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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Refractive Index Sensitivity of Localized Surface Plasmon Resonance Inflection Points in Single Gold Nanoparticles with Different Shapes

2018년 8월 22일 11시 13분 58초
ANAL.P-353 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 19일 (금요일) 11:00~12:30
포스터 분석구두발표
Analytical Chemistry
저자 및
Hui Bin Jeon, Ji Won Ha*
Department of Chemistry, University of Ulsan, Korea
Plasmonic gold nanoparticles exhibit unique size- and shape-dependent optical properties, which is caused by the localized surface plasmon resonance (LSPR) collective oscillation of conduction electrons in gold with the incident light. In this study, we investigated the medium refractive index (RI)-dependent optical properties and LSPR sensitivity of single gold nanocubes (AuNCs) and gold nanospheres (AuNSs) of similar size (50 nm) under dark-field (DF) microscopy at the single particle level. We found that AuNCs with vertices have higher sensitivity to the medium RI than spherical AuNSs. Furthermore, the LSPR inflection point (IF) at the longer wavelength showed higher RI sensitivity in single particle scattering spectra. Therefore, we provide a deeper insight into the shape-dependent optical properties and RI sensitivity of LSPR IFs at single particle level, which can be beneficial and helpful for their uses in the development of sensitive biosensors.