Silver nanoparticle/bacterial nanocellulose paper composites for paste-and-read SERS detection of pesticides on fruit surfaces

Attasith Parnsubsakul; Umphan Ngoensawat; Tuksadon Wutikhun; Thanyada Sukmanee; Chaweewan Sapcharoenkun; Prompong Pienpinijtham; Sanong Ekgasit

doi:10.1016/j.carbpol.2020.115956

Silver nanoparticle/bacterial nanocellulose paper composites for paste-and-read SERS detection of pesticides on fruit surfaces

Carbohydr Polym. 2020 May 1:235:115956. doi: 10.1016/j.carbpol.2020.115956. Epub 2020 Feb 4.

Authors

Attasith Parnsubsakul¹, Umphan Ngoensawat¹, Tuksadon Wutikhun², Thanyada Sukmanee¹, Chaweewan Sapcharoenkun², Prompong Pienpinijtham¹, Sanong Ekgasit³

Affiliations

¹ Sensor Research Unit (SRU), Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Road, Pathum Wan, Bangkok, 10330, Thailand; Research Network NANOTEC-CU on Advanced Structural and Functional Nanomaterials, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
² National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani, 12120, Thailand.
³ Sensor Research Unit (SRU), Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phaya Thai Road, Pathum Wan, Bangkok, 10330, Thailand; Research Network NANOTEC-CU on Advanced Structural and Functional Nanomaterials, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand. Electronic address: sanong.e@chula.ac.th.

PMID: 32122492
DOI: 10.1016/j.carbpol.2020.115956

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.

Keywords: Bacterial nanocellulose; Flexible substrate; In situ detection; Methomyl; Silver nanoparticles; Surface enhanced Raman scattering.

MeSH terms

Acetobacter / chemistry*
Cellulose / chemistry*
Food Contamination / analysis*
Fruit / chemistry*
Metal Nanoparticles / chemistry
Nanocomposites / chemistry*
Paper*
Particle Size
Pesticides / analysis*
Silver / chemistry
Spectrum Analysis, Raman
Surface Properties

Substances

Pesticides
Silver
Cellulose