiNWs with CMOS in fully-depleted silicon-on-insulator (FDSOI) technology. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0469DOI Listing
February 2019
1 Read
3.821 Impact Factor

DNA Translocation through a Nanopore in Ultrathin Self-assembled Peptide Membrane.

Nanotechnology 2019 Feb 5. Epub 2019 Feb 5.

Department of Materials Science and Engineering, Seoul National University, Nano Fabrication Laboratory , 599 Gwanangno, Gwank-gu, Seoul 151-744, KOREA, Seoul, KOREA, REPUBLIC OF.

Here, we explore the possibility of using peptide-based materials as a membrane in solid-state nanopore devices as an effort to develop a sequence-specific, programmable biological membrane platform. We use a recently developed tyrosine-mediated self-assembly peptide sheet. At the air/water interface, the 5mer peptide YFCFY self-assembles into a uniform and robust two-dimensional structure, and the peptide sheet is easily transferred to a low-noise glass substrate. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0488DOI Listing
February 2019
1 Read

Improved photo- and chemical-responses of graphene via porphyrin-functionalization for flexible, transparent, and sensitive sensors.

Nanotechnology 2019 Feb 5. Epub 2019 Feb 5.

School of Mechanical Engineering, Yonsei University, Seoul, Korea (the Republic of).

The functionalization of graphene with organic molecules is beneficial for the realization of high-performance graphene sensors because functionalization can provide enhanced functionalities beyond the properties of pristine graphene. Although various types of sensors based on organic-graphene hybrids have been developed, the functionalization processes have poor thickness-controllability/reliability or require post-processing, and sensor applications rely on conventional, rigid substrates such as SiO2/Si. Here, a flexible and transparent metalloporphyrin (MPP)-graphene hybrid for sensitive UV detection and chemical sensing is demonstrated. Read More

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http://iopscience.iop.org/article/10.1088/1361-6528/ab048d
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http://dx.doi.org/10.1088/1361-6528/ab048dDOI Listing
February 2019
4 Reads

Steep-Slope Field-Effect Transistors with AlGaN/GaN HEMT and Oxide based Threshold Switching Device.

Nanotechnology 2019 Feb 5. Epub 2019 Feb 5.

ELectrical Engineering Department, Arizona State University, Tempe, Arizona, UNITED STATES.

We report the demonstration of a steep-slope field-effect transistor with an AlGaN/GaN MIS-HEMTs employing SiO2-based threshold switching devices in series with the source. The SiO2-based threshold switching devices exhibited steep slope when changing resistance states. The integrated steep-slope transistor showed a low subthreshold swing of sub-5mV/dec with a transition range of over 105 in the transfer characteristics in both sweep directions at room temperature, as well as the low leakage current (10-5 μA/μm) and a high ION/IOFF ratio (>107). Read More

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http://dx.doi.org/10.1088/1361-6528/ab0484DOI Listing
February 2019

Conductive Films Based on Sandwich Structures of Carbon Nanotubes/Silver Nanowires for Stretchable Interconnects.

Nanotechnology 2019 Feb 5. Epub 2019 Feb 5.

Department of Materials Science and Engineering, National Cheng-Kung University, Tainan City, TAIWAN.

A variety of conductive films made of a hybrid of two conductive nanomaterials have been used as stretchable electrodes or interconnectors, desirable for stretchable electronic devices. Their intrinsic stretchability of electrical conductivity would allow for accommodating mechanical strain to a certain extent under various deformations. However, few efforts have been made to enhance the interactions between two conductive components in a hybrid system. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0483DOI Listing
February 2019
1 Read

Application of metallic inks based on nickel-silver core-shell nanoparticles for fabrication of conductive films.

Nanotechnology 2019 Feb 5. Epub 2019 Feb 5.

Polska Akademia Nauk Instytut Katalizy i Fizykochemii Powierzchni, niezapominajek 8, Krakow, 30-239, POLAND.

Conductive inks based on nickel nanoparticles (NPs) have attracted much attention as a low-cost replacement for the currently used silver and gold inks for fabrication of printed electronic circuits and devices. Nickel NPs as a component of conductive inks should be stable against oxidation process at all stages of preparation of conductive patterns: ink formulation and storage, printing, and post-printing treatment. In the present study, the oxidation resistance of the Ag layer and the conductive properties of the Ni core allowed to use nickel-silver core-shell (Ni@Ag) NPs as the component of conductive ink. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0467DOI Listing
February 2019
1 Read

Slanted Ag-Al alloy nanorods arrays for highly active and stable SERS substrates.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

School of Material Science and Engineering, Tsinghua University, Beijing 100084, Beijing, CHINA.

Aluminum has been established as an earth-abundant and cheap alternative to gold and silver for plasmonic applications. Particularly, aluminum prefers to combine with oxygen compared with silver. Here, a simple physical vapor co-deposition (PVD) technique is presented to prepare the Ag-Al alloy nanorods (NRs) with a small amount of aluminum. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0442DOI Listing
February 2019

Interfacial water intercalation-induced metal-insulator transition in NbS2/BN heterostructure.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

Physics, Renming University, Beijing, CHINA.

