Biologically inspired humidity sensor based on three-dimensional photonic crystals

被引：92

作者：

Kim, Jae Hyun ^{[1
]}

Moon, Jun Hyuk ^{[2
]}

Lee, Seung-Yop ^{[1
]}

Park, Jungyul ^{[1
]}

机构：

[1] Sogang Univ, Dept Mech Engn, Seoul 121742, South Korea

[2] Sogang Univ, Dept Chem & Biomol Engn, Seoul 121742, South Korea

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 10期

基金：

新加坡国家研究基金会;

关键词：

HYDROGELS; SURFACES;

D O I：

10.1063/1.3486115

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This letter presents a biomimetic humidity sensor inspired by the humidity-dependent color change observed in the cuticle of the Hercules beetle. A thin-film-type humidity sensor with nanoporous structures (three-dimensional photonic crystals) mimicking the spongy multilayer in the beetles was designed and fabricated using the colloidal templating method and a hydrophilic surface treatment. The visible color of the fabricated humidity sensor changes from blue-green to red as the environmental humidity increases. The wavelength of reflected light that is predicted by Bragg's equation considering the effect of water absorption shows a good agreement with experimental results. (c) 2010 American Institute of Physics. [doi:10.1063/1.3486115]

引用

页数：3

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