Journal
JOURNAL OF INNOVATIVE OPTICAL HEALTH SCIENCES
Volume 14, Issue 4, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793545821410054
Keywords
Surface-enhanced Raman scattering (SERS); self-assembly; Ag-covered hedgehog-like nanosphere arrays (Ag/HLNAs); pesticide detections
Funding
- National Natural Science Foundation of China [61771467, 61774167, 61801477]
- National Key Research and Development Program of China [2018YFC2001100]
- Youth Innovation Promotion Association, Chinese Academy of Sciences [2018153]
- Key-Area Research and Development Program of Guangdong Province [2019B010117001]
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The development of large-area self-assembly approach assisted with reactive ion etching (RIE) for preparing surface-enhanced Raman scattering (SERS) devices consisting of Ag-covered hedgehog-like nanosphere arrays (Ag/HLNAs) has shown promising results for detecting trace pesticides, with high uniformity and excellent performance.
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 2.79x107, a limit of detection (LOD) up to 10-12M 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 10-8M for thiram molecules. It indicates that the proposed SERS device has a promising opportunity in detecting toxic organic pesticides.
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