Nanomaterials
·
2018
·Vol. 8
·期 4
·192
·
IF 3.504
Yifan Zheng,Nana Chen,Chunxiao Wang,Xiaoping Zhang,Zongjian Liu
While high-aspect-ratio metal nanowires are essential for producing nanowire-based electrodes of good performance used in electronics and electrocatalysis, the synthesis of millimeter-long Cu nanowires remains a challenge. This work demonstrates an oleylamine-mediated hydrothermal method for synthesis of Cu nanowires with an average diameter of ~80 nm and a length up to several millimeters. An investigation on the role of oleylamine in nanowire formation by mass spectroscopy, small angle X-ray diffraction and transmission electron microscopy reveals that oleylamine serves as a mild reducing agent for slow reduction of Cu(II) to Cu, a complexing agent to form Cu(II)-oleylamine complex for guiding the nanowire growth, as well as a surfactant to generate lamellar phase structure for the formation of nanowire bundles. The growth mechanism of these millimeter-long Cu nanowire bundles is proposed based on the experimental observations. Electrochemical measurements by linear sweep voltammetry indicate that the self-supported nanowire electrode prepared from as-formed Cu nanowire bundles shows high catalytic activity for electroreduction of nitrate in water.Keywords:Cu nanowires;hydrothermal method;oleylamine;nitrate;electroreduction
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2013
·
IF 5.868
Yajuan Xing,Xiaohua Zhang,Hongyuan Chen,Minghai Chen,Qingwen Li
Buckypapers, the thin sheets made from an aggregate of carbon nanotubes (CNTs), have demonstrated promising electrical and thermal conductivities . However, the high in-plane to perpendicular anisotropy makes its application as thermal interface materials difficult. In order to increase the perpendicular electrical and thermal conductivities, copper nanowires (Cu NWs) were introduced into buckypapers. The Cu NWs stuck into the empty spaces between CNTs, connected them perpendicularly, and even induced a certain perpendicular CNT alignment. The electrical conductivity increased continuously with increasing the Cu content, while the smallest anisotropy was observed at the 50 wt.% Cu filling because an in-plane Cu network formed and improved much more the in-plane conductivity above this filling. On the contrary, as CNTs are more thermally conducting than Cu, the loading of Cu NWs over 50 wt.% decreased the thermal conductivity. Our measurement showed a high perpendicular conductivity of 10.1 W/m K at the 50 wt.% loading, more than quadruple and double as compared with the ones for a pure buckypaper and the one filled with 67–75 wt.% Cu NWs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2019
·Vol. 34
·期 1
·145-149
·
IF 0.605
Wu Junqing,Guo Le,Wen Min,Bu Tongle,Zhou Peng,Zhong Jie,Huang Fuzhi,Zhang Qi
Long (15 - 40 μm), thin (diameter of 20 ± 5 nm), and well-dispersed CuNWs Cu nanowires were prepared. The high-resolution TEM and selected area electron diffraction showed that the CuNWs were single-crystalline. To investigate the growth mechanism, we examined the microstructure of these CuNWs at different reaction time. It was found that the CuNWs were actually formed through the self-assembling of Cu nanoparticles along the [110] direction. The transparent electrodes fabricated using the CuNWs achieved a high transparency of 76 % at 31±5 Ω/□.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SURFACE REVIEW AND LETTERS
·
2019
·
IF 0.748
PING LIU,JIANGHAO WANG,JIE CHENG,LIMING LIU,HONGHANG WANG,BAOQING ZENG,FENG CHI
A flexible organic light-emitting device (OLED) was produced using copper nanowire (CuNW) film as anode and Graphene oxide (GO)/poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) film as anode buffer layer. Compared with other transparent conductive films (TCFs), CuNWs are low cost, easy to fabricate, and compatible with flexible substrates over a large area. Due to these advantages, CuNWs are showing greater and greater promise for the next generation of TCF. Modified by PEDOT:PSS, the conductivity and work function of the CuNW film can be dramatically enhanced. However, PEDOT:PSS is highly acidic and easy to corrode the CuNW film, which will reduce maximum luminous brightness and current efficiency of the OLED. In this paper, GO/PEDOT:PSS was used as anode buffer layer to modify the CuNW anode and the composite transparent electrode exhibited excellent optoelectrical properties. The driving voltage of the OLED with CuNW/PEDOT:PSS is 6.2 V, and the maximum luminous brightness is 2737.2 cd/m 2 . The driving voltage of the OLED with CuNW/GO/PEDOT:PSS anode was reduced to 5.1 V, and the maximum luminous brightness was improved to 3007.4 cd/m 2 .
