Surface ligand modified silver nanoparticles-based SERS sensing platform for ultrasensitive detection of the pesticide thiram in green tea leaves: roles of coating agents in sensing performance.

Autor:	Linh DT; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn.; Faculty of Fundamental Sciences, Thai Nguyen University of Technology 666 3/2 Road Thai Nguyen City 24000 Vietnam., Mai QD; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn., Nguyet Nga DT; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn., Anh NT; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn., Van Tuan H; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn., Nguyen HA; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn., Vu XH; Institute of Science and Technology, TNU-University of Sciences Tan Thinh Ward Thai Nguyen City 24000 Vietnam., Le AT; Phenikaa University Nano Institute (PHENA), Phenikaa University Hanoi 12116 Vietnam doan.maiquan@phenikaa-uni.edu.vn anh.nguyenha@phenikaa-uni.edu.vn tuan.leanh@phenikaa-uni.edu.vn.; Faculty of Materials Science and Engineering (MSE), Phenikaa University Hanoi 12116 Vietnam.
Jazyk:	angličtina
Zdroj:	RSC advances [RSC Adv] 2024 Mar 25; Vol. 14 (14), pp. 9975-9984. Date of Electronic Publication: 2024 Mar 25 (Print Publication: 2024).
DOI:	10.1039/d4ra00048j
Abstrakt:	Silver nanoparticles (AgNPs) have been regarded as a highly promising substrate for surface-enhanced Raman scattering (SERS) sensors. In this study, we focused on the electrochemical synthesis method by developing three kinds of AgNPs using three different electrolytes: citrate (e-Ag-C), oleic acid (e-Ag-O) and fish mint ( Houttuynia cordata Thunb.) extract (e-Ag-bio). The as-prepared AgNPs were characterized and then employed as SERS substrates to detect the pesticide thiram. The obtained results show that e-Ag-O exhibits the best SERS performance. The effect of the coating agent was explained by chemical and electromagnetic enhancements (CM and EM). Although thiram could absorb onto e-Ag-C at the highest level, allowing its Raman signal to be best enhanced via the CM, the smallest interparticle distance of e-Ag-O could have resulted in the largest improvement in the EM. Using e-Ag-O to develop SERS-based sensors for thiram, we obtain the impressive detection limit of 1.04 × 10 -10 M in standard samples and 10 -9 M in tea leaves. The linear ranges are from 10 -4 M to 10 -7 M and from 10 -7 M to 10 -9 M, covering the maximum residue levels for plant commodities established by the United States Environment Protection Agency and European Food Safety Authority (2-13 ppm ∼7.7 × 10 -6 M to 5 × 10 -5 M). Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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