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

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Tip-enhanced Raman spectroscopy of thiol monolayers on gold nanoparticle

2019년 9월 9일 14시 51분 29초
PHYS.P-230 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
Physical Chemistry
저자 및
Hyunwoo Kim*, Yung Doug Suh1,*
Laboratory for Advanced Molecular Probing (LAMP), Korea Research Institute of Chemical Technology (KRICT), Korea
1Laboratory for Advanced Molecular Probing (LAMP), Korea Research Institute of Chemical Technology (KRICT), School of Chemical Engineering, SungKyunKwan University (SKKU), Korea

Functionalization of molecules on gold surface through thiol bonding provides fundamental building blocks for many fascinating complex nanostructures. Since self-assembled thiol monolayer plays key role in determining the yield and the quality of the complex nanostructures, chemical component analysis of gold surface in non-destructive way is highly desirable. In this presentation, we demonstrate tip-enhanced Raman spectroscopy on benzenethiol monolayer functionalized on gold nanoparticles. By positioning the atomic force microscopy probe coated with gold and silver respectively, in the close proximity of gold nanoparticles, Raman spectrum corresponding to benzenethiol is successfully acquired. Furthermore, we have observed clear differences in probe contamination trends depending on the coated metal species of the probe. Undesired bonding of analyte thiols to the surface of approached probes were more severe for gold coated probes comparing to silver coated ones. Our work demonstrates the surface characterization technique of gold nanoparticle based on tip-enhanced Raman spectroscopy with molecular monolayer sensitivity.