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Photonic-Crystal-Based Thin Film Sensor for Detecting Volatile Organic Compounds
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 Title & Authors
Photonic-Crystal-Based Thin Film Sensor for Detecting Volatile Organic Compounds
Chang, Hyung-Kwan; Park, Jungyul;
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 Abstract
Early detection of toxic gases, such as volatile organic compounds (VOCs), is important for safety and environmental protection. However, the conventional detection methods require long-term measurement times and expensive equipment. In this study, we propose a thin-film-type chemical sensor for VOCs, which consists of self-assembled monosize nanoparticles for 3-D photonic crystal structures and polydimthylsiloxane (PDMS) film. It is operated without any external power source, is truly portable, and has a fast response time. The structure color of the sensor changes when it is exposed to VOCs, because VOCs induce a swelling of the PDMS. Therefore, using this principle of color change, we can create a thin-film sensor for immediate detection of various types of VOCs. The proposed device evidences that a fast response time of just seconds, along with a clear color change, are successfully observed when the sensor is exposed to gas-phase VOCs.
 Keywords
Photonic Crystal;Volatile Organic Compounds;Polydimethylsiloxane(PDMS);
 Language
Korean
 Cited by
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