期刊
APPLIED SURFACE SCIENCE
卷 478, 期 -, 页码 793-801出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.01.187
关键词
Metal film over nanosphere; Nanoporous gold; Hot spots; Surface area; Surface-enhanced Raman scattering (SERS)
类别
资金
- National Natural Science Foundation of China [51401194]
Metal film over nanosphere (MFON) prepared by nanosphere lithography (NSL) is a widely used surface-enhanced Raman scattering (SERS) substrate for practical applications because of its large, facile, and reproducible SERS properties. The SERS hot spot of MFON mainly originates from the sharp crevices between adjacent metallic half-domes. However, these sharp crevices are rare for MFON, which limits the further improvement of Raman signals. Here, we report a simple strategy, which combines NSL with dealloying, to create a nanoporous gold film over nanosphere (NPGFON) with 3D distributed hot spots. It was demonstrated that NPGFON can generate more than 35 times higher Raman enhancement than conventional gold film over nanosphere (AuFON) structure. The large SERS enhancement of NPGFON mainly originates from two aspects. One is the large surface area introduced by the internal nanoporous structures. The other is the abundant hot spots that locate both near the sharp crevices between adjacent half-domes and in the widely distributed nanopores. The SERS performances of NPGFON can be adjusted by its pore size, gap size, and period.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据