Largely enhanced photocurrent via gap-mode plasmon resonance by a nanocomposite layer of silver nanoparticles and porphyrin derivatives fabricated on an electrode

Photocurrent generation efficiency via the photoactive dyes, porphyrins, was strongly enhanced by construction of a nanocomposite structure, which consists of an undercoat layer of (3-mercaptopropyl)trimethoxysilane and densely and homogeneously attached silver nanoparticles on an electrode. The emp...

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Bibliographic Details
Published in:Applied physics letters 2012-08, Vol.101 (6), p.63103
Main Authors: Kanaizuka, Katsuhiko, Yagyu, Shigeta, Ishizaki, Manabu, Kon, Hiroki, Togashi, Takanari, Sakamoto, Masatomi, Kurihara, Masato
Format: Article
Language:English
Subjects:
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Photocurrent
Photoelectric effect
Plasmons
Silver
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Summary:Photocurrent generation efficiency via the photoactive dyes, porphyrins, was strongly enhanced by construction of a nanocomposite structure, which consists of an undercoat layer of (3-mercaptopropyl)trimethoxysilane and densely and homogeneously attached silver nanoparticles on an electrode. The employed 5 -(4-carboxyphenyl)-10,15,20-triphenylporphyrins, 1, were embedded on the silver nanoparticle surface through their carboxylate moiety. The photo-absorption of 1 was significantly influenced by normal and gap-mode plasmon bands. The photocurrent of the nanocomposite structure was more strongly enhanced via the Q band excitation of 1, overlapped with the gap-mode plasmon band in the absorption wavelength range, and also showed stable photocurrent.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4742870