Interfacial engineering, such as molecule intercalation, can modify properties and optimize performance of van der Waals heterostructures and their devices. Here, we investigated the pristine and water molecule intercalated heterointerface of niobium disulphide (NbS2) on hexagonal boron nitride (h-BN) (NbS2/BN) using advanced atomic force microscopy (AFM), and observed the metal-insulator transition (MIT) of first layer (1L-) of NbS2 induced by water molecule intercalation. In pristine sample, interfacial charge transfers were confirmed by the direct detection of trapped static charges at the post-exposed h-BN surface, produced by mechanically peeling off the 1L-NbS2 from the substrate. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0452DOI Listing
February 2019

Three-dimensional radial junction solar cell based on ordered silicon nanowires.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

Biomaterials Center, National Institute for Materials Science, Tsukuba, JAPAN.

Highly ordered silicon nanowires (SiNWs) were fabricated by nanoimprint lithography and Bosch etching methods. A polycrystalline silicon shell was grown to form a radial p-n junction. To enhance its anti-reflection properties and conductivity, a thin ITO layer was deposited on the SiNWs solar cell, then a micro-grid electrode was introduced to minimize the metal areas to maximize carrier collection. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0451DOI Listing
February 2019

Fabrication of polycaprolactone electrospun nanofibers doped with silver nanoparticles formed by air plasma treatment.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

McMaster University, Hamilton, Ontario, CANADA.

Implanted devices are prone to bacterial infections, which can result in implant loosening and device failure. Mitigating these infections is important to both implant stability and patient health. The development of antibacterial implant coatings can decrease the presence of bacterial colonies, reducing the risk for bacterial-dependent implant failure. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0444DOI Listing
February 2019
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The origin of negative charging in amorphous Al2O3 films: The role of native defects.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

Physics and Astronomy, University of Leuven, Celestijnenlaan 200D, box 2417, Laboratory of Semiconductor Physics, Leuven, 3001, BELGIUM.

Amorphous aluminum oxide Al<sub>2</sub>O<sub>3</sub> (a-Al<sub>2</sub>O<sub>3</sub>) layers grown by various deposition techniques contain a significant density of negative charges. In spite of several experimental and theoretical studies, the origin of these charges still remains unclear. We report the results of extensive Density Functional Theory (DFT) calculations of native defects - O and Al vacancies and interstitials, as well as H interstitial centers - in different charge states in both crystalline α-Al<sub>2</sub>O<sub>3</sub> and in a-Al<sub>2</sub>O<sub>3</sub>. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0450DOI Listing
February 2019

Surface functionalization of electrospun PAN nanofibers with ZnO-Ag heterostructure nanoparticles: Synthesis and antibacterial study.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

Department of Chemistry, National Institute of Technology - Rourkela, N.I.T Rourkela, Orissa, Rourkela, Odisha, 769008, INDIA.

In this work, we have prepared polyacrylonitrile (PAN) polymer nanofibers by electrospinning method. The surface of the electrospun PAN nanofibers membrane has been functionalized with ZnO-Ag heterostructure nanoparticles by using three different chemical pathways such as reflux, blending, hydrothermal methods and accordingly the prepared composite nanofibers membranes were named as PAN/ZnO-Ag (R), PAN/ZnO-Ag (B) and PAN/ZnO-Ag (H) respectively. The obtained heterostructure nanoparticles functionalized PAN nanofibers membranes were characterized using ATR-FTIR, XRD, FESEM and TEM analytical techniques. Read More

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http://dx.doi.org/10.1088/1361-6528/ab045dDOI Listing
February 2019

Carrier dynamics in silicon nanowires studied via femtosecond transient optical spectroscopy from 1.1 to 3.5 eV.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

Isituto per la Microelettronica e i Microsistemi, CNR - Istituto per la Microelettronica e Microsistemi Roma, Via Fosso del Cavaliere, Roma, 00133, ITALY.

We present femtosecond transient transmission (or absorbance) measurements in silicon nanowires in the energy range 1.1-3.5 eV, from below the indirect band-gap to above the direct band-gap. Read More

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http://dx.doi.org/10.1088/1361-6528/ab044aDOI Listing
February 2019

Enhanced lithium storage performance of graphene nanoribbons doped with high content of nitrogen atoms.

Nanotechnology 2019 Feb 4. Epub 2019 Feb 4.

Nano-Devices and Materials Division, Chinese Academy of Sciences - Suzhou Institute of Nano-tech and Nano-bionics, Suzhou, CHINA.

