期刊
RSC ADVANCES
卷 6, 期 62, 页码 S7434-S7440出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra11467a
关键词
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资金
- National Research Foundation of Korea (NRF) [2012-0008779]
- Global Frontier R&D Program on Center for Multiscale Energy System [2012-054172]
- Nano-Material Technology Development Program - Ministry of Science, ICT Future [R2011-003-2009]
- R&D Convergence Program, R&D program of MSIP/COMPA [2015K000216]
- Institute of Advanced Machinery and Design at Seoul National University (SNU-IAMD)
The most viable flexible and transparent conductor alternative to indium tin oxide (ITO) is metal mesh on plastic including metal micro-lines at regular spacing and metal nanowire percolation networks. Applications in flexible and transparent devices have been hampered by either moire pattern problems caused by regular patterning or low mechanical robustness of the nanowire network. In this study, we demonstrate a novel class of flexible transparent conductor based on metal nanowire micro-bundled networks at random patterns. Original random patterns are prepared from controlled random cracking of high-stress silicon nitride on the silicon substrate, and employed as repetitively usable master molds with independently controllable pattern density and linewidth. Silver nanowires are subsequently placed in the random crack channels through a facile solution process and transferred to the polymer substrate with UV curable epoxy resin. The resultant flexible and transparent conductor, spanning over wafer scale at high reproducibility, not only exhibits enhanced mechanical robustness upon repeated bending or scratching, which often occurs when used as touch-screen panel, but also is free from the moire pattern problem due to the random nature of nanowire bundle patterns. Further application of the resultant flexible transparent conductor as a touch-screen panel confirms easy large-scale fabrication of this robust and flexible transparent conductor.
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