Journal
MICROCHIMICA ACTA
Volume 187, Issue 10, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-020-04514-1
Keywords
Electrospun fibers; Silver nanoplates; Tollens reaction; SERS sensing; Pesticide residues
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Funding
- National Natural Science Foundation of China [21703102]
- Natural Science Foundation of Jiangsu Province, China [BK20170976, BK20160982]
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Silver nanoplates were for the first time synthesized on electrospun chitosan/polyethylene oxide (CS/PEO) fibers via tollens reaction. Ag nanoplates/CS/PEO fibers were used as the SERS-active substrates for quantitative evaluation of 2-naphthylthiol, with an enhancement factor (1.41 +/- 0.07) x 10(6). The SERS-active substrates are flexible, stable, and easy for transportion and preservation, and act as the SERS platform for sensitive detection of the target. Thiram and thiabendazole as the representatives of pesticide residues were identified and detected by the Ag nanoplates/CS/PEO fibers, exhibiting linear response ranges from 10(-11)to 10(-7) M with a detection limit of 10(-11) M. The Ag nanoplates/CS/PEO fibers meet the requirement of thiram detection in practical samples, such as apple, pear, tomato, and cucumber juices. The strategy revealed the feasibility of fabrication of Ag nanoplates on electrospun fibers via tollens reaction and SERS sensing of pesticides in real samples.
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