TY - JOUR
T1 - Electrochemical synthesis of mesoporous gold films toward mesospace-stimulated optical properties
AU - Li, Cuiling
AU - Dag, Ömer
AU - Dao, Thang Duy
AU - Nagao, Tadaaki
AU - Sakamoto, Yasuhiro
AU - Kimura, Tatsuo
AU - Terasaki, Osamu
AU - Yamauchi, Yusuke
N1 - Funding Information:
We acknowledge financial support from the Grant-in-Aid for Young Scientists A (Research Project Number: 26708028) of the Japan Society for the Promotion of Science (JSPS), Japanese-Taiwanese Cooperative Program of the Japan Science and Technology Agency (JST) and The Canon Foundation.
Publisher Copyright:
© 2015 Macmillan Publishers Limited. All rights reserved.
PY - 2015/3/24
Y1 - 2015/3/24
N2 - 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.
AB - 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.
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U2 - 10.1038/ncomms7608
DO - 10.1038/ncomms7608
M3 - Article
AN - SCOPUS:84925355721
VL - 6
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 6608
ER -