Hong Sukjoon, Yeo Junyeob, Lee Jinhwan, Lee Habeom, Lee Phillip, Lee Seung S, Ko Seung Hwan
J Nanosci Nanotechnol. 2015 Mar;15(3):2317-23. doi: 10.1166/jnn.2015.9493.
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.
我们介绍了一种通过对金属纳米线渗流网络进行选择性激光烧蚀来增强图案化金属透明导体功能的简便方法。通过在银纳米线渗流网络上扫描聚焦纳秒脉冲激光，无需任何传统化学蚀刻或光刻步骤，即可选择性地烧蚀和图案化银纳米线。通过改变诸如重复频率和功率等各种激光参数，可在渗流网络上轻松创建各种任意图案的银纳米线透明导体。通过数字选择性激光烧蚀改变导体图案设计，可轻松调整渗流网络透明导体的宏观光学和电学性质。对通过烧蚀工艺制备的基于银纳米线的电极线的进一步研究证实，导电薄膜的一般关系在窄宽度下不成立，这在需要高分辨率图案的应用中应予以考虑。最后，作为概念验证，通过对金属纳米线渗流网络进行选择性激光烧蚀，展示了一种具有菱形图案的电容式触摸传感器。
