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  • 02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 CTAB-modified AuNPs for sensitive SERS measurement

2019년 2월 14일 15시 31분 12초
PHYS.P-204 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (금요일) 11:00~12:30
Physical Chemistry
저자 및
Juhyun Yeo, Yoonsoo Pang*
Department of Chemistry, Gwangju Institute of Science and Technology, Korea
Gold nanoparticles (AuNP) are widely used in many applications including nanosensors for delivering chemical information in biological system. AuNPs are generally considered inert, nontoxic, and thus biocompatible, but the efficient surface adsorption on AuNPs is possible for molecules with a limited functional groups including carboxyl and thiol groups. Thus the surface modification of AuNPs for facile attachments of analytes onto AuNP is indispensable for the sensitive detection by SERS. In this research, a simple method of surface modification of citrate-reduced AuNPs by cetyl trimethylammonium bromide (CTAB) is introduced. SERS of hydroxyanthraquinones were greatly enhanced with the CTAB modified AuNP, where the efficient aggregation of AuNP occurs due to less negative surface charges of CTAB modified AuNP. SERS of 1,2-dihydroxyanthraquinone (alizarin) in either neutral or deprotonated form on the CTAB modified AuNP was obtained. Polyaromatic hydrocarbons (PAHs) generated in pyrolysis or incomplete combustion, and easily accumulated in soil or water in particulate matter. PAHs not readily biodegradable and often accumulated in organisms are generally known as immunosuppressant or carcinogen. We show that SERS detection of PAHs by CTAB modified AuNP can be used as an efficient analytical tool with high reproducibility and selectivity. A simple protocol for the detection and identification of various PAHs based on the Raman spectra will be introduced.