Electropolymerized polythiophene photoelectrodes with density-controlled gold nanoparticles

Yukina Takahashi; Sakiko Taura; Tsuyoshi Akiyama; Sunao Yamada

doi:10.1021/la300227j

Electropolymerized polythiophene photoelectrodes with density-controlled gold nanoparticles

Yukina Takahashi, Sakiko Taura, Tsuyoshi Akiyama, Sunao Yamada

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

A polythiophene thin film was fabricated on gold nanoparticle (AuNP)-deposited indium-tin-oxide (ITO) electrodes with electropolymerization, whereas AuNPs were predeposited on the ITO surface. A photocurrent via photoexcited polythiophene increased with AuNPs which was attributed to the localized surface plasmon resonance. Investigation of the AuNP-density dependence on the relative enhancement of photocurrent revealed the maximum effect at 14% of AuNP-density, while 68% of AuNP-density exhibited smaller photocurrent than the polythiophene electrode without AuNPs. We have revealed that the effects of AuNPs saturate in the fairly low density region, and that the excess AuNPs even in the range of submonolayer resulted in the decrement of photocurrents.

Original language	English
Pages (from-to)	9155-9160
Number of pages	6
Journal	Langmuir
Volume	28
Issue number	24
DOIs	https://doi.org/10.1021/la300227j
Publication status	Published - Jun 19 2012

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la300227j

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abstract = "A polythiophene thin film was fabricated on gold nanoparticle (AuNP)-deposited indium-tin-oxide (ITO) electrodes with electropolymerization, whereas AuNPs were predeposited on the ITO surface. A photocurrent via photoexcited polythiophene increased with AuNPs which was attributed to the localized surface plasmon resonance. Investigation of the AuNP-density dependence on the relative enhancement of photocurrent revealed the maximum effect at 14% of AuNP-density, while 68% of AuNP-density exhibited smaller photocurrent than the polythiophene electrode without AuNPs. We have revealed that the effects of AuNPs saturate in the fairly low density region, and that the excess AuNPs even in the range of submonolayer resulted in the decrement of photocurrents.",

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AU - Takahashi, Yukina

AU - Taura, Sakiko

AU - Akiyama, Tsuyoshi

AU - Yamada, Sunao

PY - 2012/6/19

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AB - A polythiophene thin film was fabricated on gold nanoparticle (AuNP)-deposited indium-tin-oxide (ITO) electrodes with electropolymerization, whereas AuNPs were predeposited on the ITO surface. A photocurrent via photoexcited polythiophene increased with AuNPs which was attributed to the localized surface plasmon resonance. Investigation of the AuNP-density dependence on the relative enhancement of photocurrent revealed the maximum effect at 14% of AuNP-density, while 68% of AuNP-density exhibited smaller photocurrent than the polythiophene electrode without AuNPs. We have revealed that the effects of AuNPs saturate in the fairly low density region, and that the excess AuNPs even in the range of submonolayer resulted in the decrement of photocurrents.

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Electropolymerized polythiophene photoelectrodes with density-controlled gold nanoparticles

Abstract

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