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Electrochemical synthesis of mesoporous gold films toward mesospace-stimulated optical properties
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Electrochemical synthesis of mesoporous gold films toward mesospace-stimulated optical properties
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Journal Article
Electrochemical synthesis of mesoporous gold films toward mesospace-stimulated optical properties
2015
Overview
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.
The selective growth of mesoporous gold thin films with control over the porosity is a challenging task. Here, the authors report a soft-templating method allowing the growth of tunable, mesoporous gold films and examine their optical properties
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Pub. Group
