Controlled aqueous synthesis of ultra-long copper nanowires for stretchable transparent conducting electrode

Chahwan Hwang, Jihyun An, Byung Doo Choi, Kwanpyo Kim, Soon Won Jung, Kang Jun Baeg, Myung Gil Kim, Kang Min Ok, Jongin Hong

Research output: Contribution to journalArticle

52 Citations (Scopus)

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 μm (maximum length up to 260 μm) 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°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.

Original languageEnglish
Pages (from-to)1441-1447
Number of pages7
JournalJournal of Materials Chemistry C
Volume4
Issue number7
DOIs
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry

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