Emission Enhancement of Water-Soluble Porphyrin Immobilized in DNA Ultrathin Films by Localized Surface Plasmon Resonance of Gold Nanoparticles
- Resource Type
- Journal Article
- Authors
- Hideki KAWAI; Hiroya MORITA; Kenji TAKEHARA; Naoki MATSUDA; Toshihiko NAGAMURA
- Source
- IEICE Transactions on Electronics. 2019, E102.C(2):100
- Subject
- DNA ultrathin films
fluorescence and phosphorescence enhancement
gold nanoparticles
localized surface plasmon resonance
- Language
- English
- ISSN
- 0916-8524
1745-1353
Photophysical properties of water-soluble porphyrin were studied in aqueous solutions with/without DNA and in DNA solid films. Ultrathin films were prepared from aqueous DNA solutions by a spin-coating method on glass or on gold nanoparticles (AuNPs). Remarkable enhancement of phosphorescence was observed for porphyrin immobilized in DNA films spin-coated on AuNPs, which was attributed to the electric field enhancement and the increased radiative rate by localized surface plasmon resonance of AuNPs.