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 12
·4081-4092
·
IF 7.059
Shaohui Zhang,Chao Wang,Liuyi Ding,Long Zhang,Jiafan Chen,Hui Huang,Dapeng Jiang,Ziyang Chen,Gebo Pan
Flexible wearable electronics, including monitors, supercapacitors, sensors and batteries, especially stress or strain sensors, have attracted extensive discussion and attention, due to their distinctive characteristics such as high sensitivity and ultra-flexibility, and their broad application prospects in artificial intelligence (AI), robot sensing interfaces, and also high precision medical instruments. However, a narrower deformation rate, higher latency, and even counterfeit sensitivity severely limit their sensing performance and popularity in practical applications. Herein, a new bifunctional sensor based on excellent conductive and biocompatible porous copper nanowire (CuNW)/IonGel (PCI) composite films introducing a polystyrene (PS) microsphere template is developed. The sensor exhibits unparalleled mechanical properties (the maximum extension rate is 8000%), as well as omnidirectional, arbitrary angle/dimension extension, distortion and bending. This piezo-resistive sensor also features a convincing ultra-high sensitivity (S, 72.1 kPa−1) and gauge factor (Gf, 28.5) with negligible hysteresis under repeated cycle tests. Furthermore, compared to the same type of sensor, the limit of detection (LOD) is drastically reduced (merely 0.14 Pa). Undoubtedly, it is promising for high-resolution strain/stress-sensing electronic skin (e-skin) and green super-stretched electrodes.
研究领域:
材料科学
·
生物医学工程
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 9
·638
·
IF 4.3
Xiangyun Zha,Depeng Gong,Wanyu Chen,Lili Wu,Chaocan Zhang
Copper nanowires (Cu NWs) are considered a promising alternative to indium tin oxide (ITO) and silver nanowires (Ag NWs) due to their excellent electrical conductivity, mechanical properties, abundant reserves, and low cost. They have been widely applied in various optoelectronic devices. In this study, Cu NWs were synthesized using copper chloride (CuCl 2 ) as the precursor, monoethanolamine (MEA) as the complexing agent, and hydrated hydrazine (N 2 H 4 ) as the reducing agent under strongly alkaline conditions at 60 °C. Notably, this is the first time that MEA has been employed as a complexing agent in this synthesis method for Cu NWs. Through a series of experiments, the optimal conditions for the CuCl 2 –MEA–N 2 H 4 system in Cu NWs synthesis were determined. This study revealed that the presence of amines plays a crucial role in nanowire formation, as the co-ordination of MEA with copper in this system provides selectivity for the nanowire growth direction. MEA prevents the excessive conversion of Cu(I) complexes into Cu 2 O octahedral precipitates and exhibits an adsorption effect during Cu NWs formation. The different adsorption tendencies of MEA at the nanowire ends and lateral surfaces, depending on its concentration, influence the growth of the Cu NWs, as directly reflected by changes in their diameter and length. At an MEA concentration of 210 mM, the synthesized Cu NWs have an average diameter of approximately 101 nm and a length of about 28 μm. To fabricate transparent conductive films, the Cu NW network was transferred onto a polyethylene terephthalate (PET) substrate by applying a pressure of 20 MPa using a tablet press to ensure strong adhesion between the Cu NW-coated mixed cellulose ester (MCE) filter membrane and the PET substrate. Subsequently, the MCE membrane was dissolved by acetone and isopropanol immersion. The resulting Cu NW transparent conductive film exhibited a sheet resistance of 52 Ω sq −1 with an optical transmittance of 86.7%.
