Plasmon modes hybridization influence on Nano-bio-sensors specification
IEEE Transactions on Nanotechnology, cilt.12, sa.5, ss.858-866, 2013 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 12 Sayı: 5
- Basım Tarihi: 2013
- Doi Numarası: 10.1109/tnano.2013.2277760
- Dergi Adı: IEEE Transactions on Nanotechnology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.858-866
- Anahtar Kelimeler: Indocyanine (ICY), nanoparticles (NPs), near-infrared (NIR), quantum dot (QD), surface plasmon resonance (SPR)
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Hayır
Özet
In this paper, the interaction between surface plasmon resonance and fluorescence of the dye molecule is investigated and simulated. Due to the severe change of the nanoparticle-dye system's optical properties, it can be used in the important biomedical applications. The presence of a nanoparticle in the surface plasmon resonance state locally concentrates electromagnetic waves of the incident field and can increase the absorption and emission fluorescence of a dye molecule (as adding an antenna to a receiver). Therefore, the motivation of this study is the use of the nanoparticle's plasmon hybridization modes to reach to the highest near-field augmentation which is essential to the improvement of the dye's lifetime and its quantum efficiency for deep-tissue imaging which dramatically need augmentation of the dye's emitted photon. Specifically, we have investigated some nanoparticles which have a strong plasmon resonance to extend into visible to near-infrared spectra. Furthermore, the splitting of the surface plasmon into two distinctive modes as a result of the difference in polarization between the nanoparticle's outer and inner surface are probed. We utilize Si/SiO 2/Ag as a novel proposal of core/shell nanoparticle for the emission enhancement of weak emitting fluorophores. The fluorescent enhancement of dye molecules as a function of distance from the nanoparticle's surface, NPs' radius, and spacer thickness between the inner and outer shell is studied. © 2002-2012 IEEE.