Li Cuiling, Dag Ömer, Dao Thang Duy, Nagao Tadaaki, Sakamoto Yasuhiro, Kimura Tatsuo, Terasaki Osamu, Yamauchi Yusuke
World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
Department of Chemistry, Bilkent University, 06800 Ankara, Turkey.
Nat Commun. 2015 Mar 23;6:6608. doi: 10.1038/ncomms7608.
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.
具有可调孔隙的介孔金（Au）薄膜有望展现出由介孔空间激发的迷人光学特性，但由于难以控制金晶体生长，这些特性尚未实现。在此，我们报告了一种可靠的软模板法，利用双嵌段共聚物的稳定胶束制备介孔金薄膜，其中电化学沉积有利于精确控制金晶体生长。在均匀介孔的中心以及孔之间的壁上都发生了强烈的场增强，导致光散射增强以及表面增强拉曼散射（SERS），例如，从应用于纳米粒子集合体反向系统的巴比涅原理可以理解这一点。
