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

Cuiling Li, Ömer Dag, Thang Duy Dao, Tadaaki Nagao, Yasuhiro Sakamoto, Tatsuo Kimura, Osamu Terasaki and Yusuke Yamauchi ()
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Cuiling Li: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Ömer Dag: Bilkent University
Thang Duy Dao: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Tadaaki Nagao: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)
Yasuhiro Sakamoto: PRESTO and CREST, Japan Science and Technology Agency (JST)
Tatsuo Kimura: Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Osamu Terasaki: Graduate School of EEWS (BK21Plus), KAIST
Yusuke Yamauchi: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: 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.

Date: 2015
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DOI: 10.1038/ncomms7608

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