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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Controllable Gold Nanoparticles Ablated by Pulse Laser in Organic Solvent for SERS Substrate

2019년 8월 29일 16시 08분 00초
PHYS.P-218 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
Physical Chemistry
저자 및
Hyeyeon Lee, Seung Heon Lee, Seung Jun Lee, Juhyeon Park, Tae Ho Kim, Myong Yong Choi*
Department of Chemistry, Gyeongsang National University, Korea
Surface Enhanced Raman Spectroscopy (SERS) has currently investigated to analyze microscopic signals in sensors such as biosensing. Among many attempts to enhance the SERS effect, experiments to create hotspots of metal particles have been reported in various ways. In this study, we have synthesized Au nanoparticles (NPs) which have thin carbon layers with constant thickness by using ns-laser and investigated SERS effect. Controllable Au NPs are generated by ablating Au plate in water, acetonitrile and mixture in order to control carbon layers and remove amorphous carbon. We have investigated size and shape of Au NPs controlled in two solvents with transmission electron microscopy (TEM), UV-vis spectroscopy, micro-raman. By mixing two different solvents, the number of carbon layers on Au NPs are decreased, and it is found that the gaps of < 1 nm created by the carbon shell led to a strong plasmon effect. Since gaps which induce hotspot are formed, enhanced SERS signals from Au NPs treated by pulse laser are obtained by using Rhodamine 6G (R6G) as a target material.