SERS devices with “hedgehog-like” nanosphere arrays for detection of trace pesticides

• Published in: Journal of innovative optical health science Vol. 14; no. 4; pp. 2141005-1 - 2141005-10
• Main Authors: Liu, Yang, Li, Xin, Cheng, Jie, Zhou, Na, Zhang, Lingqian, Mao, Haiyang, Huang, Chengjun
• Format: Journal Article
• Language: English
• Published: Singapore World Scientific Publishing Company 01.07.2021; World Scientific Publishing Co. Pte., Ltd; World Scientific Publishing
• Subjects: ag-covered “hedgehog-like” nanosphere arrays (ag/hlnas); Arrays; Etching; Nanospheres; Organic pesticides; pesticide detections; Pesticide toxicity; Pesticides; Raman spectra; Reactive ion etching; Research Article; Rhodamine 6G; Self-assembly; surface-enhanced raman scattering (sers); Thiram; self-assembly; Surface-enhanced Raman scattering (SERS); Ag-covered “hedgehog-like” nanosphere arrays (Ag/HLNAs); pesticide detections
• ISSN: 1793-5458; 1793-7205
• DOI: 10.1142/S1793545821410054

The development of surface-enhanced Raman scattering (SERS) devices for detection of trace pesticides has attracted more and more attention. In this work, a large-area self-assembly approach assisted with reactive ion etching (RIE) is proposed for preparing SERS devices consisting of Ag-covered “hedgehog-like” nanosphere arrays (Ag/HLNAs). Such a SERS device has an enhancement factor of 2 . 7 9 × 1 0 7 , a limit of detection (LOD) up to 10 − 1 2 M for Rhodamine 6G (R6G) analytes, and a relative standard deviation (RSD) smaller than 10%, demonstrating high uniformity. Besides, for pesticide detections, the device achieves an LOD of 10 − 8 M for thiram molecules. It indicates that the proposed SERS device has a promising opportunity in detecting toxic organic pesticides.