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Issue 15, 2015
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Controlled growth of polyhedral and plate-like Ag nanocrystals on a nanofiber mat as a SERS substrate

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Abstract

We report chemical deposition of silver nanocrystals (AgNCs) of different sizes and morphologies, such as polyhedra and plates, on a polyacrylonitrile (PAN) nanofiber mat. High performance surface-enhanced Raman scattering (SERS) substrates are achieved. The effect of the experimental parameters, such as the temperature, concentration and pH of [Ag(NH3)2]OH aqueous solution, on the morphology evolution and density of AgNCs is systematically investigated. The results suggest that the optimized nanofiber mat exhibits a significant SERS performance with superior stability and reproduction, and the SERS enhancement factor (EF) can reach as high as 108 for 4-mercaptobenzoic acid (4-MBA). The optimized nanofiber mat also shows high SERS activity for p-aminothiophenol (4-ATP) over the whole nanofiber mat demonstrating the feasibility for detection of both analytes. The detection limit of 4-MBA and 4-ATP is as low as 10−9 M and 10−10 M respectively, making the nanofiber mat a promising candidate for SERS detection of chemical pollutants.

Graphical abstract: Controlled growth of polyhedral and plate-like Ag nanocrystals on a nanofiber mat as a SERS substrate

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Article information


Submitted
13 Feb 2015
Accepted
13 May 2015
First published
15 May 2015

Analyst, 2015,140, 5190-5197
Article type
Paper
Author version available

Controlled growth of polyhedral and plate-like Ag nanocrystals on a nanofiber mat as a SERS substrate

P. Jia, J. Qu, B. Cao, Y. Liu, C. Luo, J. An and K. Pan, Analyst, 2015, 140, 5190
DOI: 10.1039/C5AN00305A

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