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Автор: Grafiati

Опубліковано: 8 червня 2024

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1

Wang, Yuanxing, Cailing Niu, and Yachuan Zhu. "Copper–Silver Bimetallic Nanowire Arrays for Electrochemical Reduction of Carbon Dioxide." Nanomaterials 9, no. 2 (January 30, 2019): 173. http://dx.doi.org/10.3390/nano9020173.

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The electrochemical conversion of carbon dioxide (CO2) into gaseous or liquid fuels has the potential to store renewable energies and reduce carbon emissions. Here, we report a three-step synthesis using Cu–Ag bimetallic nanowire arrays as catalysts for electrochemical reduction of CO2. CuO/Cu2O nanowires were first grown by thermal oxidation of copper mesh in ambient air and then reduced by annealing in the presence of hydrogen to form Cu nanowires. Cu–Ag bimetallic nanowires were then produced via galvanic replacement between Cu nanowires and the Ag+ precursor. The Cu–Ag nanowires showed enhanced catalytic performance over Cu nanowires for electrochemical reduction of CO2, which could be ascribed to the incorporation of Ag into Cu nanowires leading to suppression of hydrogen evolution. Our work provides a method for tuning the selectivity of copper nanocatalysts for CO2 reduction by controlling their composition.

2

Hwang, Byungil, Yurim Han, and Paolo Matteini. "BENDING FATIGUE BEHAVIOR OF AG NANOWIRE/CU THIN-FILM HYBRID INTERCONNECTS FOR WEARABLE ELECTRONICS." Facta Universitatis, Series: Mechanical Engineering 20, no. 3 (November 30, 2022): 553. http://dx.doi.org/10.22190/fume220730040h.

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Enhancing the mechanical reliability of metal interconnects is important for achieving highly reliable flexible/wearable electronic devices. In this study, Ag nanowire and Cu thin-film hybrid interconnects were explored as a novel concept to enhance mechanical reliability under bending fatigue. Bending fatigue tests were conducted on the Cu thin films and Cu/Ag nanowire/polyimide (CAP) interconnects. The increase in resistance was larger for the Cu thin films than for the CAP. The single-component Cu electrodes showed multiple crack initiation and propagation due to bending strain, which degraded the electrical conductivity. In CAP, however, no long-range cracks were observed, even after 300,000 cycles of bending, although a wavy structure was observed, probably due to the delamination of the Ag nanowires under repeated bending. Our study confirms that flexible Ag nanowire and metal thin-film hybrids can enhance the mechanical reliability of metal thin-film interconnects under bending fatigue.

3

Balela, Mary Donnabelle L., Salvacion B. Orgen, and Michael R. Tan. "Fabrication of Highly Flexible Copper Nanowires in Dual Surfactant Hydrothermal Process." Journal of Nanoscience and Nanotechnology 19, no. 11 (November 1, 2019): 7156–62. http://dx.doi.org/10.1166/jnn.2019.16714.

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Highly flexible Cu nanowires were successfully synthesized by a dual-surfactant hydrothermal process using oleylamine and oleic acid. The ultra-long Cu nanowires have a mean diameter as low as 82.3 nm and lengths greater than 300 μm. It was found that reaction time and oleylamine concentration significantly influenced the morphology and phase composition of the Cu products. At a shorter reaction time (about 4 hours), pentagonal bipyramidal CU2O particles were precipitated together with the Cu nanowires. A longer reaction time of 12 hours resulted in smooth and purely metallic Cu nanowires. It is possible that CU2O served as an intermediate phase to control the activity of free CU2+ ions in the solution. On the other hand, a higher oleylamine concentration generally produced longer Cu nanowires. Cu nanowires conducting electrode with a sheet resistance of about 157.0 Ω/□ were fabricated. However, the optical transmittance of the electrode at 550 nm was very low (<20%) because of the agglomeration of the Cu nanowires. The addition of a small quantity of Ag nanowires in the Cu nanowire ink markedly improved the appearance and electrical properties of the resulting electrode.

4

Chang, Tung-Hao, Hsin-Wei Di, Yu-Cheng Chang, and Chia-Man Chou. "Ag Nanoparticles Decorated CuO@RF Core-Shell Nanowires for High-Performance Surface-Enhanced Raman Spectroscopy Application." Molecules 27, no. 23 (December 2, 2022): 8460. http://dx.doi.org/10.3390/molecules27238460.

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Vertical-aligned CuO nanowires have been directly fabricated on Cu foil through a facile thermal oxidation process by a hotplate at 550 °C for 6 h under ambient conditions. The intermediate layer of resorcinol–formaldehyde (RF) and silver (Ag) nanoparticles can be sequentially deposited on Cu nanowires to form CuO@RF@Ag core-shell nanowires by a two-step wet chemical approach. The appropriate resorcinol weight and silver nitrate concentration can be favorable to grow the CuO@RF@Ag nanowires with higher surface-enhanced Raman scattering (SERS) enhancement for detecting rhodamine 6G (R6G) molecules. Compared with CuO@Ag nanowires grown by ion sputtering, CuO@RF@Ag nanowires exhibited a higher SERS enhancement factor of 5.33 × 108 and a lower detection limit (10−12 M) for detecting R6G molecules. This result is ascribed to the CuO@RF@Ag nanowires with higher-density hot spots and surface-active sites for enhanced high SERS enhancement, good reproducibility, and uniformity. Furthermore, the CuO@RF@Ag nanowires can also reveal a high-sensitivity SERS-active substrate for detecting amoxicillin (10−10 M) and 5-fluorouracil (10−7 M). CuO@RF@Ag nanowires exhibit a simple fabrication process, high SERS sensitivity, high reproducibility, high uniformity, and low detection limit, which are helpful for the practical application of SERS in different fields.

