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학술발표회초록보기

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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Chemical Sensor Based on Porous Silicon Dual Transducers

등록일
2012년 3월 2일 14시 57분 58초
접수번호
1570
발표코드
INOR.P-268 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
김성룡, 손홍래
조선대학교 화학과, Korea
Novel porous silicon (PSi) chip exhibiting dual optical properties, both Fabry-Perot fringe (optical reflectivity) and photoluminescence had been developed and used as chemical sensors. PSi samples were prepared by an electrochemical etch of p-type silicon. The PSi was illuminated with a 300 W tungsten lamp for the duration of etch. Etching was carried out as a two-electrode galvanostatic procedure at an anodic current. The surface of PSi was characterized by FT-IR instrument. The porosity of samples was about 80%. Three different types of PSi, fresh PSi (Si-H terminated), oxidized PSi (Si-OH terminated), and surface-derivatized PSi (Si-R terminated) were prepared by the thermal oxidation and hydrosilylation. Then the samples were exposed to the vapor of various organics, such as chloroform, hexane, methanol, benzene, isopropanol, and toluene. Both reflectivity and photoluminescence were simultaneously measured under the exposure of organic vapors. These surface-modified samples showed unique respond in both reflectivity and photoluminescence with various organic vapors. While polar molecules exhibit greater quenching photoluminescence, molecules having higher vapor pressure show greater red shift for reflectivity. The possible application of PSi as sensors will be discussed.

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