Journal
NANO LETTERS
Volume 15, Issue 11, Pages 7610-7615Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b03422
Keywords
Ultrathin copper nanowires; tris(trimethylsilyl)silane; growth mechanism; transparent conductor; reduced haze
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Funding
- BASF Corporation [20131459]
- Office of Science, Office of Basic Energy Sciences of the U.S. Department of Energy [DE-AC02-05CH11231]
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Colloidal metal nanowire based transparent conductors are excellent candidates to replace indium-tin-oxide (ITO) owing to their outstanding balance between transparency and conductivity, flexibility, and solution-processabllity. Copper stands out as a promising material candidate due to its high intrinsic conductivity and earth abundance. Here, we report a new synthetic approach, using tris(trimethylsilyl)silane as a mild reducing reagent, for synthesizing high-quality, ultrathin, and monodispersed copper nanowires, with an average diameter of 17.5 nm and a mean length of 17 mu m. A study of the growth mechanism using high-resolution transmission electron microscopy reveals that the copper nano-wires adopt a five-fold twinned structure and evolve from decahedral nanoseeds. Fabricated transparent conducting films exhibit excellent transparency and conductivity. An additional advantage of our nanowire transparent conductors is highlighted through reduced optical haze factors (forward light scattering) due to the small nanowire diameter.
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