Selective laser direct patterning of silver nanowire percolation network transparent conductor for capacitive touch panel

Sukjoon Hong, Junyeob Yeo, Jinhwan Lee, Habeom Lee, Phillip Lee, Seung S. Lee, Seung Hwan Ko

Research output: Contribution to journalArticlepeer-review

90 Scopus citations

Abstract

We introduce a facile method to enhance the functionality of a patterned metallic transparent conductor through selective laser ablation of metal nanowire percolation network. By scanning focused nanosecond pulsed laser on silver nanowire percolation network, silver nanowires are selectively ablated and patterned without using any conventional chemical etching or photolithography steps. Various arbitrary patterns of silver nanowire transparent conductors are readily created on the percolation network by changing various laser parameters such as repetition rate and power. The macroscopic optical and electrical properties of the percolation network transparent conductor can be easily tuned by changing the conductor pattern design via digital selective laser ablation. Further investigation on the silver nanowire based electrode line prepared by the ablation process substantiates that the general relation for a conducting thin film fails at a narrow width, which should be considered for the applications that requires a high resolution patterns. Finally, as a proof of concept, a capacitive touch sensor with diamond patterns has been demonstrated by selective laser ablation of metal nanowire percolation network.

Original languageEnglish
Pages (from-to)2317-2323
Number of pages7
JournalJournal of Nanoscience and Nanotechnology
Volume15
Issue number3
DOIs
StatePublished - 1 Jan 2015

Keywords

  • Capacitive touch sensor
  • Metal nanowire
  • Percolation network
  • Selective laser ablation
  • Transparent conductor

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