1. Silver nanoparticle/bacterial nanocellulose paper composites for paste-and-read SERS detection of pesticides on fruit surfaces.
- Author
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Parnsubsakul A, Ngoensawat U, Wutikhun T, Sukmanee T, Sapcharoenkun C, Pienpinijtham P, and Ekgasit S
- Subjects
- Metal Nanoparticles chemistry, Particle Size, Silver chemistry, Spectrum Analysis, Raman, Surface Properties, Acetobacter chemistry, Cellulose chemistry, Food Contamination analysis, Fruit chemistry, Nanocomposites chemistry, Paper, Pesticides analysis
- Abstract
This study aimed to develop an eco-friendly flexible surface-enhanced Raman scattering (SERS) substrate for in-situ detection of pesticides using biodegradable bacterial nanocellulose (BNC). Plasmonic silver nanoparticle- bacterial nanocellulose paper (AgNP-BNCP) composites were prepared by vacuum-assisted filtration. After loading AgNPs into BNC hydrogel, AgNPs were trapped firmly in the network of nanofibrous BNCP upon ambient drying process, resulting in 3D SERS hotspots within a few-micron depth on the substrate. The fabricated AgNP-BNCPs exhibited high SERS activity with good reproducibility and stability as demonstrated by the detection of 4-aminothiophenol and methomyl pesticide. Due to the optical transparency of BNCP, a direct and rapid detection of methomyl on fruit peels using AgNP-BNCPs can be achieved, demonstrating a simple and effective 'paste-and-read' SERS approach. These results demonstrate potential of AgNP-BNCP composites for user-friendly in-situ SERS analysis., (Copyright © 2020 Elsevier Ltd. All rights reserved.)
- Published
- 2020
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