Electrospun Nanofibers prepared with CdTe QDs, CdTeSe QDs and CdTe/CdS Core-shell QDs

Abstract

In this study, a novel method is used to prepare water-soluble CdTe, CdTeSe quantum dots (QDS) and CdTe/CdS core-shell QDs by using Te, Se, NaBH 4 , and CdCl 2 as precursors. Electrospinning method is used to obtain polyvinyl alcohol (PVA)/QDs composite nanofibers. A series of PVA/QDs nanofiber mats with three different QDs content are prepared. Transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) have been used to characterize QD nanoparticles. In addition, for characterization of the composite nanofibers, scanning electron microscopy (SEM) and atomic force microscopy (AFM) have been used. QDs have a good dispersed crystalline structure with an average crystalline size between 2-4 nm. Morphology analyses reveal that the composite nanofibers with an average diameter ranging from 50 to 250 nm are prepared using the electrospinning technique.