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

doi:10.1587/transele.2018OMP0001

Special Section on Recent Progress in Organic Molecular Electronics and Biotechnology

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

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Keywords: fluorescence and phosphorescence enhancement, DNA ultrathin films, gold nanoparticles, localized surface plasmon resonance

JOURNAL RESTRICTED ACCESS

2019 Volume E102.C Issue 2 Pages 100-106

DOI https://doi.org/10.1587/transele.2018OMP0001

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Abstract

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.

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