Emission Enhancement of Water-Soluble Porphyrin Immobilized in DNA Ultrathin Films by Localized Surface Plasmon Resonance of Gold Nanoparticles

Hiroya MORITA  Hideki KAWAI  Kenji TAKEHARA  Naoki MATSUDA  Toshihiko NAGAMURA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E102-C   No.2   pp.100-106
Publication Date: 2019/02/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.2018OMP0001
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Organic Molecular Electronics and Biotechnology)
Category: 
Keyword: 
fluorescence and phosphorescence enhancement,  DNA ultrathin films,  gold nanoparticles,  localized surface plasmon resonance,  

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Summary: 
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.