Issue 87, 2016

New post-processing method of preparing nanofibrous SERS substrates with a high density of silver nanoparticles

Abstract

SERS enabling substrates with increased sensitivity, their manufacturing reproducibility and enhanced structural stability are highly demanded in SERS applications. Therefore our main aim was to elaborate a simple and inexpensive method of functionalization of electrospun chitosan nanofibers by using silver nanoparticles (AgNP). For that purpose we established a protocol where we were able to control the density of AgNP on the surfaces of nanofibers, and thus electromagnetic hotspots, simply by variation of Tollens' reagent. By webbing of such fibers we were able to prepare films that were enabling SERS either of solutes or macromolecular structures such as bacterial cells. Especially, to detect bacterial cells we established two approaches of immobilisation of cells within the films, which enabled their detection with enhancement of sensitivity by a factor of 105 and an average of 25% spot-to-spot variation.

Graphical abstract: New post-processing method of preparing nanofibrous SERS substrates with a high density of silver nanoparticles

Article information

Article type
Paper
Submitted
22 Qad 2016
Accepted
29 Leq 2016
First published
30 Leq 2016

RSC Adv., 2016,6, 84505-84511

New post-processing method of preparing nanofibrous SERS substrates with a high density of silver nanoparticles

E. S. Prikhozhdenko, V. S. Atkin, B. V. Parakhonskiy, I. A. Rybkin, A. Lapanje, G. B. Sukhorukov, D. A. Gorin and A. M. Yashchenok, RSC Adv., 2016, 6, 84505 DOI: 10.1039/C6RA18636J

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