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
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
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页数:3
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