5

Xu, Jiaxing, Jianjun Gao, Hongling Qin, Zhiyang Liu, Linpeng Zhu, Haibin Geng, Ligang Yao, and Zhilong Zhao. "Cu Nanowires and Nanoporous Ag Matrix Fabricated through Directional Solidification and Selective Dissolution of Ag–Cu Eutectic Alloys." Materials 15, no. 22 (November 18, 2022): 8189. http://dx.doi.org/10.3390/ma15228189.

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Cu nanowires and a nanoporous Ag matrix were fabricated through directional solidification and selective dissolution of Ag–Cu eutectic alloys. Ag-39.9at.%Cu eutectic alloys were directionally solidified at growth rates of 14, 25, and 34 μm/s at a temperature gradient of 10 K/cm. The Cu phase in the Ag matrix gradually changed from lamellar to fibrous with an increase in the growth rate. The Ag matrix phase was selectively dissolved, and Cu nanowires of 300–600 nm in diameter and tens of microns in length were prepared in 0.1 M borate buffer with a pH of 9.18 at a constant potential of 0.7 V (vs. SCE). The nanoporous Ag matrix was fabricated through selective dissolution of Cu fiber phase in 0.1 M acetate buffer with a pH of 6.0 at a constant potential of 0.5 V (vs. SCE). The diameter of Ag pores decreased with increasing growth rate. The diameter and depth of Ag pores increased when corrosion time was extended. The depth of the pores was 30 μm after 12 h.

6

Sun, Yang, Fengying Zhang, Li Xu, Zhilei Yin, and Xinyu Song. "Roughness-controlled copper nanowires and Cu nanowires–Ag heterostructures: synthesis and their enhanced catalysis." J. Mater. Chem. A 2, no. 43 (2014): 18583–92. http://dx.doi.org/10.1039/c4ta03689a.

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7

Yan, Siyi, Qiaohui Yue, and Jiangang Ma. "Rapid fabrication of silver–cuprous oxide core–shell nanowires for visible light photocatalysts." CrystEngComm 23, no. 1 (2021): 24–29. http://dx.doi.org/10.1039/d0ce01430c.

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8

Yao, J. L., G. P. Pan, K. H. Xue, D. Y. Wu, B. Ren, D. M. Sun, J. Tang, X. Xu, and Z. Q. Tian. "A complementary study of surface-enhanced Raman scattering and metal nanorod arrays." Pure and Applied Chemistry 72, no. 1-2 (January 1, 2000): 221–28. http://dx.doi.org/10.1351/pac200072010221.

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The two-dimensional arrays of various metal nanowires with diameters ranging from 15 to 70 nm have been fabricated by electrodepositing metals of Cu, Ag, Au, Ni, and Co into the nanoholes of the anodic aluminum oxide (AAO) films, followed by partial removal of the film. The strong surface-enhanced Raman scattering (SERS) effects were observed from the metal nanowire arrays including Ni, Co metals that were normally considered to be non-SERS active substrates. It has been shown that metal nanowire arrays can serve as very good SERS active substrates, especially for transition metals. The SERS intensity of the probe molecule adsorbed at the nanowires depends critically on the length of the nanowires explored at the surface. And the band frequency is very sensitive to the diameter, which reflects the change in the electronic property of metal nanowires. Applying this probe molecule strategy, SERS could develop into a diagnostic tool of metal nanowires (nanorods).

9

Exconde, Mark Keanu James, and Mary Donnabelle L. Balela. "Parametric Study of the Galvanic Reaction Parameters on the Synthesis of 1-Dimensional Cu-Ag Nanostructures." Materials Science Forum 1097 (September 27, 2023): 131–37. http://dx.doi.org/10.4028/p-d6zsd0.

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Recently, copper (Cu) and silver (Ag) nanowires have been widely employed as conductive fillers in flexible electronic devices due to their high aspect ratios leading to the formation of conductive networks in a polymeric substrate. This study combined Cu and Ag as a 1-dimensional nanostructures through galvanic replacement with a core-shell configuration. The effects of the galvanic replacement factors on the Cu-Ag core-shell nanostructures morphology was studied by varying the reaction time, temperature, and Ag concentration. SEM images show a more extensive Cu dealloying and Kirkendall voiding with longer reaction times, resulting in the Cu core dissolution. Homogenous nucleation of Ag occurs at higher reaction temperatures and Ag concentrations, producing separate Ag particles.

10

Cárdenas Cortez, Olda Alexia, José de Jesús Pérez Bueno, Yolanda Casados Mexicano, Maria Luisa Mendoza López, Carlos Hernández Rodríguez, Alejandra Xochitl Maldonado Pérez, David Cruz Alejandre, et al. "CoO, Cu, and Ag Nanoparticles on Silicon Nanowires with Photocatalytic Activity for the Degradation of Dyes." Sustainability 14, no. 20 (October 17, 2022): 13361. http://dx.doi.org/10.3390/su142013361.

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Photocatalytic semiconductors require maintaining stability and pursuing higher efficiencies. The studied systems were silicon nanowires (SiNWs), silicon nanowires with cobalt oxide nanoparticles (SiNWs-CoONPs), and silicon nanowires with copper nanoparticles (SiNWs-CuNPs). SiNWs were synthesized by metal-assisted chemical etching (MACE) from silicon wafers keeping the remaining silver nanoparticles for all three sample types. The nanowires were about 23–30 µm in length. CoONPs and CuNPs were deposited on SiNWs by the autocatalytic reduction processes (electroless). There were many factors in the process that affect the resulting structures and degradation efficiencies. This work shows the degradation of methyl orange (MO) together with the chemisorption of methylene blue (MB), and rhodamine 6G (Rh6G) by direct illumination with visible radiation. The MO degradation kinetics were in the sequence SiNWs-CuNPs (88.9%) > SiNWs (85.3%) > SiNWs-CoONPs (49.3%), with the SiNWs-CuNPs having slightly faster kinetics. However, SiNWs-CoONPs have slow degradation kinetics. The chemisorptions of MB and Rh6G were SiNWs-CuNPs (87.2%; 86.88%) > SiNWs (86%; 87%) > SiNWs-CoONPs (17.3%; 12%), showing dye desorptions together with lower chemisorption capacities. This work shows iridescence in optical microscopy images by the visible light interference caused by the spaces between the nanowire bundles.

