Electrodeposition of thermally stable gold and silver nanoparticle ensembles through a thin alumina nanomask

Yukina Takahashi, Tetsu Tatsuma

研究成果: ジャーナルへの寄稿記事

61 引用 (Scopus)

抄録

Hemispheric gold or silver nanoparticle (Au and AgNP) ensembles were electrodeposited on a smooth ITO electrode through a thin Al2O 3 nanomask. The nanomask reduced the deviation in the particle size and interparticle distance. The absorption peak based on localized surface plasmon resonance (LSPR) of the AuNP ensemble redshifted with increasing environmental refractive index, suggesting that the ensemble would be used as a LSPR sensor for chemical analysis and bioanalysis. The Al2O 3 nanomask prevented the Au and AgNPs from thermal coalescence even at 500°C, and consequently, it improved thermal stabilities of nanoparticle ensembles. The ensembles exhibit LSPR-based absorption peak in the visible region, even after annealing. The nanomask allowed AgNPs, which are thermally and chemically less stable than AuNPs, to be coated with sintered TiO 2. The ITO/AgNP/TiO2 electrode thus obtained functions as a photocathode on the basis of photoinduced electron transfer from silver nanoparticles to TiO2.

元の言語英語
ページ(範囲)1494-1499
ページ数6
ジャーナルNanoscale
2
発行部数8
DOI
出版物ステータス出版済み - 8 1 2010
外部発表Yes

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Aluminum Oxide
Surface plasmon resonance
Silver
Electrodeposition
Gold
Alumina
Nanoparticles
Electrodes
Photocathodes
Coalescence
Refractive index
Thermodynamic stability
Particle size
Annealing
Electrons
Sensors
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

これを引用

Electrodeposition of thermally stable gold and silver nanoparticle ensembles through a thin alumina nanomask. / Takahashi, Yukina; Tatsuma, Tetsu.

:: Nanoscale, 巻 2, 番号 8, 01.08.2010, p. 1494-1499.

研究成果: ジャーナルへの寄稿記事

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