Biologically inspired humidity sensor based on three-dimensional photonic crystals
- 6 September 2010
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 97 (10), 103701
- https://doi.org/10.1063/1.3486115
Abstract
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.This publication has 18 references indexed in Scilit:
- Structural colour printing using a magnetically tunable and lithographically fixable photonic crystalNature Photonics, 2009
- Inspired by nature: developments in biomimetic sensorsSensor Review, 2009
- Diffractive hygrochromic effect in the cuticle of the hercules beetleDynastes herculesNew Journal of Physics, 2008
- Biomimetics of photonic nanostructuresNature Nanotechnology, 2007
- A high-speed capacitive humidity sensor with on-chip thermal resetIEEE Transactions on Electron Devices, 2000
- A piezoresistive humidity sensorSensors and Actuators A: Physical, 1994
- Humidity Sensor Using Surface Acoustic Wave Delay Line with Hygroscopic Dielectric FilmJapanese Journal of Applied Physics, 1993
- Humidity sensors: Principles and applicationsSensors and Actuators, 1986
- Resonant-microbridge vapor sensorIEEE Transactions on Electron Devices, 1986
- A thin-film resistance humidity sensorSensors and Actuators, 1983