Multi-hot spot configuration on urchin-like Ag nanoparticle/ZnO hollow nanosphere arrays for highly sensitive SERS

被引：68

作者：

He, Xu ^{[1
]}

Yue, Chuang ^{[1
]}

Zang, Yashu ^{[1
]}

Yin, Jun ^{[1
,2
]}

Sun, Shibo ^{[1
]}

Li, Jing ^{[1
]}

Kang, Junyong ^{[1
]}

机构：

[1] Xiamen Univ, Dept Phys, Pen Tung Sah Inst Micronano Sci & Technol, Xiamen 361005, Peoples R China

[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2013年 / 1卷 / 47期

基金：

中国国家自然科学基金;

关键词：

ENHANCED RAMAN-SCATTERING; SURFACE-PLASMON RESONANCE; ZNO NANORODS; SILVER; FABRICATION;

D O I：

10.1039/c3ta13450d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Urchin-like Ag nanoparticle (NP)/ZnO hollow nanosphere (HNS) arrays were fabricated employing a simple, low cost and wafer scale method consisting of nanosphere lithography (NSL) and solution processes. This three-dimensional (3D) multi-hot spot decorated nanocomposite presents an as high as 108 Raman enhancement using Rhodamine 6G (R6G) as the probe with the concentration down to 10(-10) M. The high density hot spots in a unit area and strong field intensity around each individual hot spot in 3D layout are believed to be the major reasons for this high sensitivity Raman phenomenon, which is further proved by the theoretical simulation results. Given its high Raman sensitivity and good reproducibility in a large area, this urchin-like Ag NP/ZnO HNS hybrid nanoarray can be reasonably proposed to be used as a SERS substrate in practical applications, including bio-sensing, materials characterization, environmental science and so on.

引用

页码：15010 / 15015

页数：6