研究领域:
材料科学
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纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Xiao-Han Li,Bo-Wen Zhang,Wan-Feng Xiong,Ze Li,Xiao-Yu Xiang,Si-Ying Zhang,Duan-Hui Si,Hong-Fang Li,Rong Cao
Electrochemical reduction of carbon dioxide (CO 2 RR) is a promising approach to complete the carbon cycle and potentially convert CO 2 into valuable chemicals and fuels. Cu is unique among transition metals in its ability to catalyze the CO 2 RR and produce multi-carbon products. However, achieving high selectivity for C 2+ products is challenging for copper-based catalysts, as C–C coupling reactions proceed slowly. Herein, a surface modification strategy involving grafting long alkyl chains onto copper nanowires (Cu NWs) has been proposed to regulate the electronic structure of Cu surface, which facilitates *CO-*CO coupling in the CO 2 RR. The hydrophobicity of the catalysts increases greatly after the introduction of long alkyl chains, therefore the hydrogen evolution reaction (HER) has been inhibited effectively. Such surface modification approach proves to be highly efficient and universal, with the Faradaic efficiency (FE) of C 2 H 4 up to 53% for the optimized Cu–SH catalyst, representing a significant enhancement compared to the pristine Cu NWs (30%). In-situ characterizations and theoretical calculations demonstrate that the different terminal groups of the grafted octadecyl chains can effectively regulate the charge density of Cu NWs interface and change the adsorption configuration of *CO intermediate. The top-adsorbed *CO intermediates (*CO top ) on Cu–SH catalytic interface endow Cu–SH with the highest charge density, which effectively lowers the reaction energy barrier for *CO-*CO coupling, promoting the formation of the *OCCO intermediate, thereby enhancing the selectivity towards C 2 H 4 . This study provides a promising method for designing efficient Cu-based catalysts with high catalytic activity and selectivity towards C 2 H 4 .
研究领域:
物理化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2017
·
IF 4.873
Wangping Huang,Jinhui Li,Songfang Zhao,Fei Han,Guoping Zhang,Rong Sun,Ching-Ping Wong
Copper nanowires (CuNWs) have been considered for the promising application as conductive element of stretchable conductors due to ultrahigh aspect ratio, outstanding conductivity, great flexibility and low-cost. However, controllable synthesis, surface oxidation , poor dispersity have always been main limitations to their application in stretchable conductors. Herein, highly conductive, stretchable and fully printable CuNWs-based composites (PNCNs) by infiltrating CuNWs into poly(styrene-blockbutadiene-block-styrene) (SBS) with a facile, cost-effective and scalable method were reported. CuNWs of high quality, chemical treatment by vacuum filtration way and special dispersion method facilitate fabrication of PNCNs of high performance. As-prepared PNCNs have superior electrical conductivity of 1858 S cm −1 , high break elongation of 920%. Moreover, PNCNs are stable after 1000 cycles for a bend radius of 4.0 mm and electric performance was not affected by twisting. Importantly, PNCNs can be printed on paper to fabricate flexible circuits which exhibit excellent electric performance at different tension conditions.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2017
·Vol. 64
·期 11
·1354-1359
·
IF 0.935
Wangping Huang,Jinhui Li,Fei Han,Guoping Zhang,Rong Sun,Ching-Ping Wong
High-purity, large-aspect-ratio, and well-dispersed copper nanowires (CuNWs) with an average diameter of 45 nm and length >100 μm were successfully synthesized by reducing a Cu(II) salt with glucose, with oleylamine (OM) and oleic acid (OA) serving as dual capping agents, through hydrothermal reduction. A systematic study of the effects of the copper salt, capping agents, reductant, and temperature on the morphology of CuNWs has been conducted. Our results indicate that CuNWs with different diameters can be obtained using different copper salts. The diameter of the as-prepared CuNWs decreases with increasing amounts of OM/OA and glucose but increases with the increasing temperature of the reaction. By adjusting the experimental parameters, we could achieve controlled synthesis of CuNWs and obtain high-quality CuNWs with different diameters of 45, 76, 85, 90, 100, 112, 135, and 175 nm.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chunhong Fu,Song Shu,Lin Hu,Zixun Liu,Zhouyang Yin,Xiaoshu Lv,Sen Zhang,Guangming Jiang
