Sensors 2013, 13(11), 15833-15845; doi:10.3390/s131115833
Article

Long-Wavelength Infrared Sensing by Cytochrome C Protein Thin Film Deposited by the Spin Coating Method

Received: 7 October 2013; in revised form: 4 November 2013 / Accepted: 14 November 2013 / Published: 20 November 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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 × 1013 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.

AMA Style

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.

Chicago/Turabian Style

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.

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