11

Weng, Wei-Lun, Chin-Yu Hsu, Jheng-Syun Lee, Hsin-Hsin Fan, and Chien-Neng Liao. "Twin-mediated epitaxial growth of highly lattice-mismatched Cu/Ag core–shell nanowires." Nanoscale 10, no. 21 (2018): 9862–66. http://dx.doi.org/10.1039/c8nr02875c.

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12

Qiao, Zhen, Arben Kojtari, Jacob Babinec, and Hai-Feng Ji. "Synthesis of A Silver Nanowire Array on Cu-BTC MOF Micropillars." Sci 1, no. 1 (November 30, 2018): 4. http://dx.doi.org/10.3390/sci1010004.

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An array of Ag nanowires has been prepared from a facile, templated approach on Cu(BTC) (1,3,5-benzenetricarboxylic acid) metal organic framework (MOF) micropillars. The Ag-deposited scaffolding material may be used to prepare electronic or optoelectronic devices for various applications.

13

Qiao, Zhen, Arben Kojtari, Jacob Babinec, and Hai-Feng Ji. "Synthesis of A Silver Nanowire Array on Cu-BTC MOF Micropillars." Sci 1, no. 1 (November 30, 2018): 4. http://dx.doi.org/10.3390/sci1010004.v1.

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An array of Ag nanowires has been prepared from a facile, templated approach on Cu(BTC) (1,3,5-benzenetricarboxylic acid) metal organic framework (MOF) micropillars. The Ag-deposited scaffolding material may be used to prepare electronic or optoelectronic devices for various applications.

14

Lee, Suhyun, Chien Wern, and Sung Yi. "Novel Fabrication of Silver-Coated Copper Nanowires with Organic Compound Solution." Materials 15, no. 3 (February 1, 2022): 1135. http://dx.doi.org/10.3390/ma15031135.

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Copper nanowires and Cu-Ag nanowires have various potential applications, such as transparent conductive film, flexible electronics, and conductive filler. In this study, we developed a new green fabrication method for silver-coated copper nanowires using methylsulfonylmethane (DMSO2), which is an environmentally friendly chemical at the food-grade level, to replace toxic chemicals, including ammonia, in the silver coating process. Copper nanowires were synthesized under various reaction temperatures and concentrations of hydrazine (N2H4), ethylenediamine (EDA), sodium hydroxide (NaOH), and copper precursor. The reaction temperature higher than 70 °C caused the oxidation of copper products and evaporation of the sample solution. The optimal conditions to synthesize copper nanowires more than 18 µm in length and 25–45 nm in diameter were determined: 9 M of NaOH, 50 µL of EDA, 17 mM of CuCl2, 5.7 mM of N2H4, and 70 °C reaction temperature. Cu-Ag nanowires, which have about a 12 nm thick silver shell, were successfully fabricated at room temperature under 1 mM of silver nitrate (AgNO3) and 1 wt % of DMSO2. Synthesis conditions for copper and silver-coated copper nanowires have been optimized.

15

Jiang, Zhi, Yanhong Tian, Su Ding, Jiayue Wen, and Chenxi Wang. "Facile synthesis of Cu–Ag hybrid nanowires with strong surface-enhanced Raman scattering sensitivity." CrystEngComm 18, no. 7 (2016): 1200–1206. http://dx.doi.org/10.1039/c5ce02221e.

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16

Brun, Christophe, Corentin Carmignani, Cheikh Tidiane-Diagne, Simona Torrengo, Pierre-Henri Elchinger, Patrick Reynaud, Aurélie Thuaire, et al. "First Integration Steps of Cu-based DNA Nanowires for interconnections." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, DPC (January 1, 2016): 000650–79. http://dx.doi.org/10.4071/2016dpc-tp15.

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In the wide range of emergent nanotechnologies, DNA-based microelectronics has shown an important potential for components miniaturization and auto-assembling approaches applicable to future silicon-based electronic circuits [1]. In order to pursue the Moore's law, interconnections must be indeed addressed at the nanoscale, with a good control of their size, location and electrical & thermal performances. With its natural auto-assembling property, its 2-nm-double-helix diameter and its several metallization possibilities, DNA is a promising candidate to build bio-inspired electronic components [1]. DNA has been first metallized by Erez Braun in 1998 using a silver electroless method [2]. Since 1998, several groups have worked on DNA metallization using different chemistries with metals such as Pd, Pt, Au, Ag and Cu [3]. Most of these works have presented electrical and morphological characterizations of few metallic nanowires. However, in order to initiate DNA-based-nanowires integration on silicon technologies, we must start to implement nanowires on silicon at wafer scale. We have thus developed a platform based on silicon technologies providing morphological and electrical characterizations of copper nanowires built from DNA [4]. This platform will allow us to simultaneously characterize a large number of nanowires, returning a statistic of their electrical performance, and thus allowing the optimization of the copper nanowire metallization process. Two main approaches are proposed to fabricate and contact a large number of copper nanowires with metallic electrodes in order to study their electrical behavior. In both approaches, a linear 16-μm-length DNA phage is used. The first approach consists in aligning DNA wires on a hydrophobic silicon oxide surface by a method called DNA combing. On a second time, aligned DNA wires are all metallized by electroless process [4]. 5-nm-diameter copper nanowires have been so far achieved by this method and focus on improving the metallization process is currently at stake. Finally, Ti/Au electrodes are fabricated on the nanowires by a classical lift-off process in order to electrically connect them. The advantage of this approach is the very accurate nanowires alignment and their homogeneity over the surface. However, the low number of aligned nanowires per surface unit (10–20μm−2) and the high electrical resistance of each (>kohms) makes the electrical characterization quite complex. On the other side, the second approach consists in fabricating the Ti/Au electrodes first and then aligning or randomly depositing the copper nanowires at their surface. Same protocols are used to align and metallize the DNA nanowires for both approaches. The advantage of this second approach is a higher nanowire density deposited on the electrodes. However, a higher contact resistance and a lower control of nanowires alignment are obtained. Both approaches are currently explored and permit to explore a wide range of parameters for copper nanowires metallization process improvement.

