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Photonic-Crystal-Based Thin Film Sensor for Detecting Volatile Organic Compounds

광결정 기반의 휘발성 유기 화합물 검지 박막 센서

  • Received : 2015.10.02
  • Accepted : 2016.01.22
  • Published : 2016.03.01

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)

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Acknowledgement

Grant : 녹내장 치료 및 안압측정이 가능한 스마트 콘텍트렌즈 소재 개발

Supported by : 한국연구재단, 산업통상자원부