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Nanomaterials 2016, 6(6), 102; doi:10.3390/nano6060102

Fluorescent Nanocomposite of Embedded Ceria Nanoparticles in Crosslinked PVA Electrospun Nanofibers

1
Department of Engineering Mathematics and Physics, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
2
Center of Smart Nanotechnology and Photonics (CSNP), SmartCI Research Center, Alexandria University, Alexandria 21544, Egypt
3
The Utah Science Technology and Research Agency (USTAR) Bioinnovations center, Utah State University, Logan, UT 84341, USA
4
Department of Chemical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
5
Department of Electrical Engineering, Faculty of Engineering, Alexandria University, Alexandria 21544, Egypt
*
Author to whom correspondence should be addressed.
Academic Editor: Mikael S. Hedenqvist
Received: 5 April 2016 / Revised: 9 May 2016 / Accepted: 24 May 2016 / Published: 1 June 2016
(This article belongs to the Special Issue Multifunctional Polymer-Based Nanocomposites)
View Full-Text   |   Download PDF [4013 KB, uploaded 1 June 2016]   |  

Abstract

This paper introduces a new fluorescent nanocomposite of electrospun biodegradable nanofibers embedded with optical nanoparticles. In detail, this work introduces the fluorescence properties of PVA nanofibers generated by the electrospinning technique with embedded cerium oxide (ceria) nanoparticles. Under near-ultra violet excitation, the synthesized nanocomposite generates a visible fluorescent emission at 520 nm, varying its intensity peak according to the concentration of in situ embedded ceria nanoparticles. This is due to the fact that the embedded ceria nanoparticles have optical tri-valiant cerium ions, associated with formed oxygen vacancies, with a direct allowed bandgap around 3.5 eV. In addition, the impact of chemical crosslinking of the PVA on the fluorescence emission is studied in both cases of adding ceria nanoparticles in situ or of a post-synthesis addition via a spin-coating mechanism. Other optical and structural characteristics such as absorbance dispersion, direct bandgap, FTIR spectroscopy, and SEM analysis are presented. The synthesized optical nanocomposite could be helpful in different applications such as environmental monitoring and bioimaging. View Full-Text
Keywords: ceria nanoparticles; electrospinning; nanofibers; crosslinking; fluorescence ceria nanoparticles; electrospinning; nanofibers; crosslinking; fluorescence
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Shehata, N.; Gaballah, S.; Samir, E.; Hamed, A.; Saad, M. Fluorescent Nanocomposite of Embedded Ceria Nanoparticles in Crosslinked PVA Electrospun Nanofibers. Nanomaterials 2016, 6, 102.

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