17

Zhang, Qian, Man Li, Chunling Qin, Zhifeng Wang, Weimin Zhao, and Yongyan Li. "Flexible Free-Standing CuxO/Ag2O (x = 1, 2) Nanowires Integrated with Nanoporous Cu-Ag Network Composite for Glucose Sensing." Nanomaterials 10, no. 2 (February 19, 2020): 357. http://dx.doi.org/10.3390/nano10020357.

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To improve glucose electrocatalytic performance, one efficient manner is to develop a novel Cu-Ag bimetallic composite with fertile porosity and unique architecture. Herein, the self-supported electrode with CuxO/Ag2O (x = 1, 2) nanowires grown in-situ on a nanoporous Cu-Ag network (CuxO/Ag2O@NP-CuAg) has been successfully designed by a facile two-step approach. The integrated hierarchical porous structure, the tip-converged CuxO/Ag2O nanowires combined with the interconnected porous conductive substrate, are favorable to provide more reactive sites and improve ions or electrons transportation. Compared with monometallic Cu2O nanowires integrated with nanoporous Cu matrix (Cu2O@NP-Cu), the bimetallic CuxO/Ag2O@NP-CuAg composites exhibit the enhanced electrocatalytic performance for glucose. Moreover, the higher sensitivity of ~1.49 mA mM−1 cm−2 in conjunction with a wider linear range of 17 mM for the CuxO/Ag2O@NP-CuAg electrode anodized for 10 min are attributed to the synergistic effect of porous structure and bimetallic CuxO/Ag2O nanowires. Particularly, the integrated CuxO/Ag2O@NP-CuAg composites possess good flexibility, which has been reported for the first time. Accordingly, the CuxO/Ag2O@NP-CuAg with excellent glucose electrocatalytic performance and good flexibility is promising to further develop as a candidate electrode material of glucose sensors.

18

Schnedlitz, Martin, Maximilian Lasserus, Daniel Knez, Andreas W. Hauser, Ferdinand Hofer, and Wolfgang E. Ernst. "Thermally induced breakup of metallic nanowires: experiment and theory." Physical Chemistry Chemical Physics 19, no. 14 (2017): 9402–8. http://dx.doi.org/10.1039/c7cp00463j.

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19

Khan, Babar Shahzad, Aiman Mukhtar, Tahir Mehmood, and Ming Tan. "Polarization Curves of Electrodepositing Ag and Cu Nanowires." Journal of Nanoscience and Nanotechnology 16, no. 9 (September 1, 2016): 9896–900. http://dx.doi.org/10.1166/jnn.2016.12569.

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20

Wei, Yong, Song Chen, Yong Lin, Zimei Yang, and Lan Liu. "Cu–Ag core–shell nanowires for electronic skin with a petal molded microstructure." Journal of Materials Chemistry C 3, no. 37 (2015): 9594–602. http://dx.doi.org/10.1039/c5tc01723h.

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21

He, Xin, Ruihui He, Qiuming Lan, Feng Duan, Jundong Xiao, Mingxia Song, Mei Zhang, Yeqing Chen, and Yang Li. "A Facile Fabrication of Silver-Coated Copper Nanowires by Galvanic Replacement." Journal of Nanomaterials 2016 (2016): 1–8. http://dx.doi.org/10.1155/2016/2127980.

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We demonstrated a general strategy to fabricate silver-coated copper nanowires by a galvanic replacement, which is guided by the chemical principle that metal ions (silver ions) with a relatively high reduction potential can galvanically etch nanostructure made from a less metal (copper). Well-dispersed and high-yielded copper nanowires were initially synthesized and then introduced into silver-ammonia solution for the growth of silver nanocrystals on the nanowire surfaces under vigorous oscillation. The results of X-ray diffraction, scanning electron microscope, and transmission electron microscope revealed that the silver nanocrystals were uniformly distributed on the copper nanowire surfaces to form Cu-Ag heterostructures. The concentration of silver-ammonia solution and the time of replacement reaction determine the size and density of the silver nanocrystals. Our investigation might pave the way to the synthesis of other bimetallic nanostructures via a facile, fast, and economical route.

22

Chen, Jung-Hsuan, Shen-Chuan Lo, Shu-Chi Hsu, and Chun-Yao Hsu. "Fabrication and Characteristics of SnAgCu Alloy Nanowires for Electrical Connection Application." Micromachines 9, no. 12 (December 5, 2018): 644. http://dx.doi.org/10.3390/mi9120644.

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As electronic products become more functional, the devices are required to provide better performances and meet ever smaller form factor requirements. To achieve a higher I/O density within the smallest form factor package, applying nanotechniques to electronic packaging can be regarded as a possible approach in microelectronic technology. Sn-3.0 wt% Ag-0.5 wt% Cu (SAC305) is a common solder material of electrical connections in microelectronic devices. In this study, SAC305 alloy nanowire was fabricated in a porous alumina membrane with a pore diameter of 50 nm by the pressure casting method. The crystal structure and composition analyses of SAC305 nanowires show that the main structure of the nanowire is β-Sn, and the intermetallic compound, Ag3Sn, locates randomly but always appears on the top of the nanowire. Furthermore, differential scanning calorimetry (DSC) results indicate the melting point of SAC305 alloy nanowire is around 227.7 °C. The melting point of SAC305 alloy nanowire is significantly higher than that of SAC305 bulk alloy (219.4 °C). It is supposed that the non-uniform phase distribution and composite difference between the nanowires causes the change of melting temperature.

