Electrochemical synthesis of mesoporous gold films toward mesospace-stimulated optical properties
Author
Li C.
Dag Ö.
Dao, T.D.
Nagao, T.
Sakamoto, Y.
Kimura, T.
Terasaki O.
Yamauchi, Y.
Date
2015Source Title
Nature Communications
Print ISSN
20411723
Publisher
Nature Publishing Group
Volume
6
Language
English
Type
ArticleItem Usage Stats
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Abstract
Mesoporous gold (Au) films with tunable pores are expected to provide fascinating optical properties stimulated by the mesospaces, but they have not been realized yet because of the difficulty of controlling the Au crystal growth. Here, we report a reliable soft-templating method to fabricate mesoporous Au films using stable micelles of diblock copolymers, with electrochemical deposition advantageous for precise control of Au crystal growth. Strong field enhancement takes place around the center of the uniform mesopores as well as on the walls between the pores, leading to the enhanced light scattering as well as surface-enhanced Raman scattering (SERS), which is understandable, for example, from Babinet principles applied for the reverse system of nanoparticle ensembles. © 2015 Macmillan Publishers Limited. All rights reserved.
Keywords
copolymergold nanoparticle
nanofilm
crystal property
electrochemical method
film
gold
light scattering
optical property
polymer
Article
crystallization
electrochemical analysis
light scattering
micelle
nanofabrication
optics
Raman spectrometry
synthesis