| 학회 | 한국재료학회 |
| 학술대회 | 2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 | 23권 1호 |
| 발표분야 | 3. 콜로이달 나노 입자의 자기 조립 기술 및 기능성 구조체 제조(Self-Assembly of Colloidal Nanocrystals into Functional Superst |
| 제목 | Plasmonic Hybrid Nanosystem for Molecular Detection based on Localized Surface Plasmon Resonance |
| 초록 | Nobel metal nanoparticles with different sizes and shapes have attracted a great deal of recent interest due to their unique optical properties as a result of localized surface plasmon resonances (LSPR) which produces a strong optical extinction which can be tuned throughout the visible and near-infrared wavelengths. The LSPR of plasmonic nanoparticles can serve as potential sensor substrates for the label-free sensing of a range of targets. It has also been shown that near-field enhancements at the sharp plasmonic edges and strengthening of inter-particle optical coupling, critical for signal enhancement, can be observed due to LSPR. The LSPR has been exploited to develop highly sensitive biological assays, and for molecular imaging, photodynamic therapy, drug delivery, and surface-enhanced Raman spectroscopy (SERS). We have fabricated substrates coated with these particles, and used their dielectric sensitivity to create an optical refractive index sensor based on a spectral extinction measurement and show that gold nanorods and bipyramids can be used as a label-free immunoassay for biological sensing. Also, a surfactant cetyltrimethylammonium bromide (CTAB) directs the synthesis of plasmonic gold nanoparticles to produce monodisperse nanoparticle shapes from small gold seed particles. The nature of the CTAB layer is therefore of considerable interest, since it is the key to understanding CTAB directed synthesis. Therefore, we use surface enhanced Raman spectroscopy (SERS) to probe the structure of the CTAB bilayer on gold nanorod. Lastly, hot electron injection into an exceptionally high mobility material can be realized in carbon–plasmonic hybrid nanosystems, which can be exploited for several front-edge applications including photovoltaics and molecular sensing at trace levels. Here, SERS-active substrates with plasmonic-carbon hybrid nanostructures for molecular detections will be also discussed. |
| 저자 | 이승현 |
| 소속 | 수원대 |
| 키워드 | Plasmonics; Gold Nanoparticles; Self-Assembly; Sensor |
