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Sensors 2011, 11(11), 10372-10387; doi:10.3390/s111110372

Fabrication and Characterization of Electrospun Semiconductor Nanoparticle—Polyelectrolyte Ultra-Fine Fiber Composites for Sensing Applications

 and *
Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
* Author to whom correspondence should be addressed.
Received: 27 September 2011 / Revised: 21 October 2011 / Accepted: 24 October 2011 / Published: 31 October 2011
(This article belongs to the Special Issue Sensing with Quantum Dots)
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Fluorescent composite fibrous assembles of nanoparticle-polyelectrolyte fibers are useful multifunctional materials, utilized in filtration, sensing and tissue engineering applications, with the added benefits of improved mechanical, electrical or structural characteristics over the individual components. Composite fibrous mats were prepared by electrospinning aqueous solutions of 6 wt% poly(acrylic acid) (PAA) loaded with 0.15 and 0.20% v/v, carboxyl functionalized CdSe/ZnS nanoparticles (SNPs). The resulting fluorescent composite fibrous mats exhibits recoverable quenching when exposed to high humidity. The sensor response is sensitive to water concentration and is attributed to the change in the local charges around the SNPs due to deprotonation of the carboxylic acids on the SNPs and the surrounding polymer matrix.
Keywords: composite-nanofibers; polyelectrolytes; electrospinning; nano-effects composite-nanofibers; polyelectrolytes; electrospinning; nano-effects
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Atchison, J.S.; Schauer, C.L. Fabrication and Characterization of Electrospun Semiconductor Nanoparticle—Polyelectrolyte Ultra-Fine Fiber Composites for Sensing Applications. Sensors 2011, 11, 10372-10387.

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