Issue 21, 2010
From the journal:

Journal of Materials Chemistry

Layer-by-layer assembly of gold nanoparticles with titaniananosheets: control of plasmon resonance and photovoltaic properties

Nobuyuki Sakai,a   Takayoshi Sasaki,b   Kazuki Matsubaraa  and  Tetsu Tatsuma*ac  

* Corresponding authors

a Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo, Japan
E-mail: tatsuma@iis.u-tokyo.ac.jp
Tel: +81 3-5452-6336

b International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, Japan

c PRESTO, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama, Japan

Abstract

Layer-by-layer assembled multilayer films composed of gold nanoparticles (Au NPs) and titania nanosheets were constructed on a glass or ITO substrate in an arbitrary layering order. Coverage of Au NPs with 1 to 3 layers of titania nanosheets enhances their plasmon resonance-based absorption and photocurrents. Absorption can be improved further by alternate stacking of Au NPs and titania nanosheets. Plasmon resonance of the multilayer can be enhanced and redshifted by interlayer plasmon coupling via a single intervening nanosheet layer, whereas the coupling can be suppressed, if necessary, by two or more layers of nanosheets. Direction of the photocurrents can also be switched; annealed ITO/titania nanosheet/Au NP electrodes exhibit anodic photocurrents and annealed ITO/Au NP/titania nanosheet electrodes exhibit cathodic photocurrents.

Graphical abstract: Layer-by-layer assembly of gold nanoparticles with titania nanosheets: control of plasmon resonance and photovoltaic properties

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Article information

DOI
https://doi.org/10.1039/C0JM00135J
Article type
Paper
Submitted
24 Jan 2010
Accepted
10 Mar 2010
First published
12 Apr 2010

J. Mater. Chem., 2010,20, 4371-4378

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Layer-by-layer assembly of gold nanoparticles with titania nanosheets: control of plasmon resonance and photovoltaic properties

N. Sakai, T. Sasaki, K. Matsubara and T. Tatsuma, J. Mater. Chem., 2010, 20, 4371 DOI: 10.1039/C0JM00135J

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