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| Type |
Poster Presentation |
| Area |
재료화학 |
| Room No. |
포스터발표장 |
| Time |
4월 21일 (금요일) 13:00~14:30 |
| Code |
MAT.P-328 |
| Subject |
Cube-in-cube nanoparticles for super-radiant photoluminescence |
| Authors |
박정은*, 남좌민*
서울대학교 화학부, Korea
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| Abstract |
Photostability of photoluminescence (PL) from metal nanostructures such as non-photoblinking and non-photobleaching is beneficial to exploit them as reliable optical probes. The localized surface plasmon of plasmonic nanostructures strongly interact and concentrate light in the nanoscale allowing high absorption cross-section, which can compensate relatively low quantum yield (QY). However, recent studies on PL from plasmonic nanostructures have mostly been limited to lithographically fabricated structures or simple nanoparticles such as nanospheres or nanorods. Here we designed and synthesized interior nanogap-engineered cube-in-cube (CiC) nanoparticles (NPs) in a high yield via a galvanic void formation process.1 The CiC shows significantly enhanced PL and the PL intensity and QY of CiC NPs are 31 times and 16 times higher than those of Au nanocubes, respectively, which have the highest PL intensity and QY reported for metallic nanostructures. We attribute the intense PL to super-radiant character of plasmon mode arisen from plasmonic coupling between the core and the shell. Finally, we check the long-term photostability of the PL signal under continuous illumination for 1 h.
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| E-mail |
jepark@snu.ac.kr |
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119th General Meeting of the KCS