杰纳斯
材料科学
纳米线
弹性体
纳米技术
弯曲
双层
复合材料
作者
Yan Wang,Shu Gong,Daniel E. Gómez,Yunzhi Ling,Lim Wei Yap,George P. Simon,Wenlong Cheng
出处
期刊:ACS Nano
[American Chemical Society]
日期:2018-07-26
卷期号:12 (8): 8717-8722
被引量:46
标识
DOI:10.1021/acsnano.8b04748
摘要
We report on unconventional Janus material properties of vertically aligned gold nanowire films that conduct electricity and interact with light and water in drastically different ways on its two opposing sides. These Janus-like properties originate from enokitake-like nanowire structures, causing the nanoparticle side ("head") to behave like bulk gold, yet the opposing nanowire side ("tail") behaves as discontinuous nanophases. Due to this Janus film structure, its head side is hydrophilic but its tail side is hydrophobic; its head side reflects light like bulk gold, yet its tail side is a broadband superabsorber; its tail side is less conductive but with tunable resistance. More importantly, the elastomer-bonded Janus film exhibits unusual mechatronic properties when being stretched, bent, and pressed. The tail-bonded elastomeric sheet can be stretched up to ∼800% strain while remaining conductive, which is about 10-fold that of head-bonded film. In addition, it is also more sensitive to bending forces and point loads than the corresponding tail-bonded film. We further demonstrate the versatility of nanowire-based Janus films for pressure sensors using bilayer structures in three different assembly layouts.
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