Journal
NANOSCALE
Volume 7, Issue 40, Pages 16874-16879Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr04930j
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Funding
- Priority Academic Program Development of Jiangsu Higher Education Institutions [YX03001]
- Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)
- Synergistic Innovation Center for Organic Electronics and Information Displays
- Jiangsu Provincial NSF [BK20141424]
- Qing Lan Project of Jiangsu Province
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Coating nickel onto copper nanowires (Cu NWs) by one-pot synthesis is an efficient approach to improving the oxidation resistance of the nanowires. Because Ni is much less conductive than Cu, it is of great importance to understand the relationship between the thickness of the Ni coating layer and the properties of NWs. Here we demonstrate one-pot synthesis of Cu-Ni core-shell NWs with a tunable Ni thickness by simply varying the Cu and Ni mole ratio in the precursor. We have observed that an increase in Ni thickness decreases the aspect ratio, surface smoothness and network conductivity of the resulting NWs. However, Cu-Ni NWs with a thicker Ni layer display higher oxidation temperature. The optimal Cu-Ni NWs, which were prepared using a Cu2+/Ni2+ molar ratio of 1/1, have a Ni-layer thickness of about 10 nm and the onset oxidation temperature of 270 degrees C. The derived transparent conductive films present a transmittance of 76% and a sheet resistance of 300 Omega sq(-1). The flexible heater constructed from such high quality Cu-Ni NW films demonstrates effective performance in heating and defrosting.
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