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

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      Author(s)
      Li C.
      Dag Ö.
      Dao, T.D.
      Nagao, T.
      Sakamoto, Y.
      Kimura, T.
      Terasaki O.
      Yamauchi, Y.
      Date
      2015
      Source Title
      Nature Communications
      Print ISSN
      20411723
      Publisher
      Nature Publishing Group
      Volume
      6
      Language
      English
      Type
      Article
      Item Usage Stats
      133
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      119
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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
      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
      Permalink
      http://hdl.handle.net/11693/22225
      Published Version (Please cite this version)
      http://dx.doi.org/10.1038/ncomms7608
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      • Department of Chemistry 640
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