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Long-Wavelength Infrared Sensing by Cytochrome C Protein Thin Film Deposited by the Spin Coating Method
Graduate Institute of Photonics and Optoelectronics, National Taiwan University, No. 1, Roosevelt Road, Section 4, Taipei 10617, Taiwan
* Author to whom correspondence should be addressed.
Received: 7 October 2013; in revised form: 4 November 2013 / Accepted: 14 November 2013 / Published: 20 November 2013
Abstract: High infrared absorption, large temperature coefficient of resistance (TCR) and small 1/f noise are preferred characteristics for sensing materials used in bolometers. In this paper, we discuss a cytochrome c protein as a potential sensing material for long-wavelength bolometers. We simulated and experimentally proved high infrared absorption of cytochrome c in the wavelength between 8 μm and 14 μm. Cytochrome c thin films were deposited on a hydrophilic surface using the spin coating method. The resistance variation with temperature is measured and we show that the TCR of cytochrome c thin films is consistently higher than 20%. The measured values of 1/f noise were as low as 2.33 × 10–13 V2/Hz at 60 Hz. Finally, we test the reliability of cytochrome c by measuring the resistance changes over time under varying conditions. We found that cytochrome c thin films deteriorated significantly without appropriate packaging.
Keywords: bolometer; cytochrome c protein; long-wavelength infrared; temperature coefficient of resistance
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MDPI and ACS Style
Lai, B.-Y.; Chu, C.-H.; Su, G.-D.J. Long-Wavelength Infrared Sensing by Cytochrome C Protein Thin Film Deposited by the Spin Coating Method. Sensors 2013, 13, 15833-15845.
Lai B-Y, Chu C-H, Su G-DJ. Long-Wavelength Infrared Sensing by Cytochrome C Protein Thin Film Deposited by the Spin Coating Method. Sensors. 2013; 13(11):15833-15845.
Lai, Bo-Yu; Chu, Chung-Hao; Su, Guo-Dung J. 2013. "Long-Wavelength Infrared Sensing by Cytochrome C Protein Thin Film Deposited by the Spin Coating Method." Sensors 13, no. 11: 15833-15845.