Arrays of ZnO nanorods decorated with Au nanoparticles as surface-enhanced Raman scattering substrates for rapid detection of trace melamine

作者：Yi, Zao; Yi, Yong; Luo, Jiangshan; Li, Xibo; Xu, Xibin; Jiang, Xiaodong; Yi, Yougen; Tang, Yongjian

来源：Physica B: Condensed Matter , 2014, 451: 58-62.

DOI：10.1016/j.physb.2014.06.026

• ZnO nanorods-Au nanoparticles
• Surface-enhanced Raman scattering
• Melamine

In this paper, as a new, highly sensitive and uniform hybrid surface-enhanced Raman scattering (SERS) substrate, arrays of ZnO nanorods (ZnO-NRs) decorated with Au nanoparticles (Au-NPs) have been prepared. This hybrid substrate manifests high SERS sensitivity to melamine and a detection limit as low as 1.0 x 10(-10) M (1.26 mu g L-1). A maximum enhancement factor of 1.0 x 10(9) can be obtained with the ZnO NF-Au (sample 2) film. Au-NPs gaps in the array can create lots of SERS "hot spots" that mainly contribute to the high SERS sensitivity. Moreover, the supporting chemical enhancement effect of ZnO-NRs and the better enrichment effect ascribed to the large surface area of the substrate also help to achieve a lower detection limit. The promising advantages of easy sample pretreatment, short detection time and low cost makes the arrays of ZnO-NRs decorated with Au-NPs substrate a potential detection tool in the field of food safety.

• 出版日期2014-10-15
• 单位中国工程物理研究院; 中国工程物理研究院激光聚变研究中心; 西南科技大学