Selective electrocatalytic nitrate reduction reaction (NO 3 RR) to dinitrogen (N 2 ) is essential to nitrogen-cycle management and environmental sustainability. Palladium-based nanomaterials were extensively studied as NO 3 RR catalysts, but only delivered limited N 2 selectivity (<50%, NH 3 dominated the product). Here we report that, by tuning bimetallic composition of CuPd alloy nanowires, the Cu 28 Pd 72 nanowires deliver a near-unit conversion of NO 3 – -N and an unprecedented N 2 product selectivity of 75.9 ± 5.2% in treating 22.5 mg L −1 NO 3 – -N solution at −0.80 V vs. Ag/AgCl. Combining in-situ spectrometric measurements and theoretical calculations, we demonstrate that the contiguous Pd ensemble with a specific size at catalyst surface is essential to the N 2 formation via a kinetically-favored pathway of NO 2 * → NO* → N* → N 2 *. Alloying Pd with Cu is indispensable as Cu contributes to the N*-N* pairing by initiating the NO 3 – –NO 2 * conversion and lowering the H ads coverage on catalyst. This work discloses the key surface atomic structure for N 2 formation, and provides a guideline for the design of efficient NO 3 RR catalyst that enables selective NO 3 – –N 2 conversion.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Fengfeng Jia,Jiayue Dong,Xiyi Dai,Yuanqing Liu,Haoran Wang,Zhaoqing Lu
Hybrid film in nanoscale with high-flexibility, excellent-mechanical properties and outstanding EMI shielding capacity are desirable for telecommunication systems and precision equipment in aerospace, artificial intelligence and military. Herein, copper nanowire/Ti 3 C 2 T x /aramid nanofibers (CuNWs/MXene/ANFs) hybrid film with uniform-blended, twin-layered and triple-layered structure were developed via in steps vacuum-assisted filtration approach. Benefiting from ANFs building blocks and pleasant interface bonding, the uniform-blended structure film with CuNWs/MXene content of 60 wt% exhibited high-flexibility with folding number of ∼ 2000 times and ideal stability in oxidation resistance and sonication treatment. In addition, due to the layered structure and primordial dense substrate, the triple-layered film with CuNWs/MXene content of 60 wt% demonstrated outstanding mechanical properties with tensile strength of 165.72 MPa and toughness of 15.59 MJ/m 3 , conductivity of 4475 S·cm −1 and specific EMI effectiveness of 9120.6 dB·cm 2 ·g −1 at thickness of 43 μm (over the whole X band). Particularly, the comprehensive performance of three types of film was synthetically evaluated in seven parameters including SSE/t, toughness, strength, conductivity, thickness, flexibility, and stability, which opened up new evaluation for advance EMI shielding film. The experimental results indicated that the uniform-blended film has excellent potential for efficient, robust, flexible, and stable EMI shielding applications in military, smart electronics and aerospace.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-7
·
IF 5.578
Liu Yanjuan,Liu Xiaowei,Zhan Yongjie,Fan Haiming,Lu Yang
Recently helical nanostructures such as nanosprings and nanocoils have drawn great interests in nanotechnology, due to their unique morphologies and physical properties and they may be potential building blocks in sorts of electromechanical, magnetic, photoelectronic and plasmonic devices at micro/nanoscales. In this report, multi-turns copper nanocoils were synthesized through a modified solvothermal method, in which the mixture of water and N-methyl-2-pyrrolidone (NMP) were selected as reaction medium and copolymer poly(1-vinylpyrrolidone-co-vinyl acetate) (PVP/VA 64E) as reductant. In the liquid solution, nanosprings could be formed from relaxed nanocoils and demonstrated high elasticity. These nanocoils and nanosprings are of single crystalline structure, with the characteristics wire diameters ranging from tens to a few hundreds of nanometers and the ring/coil diameters mostly ~10–35 microns. Their growth and deformation mechanisms were then investigated and discussed along with that of previously reported single-turn copper nanorings. This work could be of importance for researchers working on synthesis and applications of novel 1-D helical nanomaterials and their functional devices.
研究领域:
纳米技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）