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Article

Fabrication of Multifunctional SERS Platform Based on Ag NPs Self-Assembly Ag-AAO Nanoarray for Direct Determination of Pesticide Residues and Baicalein in Real Samples

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Department of Biomedical Engineering, Chengde Medical University, Chengde 067000, China
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College of Physics and Electronic Engineering, Hebei Normal University for Nationalities, Chengde 067000, China
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School of Energy and Power Engineering, North University of China, Taiyuan 030051, China
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College of Traditional Chinese Medicine, Chengde Medical University, Chengde 067000, China
5
State Key Laboratory of Materials Science & Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Angela De Bonis
Coatings 2021, 11(9), 1054; https://doi.org/10.3390/coatings11091054
Received: 3 August 2021 / Revised: 21 August 2021 / Accepted: 25 August 2021 / Published: 31 August 2021
(This article belongs to the Collection Advanced Surface Coating of Nanoparticles)
Aiming at the shortcomings of high cost and time-consumption in traditional liquid chromatography, an effective surface enhanced Raman scattering (SERS)-based trace detection method has been proposed to quantitatively identify the active component of traditional Chinese medicine. In this paper, a high-performance and versatile SERS platform based on Ag nanoparticles (NPs) self-assembly Ag-anodized aluminium (Ag NPs-Ag-AAO) nanoarray was fabricated by controllable physico-chemical preparation technology. The results indicated that the electromagnetic field enhancement effect was sharply strengthened as Ag NPs assembled, and the experimental enhancement factor (EEF) value was calculated to be 1.0083 × 106. This novel Ag NPs-Ag-AAO nanoarray with substantial “hot spots” exhibited high SERS signal reproducibility, with the relative standard deviation (RSD) value at less than 2.23%. More importantly, this SERS platform was applied to detect active component Baicalein in Scutellaria baicalensis, and the limit of detection (LOD) was located at 10 fg/mL. Therefore, this Ag NPs-Ag-AAO nanoarray with high sensitivity, strong Raman signal reproducibility and reliable practicability has broad application prospects in the rapid detection of trace substances in the active components of traditional Chinese medicine and is expected to be popularized. View Full-Text
Keywords: SERS; AAO; Ag nanopillar; Ag NPs; Baicalein; pesticide residue SERS; AAO; Ag nanopillar; Ag NPs; Baicalein; pesticide residue
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MDPI and ACS Style

Shi, G.; Li, K.; Gu, J.; Yuan, W.; Xu, S.; Han, W.; Gu, J.; Wang, L.; Zhang, Z.; Chen, C.; Ge, J.; Wang, M. Fabrication of Multifunctional SERS Platform Based on Ag NPs Self-Assembly Ag-AAO Nanoarray for Direct Determination of Pesticide Residues and Baicalein in Real Samples. Coatings 2021, 11, 1054. https://doi.org/10.3390/coatings11091054

AMA Style

Shi G, Li K, Gu J, Yuan W, Xu S, Han W, Gu J, Wang L, Zhang Z, Chen C, Ge J, Wang M. Fabrication of Multifunctional SERS Platform Based on Ag NPs Self-Assembly Ag-AAO Nanoarray for Direct Determination of Pesticide Residues and Baicalein in Real Samples. Coatings. 2021; 11(9):1054. https://doi.org/10.3390/coatings11091054

Chicago/Turabian Style

Shi, Guochao, Kuihua Li, Jungai Gu, Wenzhi Yuan, Shiqi Xu, Wei Han, Jianjun Gu, Liyong Wang, Zhibin Zhang, Congzhe Chen, Jialin Ge, and Mingli Wang. 2021. "Fabrication of Multifunctional SERS Platform Based on Ag NPs Self-Assembly Ag-AAO Nanoarray for Direct Determination of Pesticide Residues and Baicalein in Real Samples" Coatings 11, no. 9: 1054. https://doi.org/10.3390/coatings11091054

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