3D SERS Substrate of Z-Shaped Ag Nanorod Array for Thiabendazole Detection

Yongjun Zhang; Xiaoyu Zhao; Deyuan Mao; Jiahong Wen; Renxian Gao; Yaxin Wang

doi:10.3390/molecules28207078

3D SERS Substrate of Z-Shaped Ag Nanorod Array for Thiabendazole Detection

Molecules. 2023 Oct 13;28(20):7078. doi: 10.3390/molecules28207078.

Authors

Yongjun Zhang^{1

2}, Xiaoyu Zhao¹, Deyuan Mao¹, Jiahong Wen^{2

3}, Renxian Gao⁴, Yaxin Wang¹

Affiliations

¹ School of Material and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
² Shangyu Institute of Science and Engineering, Hangzhou Dianzi University, Shaoxing 312000, China.
³ The College of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, China.
⁴ Department of Physics, Xiamen University, Xiamen 361005, China.

Abstract

Ag nanoparticles sputtered on silicon wafer are used as masks for the fabrication of silicon columns by ion etching, which induces the growth of the inclined Ag nanorod by inclined Ag sputtering. V-shaped and Z-shaped Ag nanorods can be obtained by varying incline angles and deposition times. SERS detection and FDTD simulation are used to compare and investigate the enhanced electromagnetic coupling of incline nanorod arrays with different shapes in three-dimensional space, which indicates that Z-shaped nanorods show good SERS properties. The Z-shaped Ag nanorod array is used as a SERS substrate for the detection of thiabendazole with a concentration down to 10^-11 M.

Keywords: 3D hotspot distribution; Z-shaped Ag nanorods; thiabendazole detection.

Grants and funding

This research was funded by the National Natural Science Foundation of China (Nos. 51901060, 12004090); the National Natural Science Foundation of Zhejiang Province (Nos. LY21E010004, LQ21A040009); the Fundamental Research Funds for the Provincial Universities of Zhejiang (Nos. GK239909299001-007, GK209907299001–025); and the Key Research Project of Zhejiang Lab (Nos. 2022MH0AC01, 2022MG0AB02).