Nitrogen doping can provide a large number of active sites for lithium-ion storage, thus can yield a higher capacity for lithium-ion batteries. However, most of the reported N-doped graphene-based materials have low nitrogen contents (< 10 wt%) as the introduction of nitrogen atoms prefers to produce at edges and defects in the graphene lattices. Owing to the formation of edges and defects, the doped states or active sites can easily be located and nitrogen contents can be determined precisely. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0434DOI Listing
February 2019

Recent advances in Sb-based III-V nanowires.

Nanotechnology 2019 Feb 1. Epub 2019 Feb 1.

School of Materials Science and Engineering, Nanjing University of Science & Technology, Nanjing University of Science & Technology, Nanjing 210094, China, Nanjing, CHINA.

Owing to the high mobility, narrow bandgap, strong spin-orbit coupling and large g-factor, Sb-based III-V nanowires (NWs) attracted significant interests in high-speed electronics, long-wavelength photodetectors and quantum superconductivity in the past decade. In this review, we aim to give an integrated summarization about the recent advances in binary as well as ternary Sb-based III-V NWs, starting from the fundamental properties, NWs growth mechanism, typical synthetic methods to their applications in transistors, photodetectors, and Majorana fermions detection. Up to now, famous NWs growth techniques of solid-source chemical vapor deposition, molecular beam epitaxy, metal organic vapour phase epitaxy and metalorganic chemical vapor deposition etc. Read More

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http://dx.doi.org/10.1088/1361-6528/ab03eeDOI Listing
February 2019

Nanowire-based Sources of Non-classical Light.

Nanotechnology 2019 Jan 31. Epub 2019 Jan 31.

Institute for Microstructural Sciences, National Research Council of Canada - Ottawa, Ottawa, CANADA.

Sources of quantum light that utilize photonic nanowire designs have emerged as potential candidates for high efficiency non-classical light generation in quantum information processing. In this review we cover the different platforms used to produce nanowire-based sources, highlighting the importance of waveguide design and material properties in achieving optimal performance. The limitations of the sources are identified and routes to optimization are proposed. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0393DOI Listing
January 2019
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A novel 96.5Sn3Cu0.5Mn nanosolder with enhanced wettability applied to nanosoldering of WO3 nanomaterial.

Nanotechnology 2019 Jan 30. Epub 2019 Jan 30.

Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, Gansu, Lanzhou, CHINA.

Nano-soldering relying on a sacrificial nanosolder, is a flexible interconnection technique, having promising applications in joining nanosized functional materials; that is an essential step in the assembly of nano-devices. In a soldering, the wettability is important in the bonding of two nanomaterial, which determines the quality of the junction. Tungsten trioxide nanomaterial has unique characteristics such as electro-, opto-, gaso-chromic. Read More

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http://dx.doi.org/10.1088/1361-6528/ab030cDOI Listing
January 2019
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Active broadband terahertz wave impedance matching based on optically doped graphene-silicon heterojunction.

Nanotechnology 2019 Jan 30. Epub 2019 Jan 30.

Nanobiophotonic Center, Northwest University, Xi-an 710069, Xi'an, CHINA.

Broadband terahertz impedance matching is important for both spectral resolution improvement and terahertz anti-radar technology. Herein, graphene-silicon hybrid structure has been proposed for active broadband terahertz wave impedance matching with optical tunability. The main transmission pulse measured in the time domain indicates a modulation depth as high as 92. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0329DOI Listing
January 2019

The impact of hexagonal boron nitride encapsulation on the structural and vibrational properties of few layer black phosphorus.

Nanotechnology 2019 Jan 30. Epub 2019 Jan 30.

University of Warsaw, Warsaw, POLAND.

The encapsulation of two-dimensional layered materials such as black phosphorus is of paramount importance for their stability in air. However, the encapsulation poses several questions, namely, how it affects, via the weak van der Waals forces, the properties of the black phosphorus and whether these properties can be tuned on demand. Prompted by these questions, we have investigated the impact of hexagonal boron nitride encapsulation on the structural and vibrational properties of few layer black phosphorus, using a first-principles method in the framework of density functional theory. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0332DOI Listing
January 2019

Biosensing Using Arrays of Vertical Semiconductor Nanowires: Mechanosensing and Biomarker Detection.

Nanotechnology 2019 Jan 30. Epub 2019 Jan 30.

Department of Solid State Physics, Lund University, Box 188, S-22100 Lund, Lund, SWEDEN.

Due to their high aspect ratio and increased surface to foot-print area, arrays of vertical semiconductor nanowires are used in numerous biological applications, such as cell transfection and biosensing. Here we focus on two specific, valuable biosensing approaches that, so far, have received relatively limited attention in terms of their potential capabilities: cellular mechanosensing and lightguiding-induced enhanced fluorescence detection. Although proposed a decade ago, these two applications for using vertical nanowire arrays have only very recently achieved significant breakthroughs, both in terms of understanding their fundamental phenomena, and in the ease of their implementation. Read More

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http://dx.doi.org/10.1088/1361-6528/ab0326DOI Listing
January 2019