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| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Analytical Chemists Ⅰ |
| Room No. |
303호 |
| Time |
THU 09:20-: |
| Code |
ANAL1.O-3 |
| Subject |
Single Particle Study on Size-dependent Optical Properties of Gold Nanospheres beyond the Quasi-Static Limit |
| Authors |
서민정, 하지원*, 김근완, 이소영
울산대학교 화학과, Korea
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| Abstract |
Gustav Mie solved Maxwell’s equations to account for the absorption and scattering of spherical plasmonic particles in 1908. Since then much efforts have been devoted to the size dependent optical properties of gold nanoparticles. However, our understanding of the dark-field (DF) scattering properties of single gold nanospheres (AuNSs) beyond the quasi-static limit is still limited, and there have been no studies to elucidate their optical properties under differential interference contrast (DIC) microscopy. We therefore employed single particle DF and DIC microscopy to investigate the particle size dependency for AuNSs with different diameters from 100 nm to 400 nm beyond the quasi-static limit. We found that higher order plasmon resonances are observed in the single particle scattering spectra of large AuNSs (300 nm and 400 nm). Furthermore, the DF and DIC intensities were linearly increased as the particle size was varied from 100 nm to 400 nm. Therefore, the results provide useful experimental information about how the optical properties evolve with the particle size for designing the optimal plasmonic AuNSs or nanostructures in a particular use. |
| E-mail |
minjung7760@naver.com |
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119th General Meeting of the KCS