23

Brandstetter, Thomas, Thorsten Wagner, Daniel R. Fritz, and Peter Zeppenfeld. "Tunable Ag Nanowires Grown on Cu(110)-Based Templates." Journal of Physical Chemistry Letters 1, no. 7 (March 5, 2010): 1026–29. http://dx.doi.org/10.1021/jz100068e.

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24

Ding, X., G. Briggs, W. Zhou, Q. Chen, and L.-M. Peng. "In situgrowth and characterization of Ag and Cu nanowires." Nanotechnology 17, no. 11 (May 19, 2006): S376—S380. http://dx.doi.org/10.1088/0957-4484/17/11/s24.

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25

Sun, Guanliang, Ning Li, Dan Wang, Guanchen Xu, Xingshuang Zhang, Hongyu Gong, Dongwei Li, et al. "A Novel 3D Hierarchical Plasmonic Functional Cu@Co3O4@Ag Array as Intelligent SERS Sensing Platform with Trace Droplet Rapid Detection Ability for Pesticide Residue Detection on Fruits and Vegetables." Nanomaterials 11, no. 12 (December 20, 2021): 3460. http://dx.doi.org/10.3390/nano11123460.

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Rapid and effective detection of pesticide residues from complex surfaces of fruits and vegetables has important significance. Herein, we report a novel three-dimensional (3D) hierarchical porous functional surface-enhanced Raman scattering (SERS) substrate, which is fabricated by successive two-step hydrothermal synthesis strategy of silver nanoparticles (Ag NPs) and cobalt oxide nanowires (Co3O4 NWs) on the 3D copper foam framework as Cu@Co3O4@Ag-H. The strategy offers a new avenue for localized plasmonic materials distribution and construction, which exhibits better morphology regulation ability and SERS activity (or hotspots engineering) than physical spurring obtained Cu@Co3O4@Ag-S. The developed Cu@Co3O4@Ag-H possesses large surface area and rich hotspots, which contributes to the excellent SERS performance, including homogeneity (RSD of 7.8%), sensitivity (enhancement factor, EF of 2.24 × 108) and stability. The Cu@Co3O4@Ag-H not only provides plenty of Electromagnetic enhancement (EM) hotspots but also the trace detection capability for droplet rapid sensing within 2 s. Cu@Co3O4@Ag-H substrate is further developed as an effective SERS sensing platform for pesticide residues detection on the surfaces of fruits and vegetables with excellent LOD of 0.1 ppm, which is lower than the most similar reported works. This work offers new potential for bioassay, disease POCT diagnosis, national security, wearable flexible devices, energy storage and other related fields.

26

Huang, Pei Hsing, and Yi Fan Wu. "Molecular Dynamics Studies of Cold Welding of FCC Metallic Nanowires." Advanced Materials Research 875-877 (February 2014): 1367–71. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.1367.

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The atomistic-scale cold welding processes for metallic nanowires (NWs) are studied using embedded-atom molecular dynamics (MD) simulations. The mechanical behavior and structural evolution of the FCC metallic nanowires, including Au, Ag, and Cu materials, that experienced a mechanical stretching break and solid-phase pressure welding process, were investigated. The welding temperatures (Tw) ranging from 100 to 900 K were systemically investigated on the effects of welding strength. The ratio of welding strength, Rws, defined as the ratio between the welding strength and the original yield strength of NWs, was employed to identify the welding quality. Simulation results show that the Rws of Au NWs is better than those of Ag and Cu welded at room temperature; however, for welding at high temperatures (600~900 K) the Rws value of Ag NWs is the best. The Rws values of Au NWs using cold welding show less variance than with high temperature welding, reflecting that the application of cold-welding on the Au NWs is highly feasible. The Rws values for NWs with small diameters are generally higher than those with large diameters. The breaking places of the tensile test for the post-welded NWs didnt occur at the welding region, indicating that the broken wires can be robustly reconnected through solid-phase mechanically-assisted welding methods.

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Ma, F., and K. W. Xu. "Size-dependent theoretical tensile strength and other mechanical properties of [001] oriented Au, Ag, and Cu nanowires." Journal of Materials Research 21, no. 11 (November 2006): 2810–16. http://dx.doi.org/10.1557/jmr.2006.0342.

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A uniaxial tensile loading process was simulated on rectangular [001] oriented single-crystal Au, Ag, and Cu nanowires using the modified embedded atom method. The calculated theoretical tensile strength as well as elastic modulus and “yield strength” increases with decreasing wire width almost logarithmically, which is qualitatively consistent with relevant experimental results. According to the present observed linear relationship among these three parameters, we think, the size dependent mechanical behaviors in nanowires may be due to the enhanced attraction between atoms, which is caused by the accumulation of electron charges along wire axial direction.

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Fang, Ran-Ran, Li-Juan Guo, Wei Wang, Cai-Feng Hou, and Hui Li. "Atomic-scale simulation of nanojoining of Cu-Ag core-shell nanowires." Physics Letters A 405 (July 2021): 127425. http://dx.doi.org/10.1016/j.physleta.2021.127425.

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29

Zhu, X. R., C. M. Wang, J. M. Xue, Q. B. Fu, Z. Jiao, W. D. Wang, and G. Y. Qin. "Preparation of Ag/Cu Janus Nanowires: Electrodeposition in Track-Etched Polymer Templates." Asian Journal of Chemistry 26, no. 23 (2014): 8075–78. http://dx.doi.org/10.14233/ajchem.2014.17107.

