Electrochemical synthesis of mesoporous gold films toward mesospace-stimulated optical properties

Date
2015
Authors
Li C.
Dag Ö.
Dao, T.D.
Nagao, T.
Sakamoto, Y.
Kimura, T.
Terasaki O.
Yamauchi, Y.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Nature Communications
Print ISSN
20411723
Electronic ISSN
Publisher
Nature Publishing Group
Volume
6
Issue
Pages
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Series
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.

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Keywords
copolymer, gold 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
Citation
Published Version (Please cite this version)