材料科学
纳米颗粒
透射率
电容感应
压力传感器
光电子学
电容
纳米技术
透明度(行为)
分散性
光学
计算机科学
物理
高分子化学
化学
物理化学
操作系统
热力学
计算机安全
电极
作者
Hyeohn Kim,Gwangmook Kim,Tae-Hoon Kim,Sang‐Woo Lee,Donyoung Kang,Miriam Hwang,Youngcheol Chae,Shinill Kang,Hyungsuk Lee,Hong Gyu Park,Wooyoung Shim
出处
期刊:Small
[Wiley]
日期:2018-01-26
卷期号:14 (8)
被引量:110
标识
DOI:10.1002/smll.201703432
摘要
Abstract The fundamental challenge in designing transparent pressure sensors is the ideal combination of high optical transparency and high pressure sensitivity. Satisfying these competing demands is commonly achieved by a compromise between the transparency and usage of a patterned dielectric surface, which increases pressure sensitivity, but decreases transparency. Herein, a design strategy for fabricating high‐transparency and high‐sensitivity capacitive pressure sensors is proposed, which relies on the multiple states of nanoparticle dispersity resulting in enhanced surface roughness and light transmittance. We utilize two nanoparticle dispersion states on a surface: (i) homogeneous dispersion, where each nanoparticle (≈500 nm) with a size comparable to the visible light wavelength has low light scattering; and (ii) heterogeneous dispersion, where aggregated nanoparticles form a micrometer‐sized feature, increasing pressure sensitivity. This approach is experimentally verified using a nanoparticle‐dispersed polymer composite, which has high pressure sensitivity (1.0 kPa –1 ), and demonstrates excellent transparency (>95%). We demonstrate that the integration of nanoparticle‐dispersed capacitor elements into an array readily yields a real‐time pressure monitoring application and a fully functional touch device capable of acting as a pressure sensor‐based input device, thereby opening up new avenues to establish processing techniques that are effective on the nanoscale yet applicable to macroscopic processing.
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