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30

Zhu, X. R., C. M. Wang, Q. B. Fu, Z. Jiao, W. D. Wang, G. Y. Qin, and J. M. Xue. "Preparation of Ag/Cu Janus nanowires: Electrodeposition in track-etched polymer templates." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 356-357 (August 2015): 57–61. http://dx.doi.org/10.1016/j.nimb.2015.04.061.

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31

Stewart, Ian E., Shengrong Ye, Zuofeng Chen, Patrick F. Flowers, and Benjamin J. Wiley. "Synthesis of Cu–Ag, Cu–Au, and Cu–Pt Core–Shell Nanowires and Their Use in Transparent Conducting Films." Chemistry of Materials 27, no. 22 (November 11, 2015): 7788–94. http://dx.doi.org/10.1021/acs.chemmater.5b03709.

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32

Luo, Jia, Michael Florian Peter Wagner, Nils Ulrich, Peter Kopold, Christina Trautmann, and Maria Eugenia Toimil Molares. "(Digital Presentation) Electrochemical Conversion of Cu Nanowires Synthesized By Electrodeposition in Track-Etched Templates to HKUST-1." ECS Meeting Abstracts MA2022-02, no. 23 (October 9, 2022): 977. http://dx.doi.org/10.1149/ma2022-0223977mtgabs.

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Metal-organic frameworks (MOFs) are a novel type of nanoporous materials that have attracted widespread attention over the past two decades [1]. Cu-based metal-organic frameworks such as Cu3(BTC)2 (also known as HKUST-1) are one of the most famous MOF representatives, which exhibit a huge open porosity and thus a remarkably capacity to store and uptake different gases [2, 3]. Recently, increasing efforts are devoted toward finding synthetic routes that enable downsizing MOF crystals to the nanoscale. Achieving control over the size and shape of nanoMOFs and finding ways to assemble them is essential for their exploitation in integrated devices such as sensors, gas separation membranes or photoelectrodes. In this study we explore the conversion of free-standing arrays Cu nanowires with controlled diameter and length synthesized by electrodeposition in etched ion-track membranes into HKUST-1. In a first process step, free-standing Cu wires are produced by dissolving the ion-track polymer template. In a second step, the wires are converted into HKUST-1 structures by electrochemical oxidation. Applying 2.5 V versus a Cu counter electrode, the Cu nanowires are oxidatively dissolved and the MOF is built up as the as-formed Cu2+ ions bind to the BTC3− ligands in the electrolyte solution. The morphology and crystallinity of the samples at different transformation stages is investigated by scanning electron microscopy (Fig. 1) and transmission electron microscopy, respectively. X-ray diffraction spectra measured at different conversion times reveal the appearance of the characteristic reflections of HKUST-1. These results will be compared with previous studies of the transformation of Cu nanowires to HKUST-1 nanowires inside the polymer membrane [4]. Figure 1: SEM images of cylindrical Cu nanowires (a) before and (b) during the electrochemical conversion process, and (c) of a representative octahedral particle after complete conversion to HKUST-1. References [1] Freund R, Canossa S, Cohen SM, Yan W, Deng et al. Angewandte Chemie International Edition. (2021) 2: 23946-23974 [2] Chui SS-Y, Lo SM-F, Charmant JP, Orpen AG, Williams ID. Science. (1999) 283:1148-50. [3] Li H, Li L, Lin R-B, Zhou W, Zhang Z, Xiang S, et al. EnergyChem. (2019) 1:100006. [4] Caddeo F, Vogt R, Weil D, Sigle W, Toimil-Molares ME, Maijenburg AW. ACS applied materials & interfaces . (2019)11:25378-87. Figure 1

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Qin, Chunling, Mengmeng Zhang, Baoe Li, Yongyan Li, and Zhifeng Wang. "Ag particles modified CuxO (x = 1, 2) nanowires on nanoporous Cu-Ag bimetal network for antibacterial applications." Materials Letters 258 (January 2020): 126823. http://dx.doi.org/10.1016/j.matlet.2019.126823.

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34

Cho, Hyunjoo, Seungjun Chung, and Jaewook Jeong. "Fabrication and characterization of low-sheet-resistance and stable stretchable electrodes employing metal and metal nanowire hybrid structure." Flexible and Printed Electronics 6, no. 4 (December 1, 2021): 045013. http://dx.doi.org/10.1088/2058-8585/ac3ffd.

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Abstract Stretchable electrodes with high stretching capability and low sheet resistance were developed using a metal/silver nanowires (AgNWs)/metal hybrid structure on a poly-dimethylsiloxane substrate. A low sheet resistance around 100 mΩ square−1 was achieved using the hybrid structures of Ag/AgNWs/Ag and Cu/AgNWs/Cu electrodes. The stretching capability under single and multi-cycling strain conditions was greatly improved due the AgNWs in-between top and bottom metal electrodes. The random connection of AgNWs generates new current path over the various cracks and wavy structures of the metal electrodes, which improve the initial resistance, the stretching capability under single strain up to 16%, and the resistance stability under 100 times cycling strain for the electrodes. Using a simple resistor model, it was shown that the hybrid structure is effective to improve the stretching capability of the stretchable metal electrodes due to the random connection of AgNWs in-between the metal electrodes.

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Lah, Nurul Akmal Che, and Sonia Trigueros. "Synthesis and modelling of the mechanical properties of Ag, Au and Cu nanowires." Science and Technology of Advanced Materials 20, no. 1 (March 22, 2019): 225–61. http://dx.doi.org/10.1080/14686996.2019.1585145.

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36

Delogu, Francesco. "Atomistic simulation of surface segregation processes in unstrained and strained Ag–Cu nanowires." Materials Chemistry and Physics 116, no. 1 (July 2009): 112–18. http://dx.doi.org/10.1016/j.matchemphys.2009.02.050.

