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

Sensors

Jennifer S. Atchison¹ 

[1] id="af1-sensors-11-10372">Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, U

关键词: composite-nanofibers;    polyelectrolytes;    electrospinning;    nano-effects;   

DOI  :  10.3390/s111110372

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.