| 학회 |
한국고분자학회 |
| 학술대회 |
2014년 가을 (10/06 ~ 10/08, 제주 ICC) |
| 권호 |
39권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Tunable plasmon coupling in particle-film systems for highly sensitive SERS sensors |
| 초록 |
The interaction between localized surface plasmon (LSP) and propagating surface plasmon polariton (SPP) have attracted considerable interest in surface-enhanced Raman scattering (SERS) sensor because the propagating SPP in metallic thin film can provide large field enhancement by modifying optical response of metal nanoparticles. Herein we introduce a plasmonic system based on Ag film over nanosphere (AgFON) substrates decorated with Au nanoparticles (AuNPs). Such particle on film structure support multiple field enhancements through gap plasmons by interparticle couplings and particle-film plasmons which contribute to the sensing capability of SERS chemical sensors. By controlling the size of nanospheres in the AgFON substrates, we also verified wavelength tunable SERS substrates. Finally, we demonstrate optimally designed SERS substrate based on AuNP-AgFON with 750 nm nanosphere which achieve 233 times stronger SERS enhancement than bare AgFON substrate. |
| 저자 |
이지원, 박소연, 고현협
|
| 소속 |
울산과학기술대 |
| 키워드 |
plasmon; particle on film; SERS; AgFON
|
| E-Mail |
|