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LIANG, C., K. TERABE, T. HASEGAWA, and M. AONO. "Template synthesis of M/M2S (M=Ag, Cu) hetero-nanowires by electrochemical technique." Solid State Ionics 177, no. 26-32 (October 31, 2006): 2527–31. http://dx.doi.org/10.1016/j.ssi.2006.02.037.

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38

Zaminpayma, Esmaeil. "Interaction between P3HT and Au/Ag/Cu/Al nanowires: A molecular dynamics study." Computational Materials Science 75 (July 2013): 24–28. http://dx.doi.org/10.1016/j.commatsci.2013.03.040.

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39

Wall, Johanna, Didem Ag Seleci, Feranika Schworm, Ronja Neuberger, Martin Link, Matthias Hufnagel, Paul Schumacher, et al. "Comparison of Metal-Based Nanoparticles and Nanowires: Solubility, Reactivity, Bioavailability and Cellular Toxicity." Nanomaterials 12, no. 1 (December 31, 2021): 147. http://dx.doi.org/10.3390/nano12010147.

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While the toxicity of metal-based nanoparticles (NP) has been investigated in an increasing number of studies, little is known about metal-based fibrous materials, so-called nanowires (NWs). Within the present study, the physico-chemical properties of particulate and fibrous nanomaterials based on Cu, CuO, Ni, and Ag as well as TiO2 and CeO2 NP were characterized and compared with respect to abiotic metal ion release in different physiologically relevant media as well as acellular reactivity. While none of the materials was soluble at neutral pH in artificial alveolar fluid (AAF), Cu, CuO, and Ni-based materials displayed distinct dissolution under the acidic conditions found in artificial lysosomal fluids (ALF and PSF). Subsequently, four different cell lines were applied to compare cytotoxicity as well as intracellular metal ion release in the cytoplasm and nucleus. Both cytotoxicity and bioavailability reflected the acellular dissolution rates in physiological lysosomal media (pH 4.5); only Ag-based materials showed no or very low acellular solubility, but pronounced intracellular bioavailability and cytotoxicity, leading to particularly high concentrations in the nucleus. In conclusion, in spite of some quantitative differences, the intracellular bioavailability as well as toxicity is mostly driven by the respective metal and is less modulated by the shape of the respective NP or NW.

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Switzer, Jay, Avishek Banik, and Bin Luo. "(Invited) Epitaxial Electrodeposition of Wide Bandgap Semiconductors for Transparent and Flexible Electronics." ECS Meeting Abstracts MA2022-01, no. 23 (July 7, 2022): 1128. http://dx.doi.org/10.1149/ma2022-01231128mtgabs.

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Single-crystal silicon is the bedrock of semiconductor devices due to the high crystalline perfection that minimizes electron-hole recombination, and the dense SiOx native oxide that minimizes surface states. One issue with the material is that it is both brittle and opaque. There is interest in moving beyond the planar structure of conventional Si-based chips to produce flexible and transparent electronic devices such as wearable solar cells, sensors, and flexible displays. In this talk we will discuss the electrodeposition of transparent, wide bandgap semiconductors such as ZnO, CuI, and CuSCN that can be produced as epitaxial films on single-crystal and single-crystal-like substrates. These epitaxial films have an orientation that is controlled by the substrate, with electronic properties that mimic those of single crystals. The talk will emphasize the electrodeposition of the wide bandgap hole conductors CuI and CuSCN. They are electrodeposited by electrochemically reducing Cu(II)EDTA to Cu(I) in the presence of either iodide or thiocyanate anions. Cubic CuI deposits as dense films on Si(111), and CuSCN deposits as nanowires on Au(111). The CuI is epitaxial on the Si(111) in spite of a 2.4 nm thick interfacial SiOx layer. The rectifying p-CuI/SiOx/n-Si heterojunction diode shows an ideality factor of 1.5, a built-in voltage of 0.67 V, and a barrier height of 0.91 eV. The crystal structure and morphology of the CuSCN nanowires can be controlled by varying the SCN-/Cu(II) ratio in solution (see Fig. 1). We also show that the epitaxial films can be removed by a simple lift-off procedure to produce single-crystal-like flexible foils of transparent semiconductors. Fig. 1 – Controlling the crystal structure and morphology of CuSCN nanowires through the SCN-/Cu(II) ratio in solution. Top micrographs are of rhombohedral CuSCN deposited using SCN-/Cu(II) = 4, and the bottom micrographs are of hexagonal CuSCN deposited using SCN-/Cu(II) = 2. The nanowires were both on Au(111), and were deposited at a potential of -0.4 V vs. Ag/AgCl. Figure 1

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Rakhsha, Amir Hossein, Hossein Abdizadeh, Erfan Pourshaban, Mohammad Reza Golobostanfard, Valmor Roberto Mastelaro, and Maziar Montazerian. "Ag and Cu doped ZnO nanowires: A pH-Controlled synthesis via chemical bath deposition." Materialia 5 (March 2019): 100212. http://dx.doi.org/10.1016/j.mtla.2019.100212.

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42

Choi, Yo-Han, Young-Soo Chae, and Yong-Seog Kim. "Effects of the Parameters Influencing the Nucleation and Growth of Ag and Cu Nanowires." Journal of Nanoscience and Nanotechnology 17, no. 10 (October 1, 2017): 7301–6. http://dx.doi.org/10.1166/jnn.2017.14716.

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43

Ryu, Sung‐Myung, and Chunghee Nam. "Shape‐dependent Optical Properties of Ag Nanowires Synthesized Using Pt and Cu Seed Materials." Bulletin of the Korean Chemical Society 41, no. 2 (January 17, 2020): 184–89. http://dx.doi.org/10.1002/bkcs.11950.

