Electrospun nanofibers with CdTe QDs, CdTeSe QDs and CdTe/CdS core-shell QDs

Abstract

Summary form only given. 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. It is aimed to prepare polyvinyl alcohol (PVA)/QDs composite nanofibers by electrospinning process. A series of PVA/QDs nanofiber mats with three different QDs content are prepared. X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) are used to characterize QD nanoparticles. In addition, scanning electron microscopy (SEM) and atomic force microscopy (AFM) are used to characterize the obtained nanofibers. QDs have a good dispersed crystalline structure with an average crystalline sizes between 2-4 nm. According to the morphology analysis, homogeneous and highly porous PVA/QDs mats containing 50-300 nm diameter nanofibers are obtained by the electrospinning process.