Controlled aqueous synthesis of ultra-long copper nanowires for stretchable transparent conducting electrode
- Authors
- Hwang, Chahwan; An, Jihyun; Choi, Byung Doo; Kim, Kwanpyo; Jung, Soon-Won; Baeg, Kang-Jun; Kim, Myung-Gil; Ok, Kang Min; Hong, Jongin
- Issue Date
- Feb-2016
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY C, v.4, no.7, pp 1441 - 1447
- Pages
- 7
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY C
- Volume
- 4
- Number
- 7
- Start Page
- 1441
- End Page
- 1447
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/8658
- DOI
- 10.1039/c5tc03614c
- ISSN
- 2050-7526
2050-7534
- Abstract
- The environmentally benign synthesis of ultra-long copper nanowires with successful control of diameter and length for stretchable transparent conducting electrodes (TCEs) is reported. Ultra-long copper nanowires (CuNWs) with an average length of 92.5 mu m (maximum length up to 260 mu m) and an average diameter of 47 nm were synthesized using environmentally friendly water-alcohol mixtures and L-ascorbic acid as a reducing agent. A facile removal of insulating surface layers, such as organic capping molecules and copper oxide/hydroxide, by short-chain organic acid treatment allowed low contact resistance between the CuNWs without post-reductive treatment at elevated temperatures. The CuNWs were directly spray-coated on glass or polydimethylsiloxane (PDMS) at a low processing temperature of 130 degrees C. The CuNW TCE on a glass substrate exhibited a low sheet resistance of 23.1 Ohm sq(-1) and a high optical transmittance of 84.1% at 550 nm. Furthermore, the CuNWs were directly spray-coated on stretchable PDMS, which showed a low sheet resistance of 4.1 Ohm sq(-1) and a high optical transmittance of 70% at 550 nm.
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