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44

Zhang, Renyun, and Magnus Engholm. "Recent Progress on the Fabrication and Properties of Silver Nanowire-Based Transparent Electrodes." Nanomaterials 8, no. 8 (August 18, 2018): 628. http://dx.doi.org/10.3390/nano8080628.

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Transparent electrodes (TEs) made of metallic nanowires, such as Ag, Au, Cu, and Ni, are attracting increasing attention for several reasons: (1) they can act as a substitute for tin oxide-based TEs such as indium-tin oxide (ITO) and fluorine-doped tin oxide (FTO); (2) various methods exist for fabricating such TEs such as filtration, spraying, and Meyer bar coating; (3) greater compatibility with different substrates can be achieved due to the variety of fabrication methods; and (4) extra functions in addition to serving as electrodes, such as catalytic abilities, can be obtained due to the metals of which the TEs are composed. There are a large number of applications for TEs, ranging from electronics and sensors to biomedical devices. This short review is a summary of recent progress, mainly over the past five years, on silver nanowire-based TEs. The focus of the review is on theory development, mechanical, chemical, and thermal stability as well as optical properties. The many applications of TEs are outside the scope of this review.

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Fichthorn, Kristen A., Zihao Chen, Zhifeng Chen, Robert M. Rioux, Myung Jun Kim, and Benjamin J. Wiley. "Understanding the Solution-Phase Growth of Cu and Ag Nanowires and Nanocubes from First Principles." Langmuir 37, no. 15 (April 9, 2021): 4419–31. http://dx.doi.org/10.1021/acs.langmuir.1c00384.

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46

Sarkar, Jit, and Subhas Ganguly. "Investigation of the thermal properties of Cu–Ag core-shell nanowires using molecular dynamics simulation." Physica B: Condensed Matter 636 (July 2022): 413876. http://dx.doi.org/10.1016/j.physb.2022.413876.

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47

Zhang, Bowen, Wanli Li, Masaya Nogi, Chuantong Chen, Yang Yang, Tohru Sugahara, Hirotaka Koga, and Katsuaki Suganuma. "Alloying and Embedding of Cu-Core/Ag-Shell Nanowires for Ultrastable Stretchable and Transparent Electrodes." ACS Applied Materials & Interfaces 11, no. 20 (May 6, 2019): 18540–47. http://dx.doi.org/10.1021/acsami.9b04169.

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48

高, 廷红. "Influence of Ag/Cu Micro-Doping on the Fusing Time and Fusing Position of Au Nanowires." Modern Physics 07, no. 05 (2017): 175–82. http://dx.doi.org/10.12677/mp.2017.75020.

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Amin, Aya, and Ali El-dissouky. "One-step synthesis of novel Cu2ZnNiO3 complex oxide nanowires with tuned band gap for photoelectrochemical water splitting." Journal of Applied Crystallography 53, no. 6 (October 13, 2020): 1425–33. http://dx.doi.org/10.1107/s1600576720012200.

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Although alloying and nanostructuring offer a great opportunity for enhancing photoelectrochemical behavior and band gap tuning, these methods have not been investigated extensively. This article reports the synthesis of Cu2ZnNiO3 complex oxide nanowires (∼200 nm) grown on German silver alloy via a one-step optimized hydrothermal route and their utilization to split water photoelectrochemically. Surface characterizations were used to elucidate the formation mechanism of the Cu2ZnNiO3 complex oxide nanowires. The nanowires exhibited an exceptional visible light absorption extending from 400 to 1400 nm wavelengths with a tuned band gap of ∼2.88 eV calculated from the corresponding Tauc plot. In tests to split water photoelectrochemically, the nanowires generated a significant photocurrent of up to −2.5 mA cm−2 at −0.8 V versus Ag/AgCl and exhibited an exceptional photostability which exceeded 2 h under light-off conditions with no photocurrent decay. Band edge positions related to water redox potentials were estimated via Mott–Schottky and diffuse reflectance spectroscopy analysis with the density of charge carriers reaching as high as 5.15 × 1018 cm−3. Moreover, the nanowires generated ∼1100 µmol of H2 in 5 h. These photoelectrochemical results are much higher than the reported values for similar structures of copper oxide, zinc oxide and nickel oxide separately under the same conditions, which can be attributed to the advantages of Cu, Zn and Ni oxides (such as visible light absorption, photostability, and efficient charge carrier generation and transport) being combined in one single material. These promising results make German silver a robust material toward photoelectrochemical water splitting.

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Elrashidi, Ali. "Light Harvesting in Silicon Nanowires Solar Cells by Using Graphene Layer and Plasmonic Nanoparticles." Applied Sciences 12, no. 5 (February 28, 2022): 2519. http://dx.doi.org/10.3390/app12052519.

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In this work, a silicon nanowire solar cell for efficient light harvesting in the visible and near-infrared regions is introduced. In this structure, the silicon nanowires (SiNWs) are coated with a graphene layer and plasmonic nanoparticles are distributed on the top surface of the silicon substrate layer. The proposed structure is simulated using the finite difference time domain (FDTD) method to determine the performance of the solar cell by calculating the open-circuit voltage, fill factor, short-circuit current density, and power conversion efficiency. The absorbed light energy is compared for different nanoparticle materials, namely Au, Ag, Al, and Cu, and Au NPs give the best performance. Different values of the radius of the Au NP are simulated, namely 30, 40, 50, and 60 nm, to determine the optimum radius, and the effect of excess carrier concentration on the solar cell performance is also tested. The obtained open-circuit voltage is 0.63 V, fill factor is 0.73, short-circuit current density is 41.7 mA/cm2, and power conversion efficiency is 19.0%. The proposed SiNW solar cell improves the overall efficiency by almost 60%. Furthermore, the effects of the NW length and distance between NWs are also studied in this work. Finally, the distribution of the optical power in different layers along the solar cell and for different solar cell structures is also illustrated in this paper.