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Preparation of Quasi-Three-Dimensional Porous Ag and Ag-NiO Nanofibrous Mats for SERS Application

1
Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing 400044, China
2
Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
3
Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, USA
4
Liquor Making Biology Technology and Application of Key Laboratory of Sichuan Province, College of Bioengineering, Sichuan University of Science and Engineering, Zigong 643000, China
5
Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
*
Authors to whom correspondence should be addressed.
Sensors 2018, 18(9), 2862; https://doi.org/10.3390/s18092862
Received: 2 August 2018 / Revised: 22 August 2018 / Accepted: 26 August 2018 / Published: 30 August 2018
(This article belongs to the Special Issue Applications of Raman Spectroscopy in Sensors)
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Abstract

In this study, two new quasi-three-dimensional Surface Enhanced Raman Scattering (SERS) substrates, namely porous Ag and Ag-NiO nanofibrous mats, were prepared using a simple, electrospinning-calcination, two-step synthetic process. AgNO3/polyvinyl pyrrolidone (PVP) and AgNO3/Ni(NO3)2/PVP composites serving as precursors were electrospun to form corresponding precursory nanofibers. Porous Ag and Ag-NiO nanofibers were successfully obtained after a 3-h calcination at 500 °C under air atmosphere, and analyzed using various material characterization techniques. Synthesized, quasi-three-dimensional porous Ag and Ag-NiO nanofibrous mats were applied as SERS substrates, to measure the model compound Rhodamine 6G (R6G), and investigate the corresponding signal enhancement. Furthermore, porous Ag and Ag-NiO nanofibrous mats were employed as SERS substrates for melamine and methyl parathion respectively. Sensitive detection of melamine and methyl parathion was achieved, indicating their feasibility as an active SERS sensing platform, and potential for food safety and environmental monitoring. All the results suggest that the electrospinning-calcination, two-step method offers a new, low cost, high performance solution in the preparation of SERS substrates. View Full-Text
Keywords: electrospinning; silver; nanofiber; surface enhanced Raman scattering; melamine; methyl parathion electrospinning; silver; nanofiber; surface enhanced Raman scattering; melamine; methyl parathion
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Wu, H.; Sun, X.; Hou, C.; Hou, J.; Lei, Y. Preparation of Quasi-Three-Dimensional Porous Ag and Ag-NiO Nanofibrous Mats for SERS Application. Sensors 2018, 18, 2862.

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