Title :
Synthesis of Color-Tunable CdSe Nanocrystals via a Green Synthetic Method
Author :
Rongfang Wang ; Xianmei Xu ; Yilin Wang ; Liya Zhou ; Bin Li
Author_Institution :
Sch. of Chem. & Chem. Eng., Guangxi Univ., Nanning, China
Abstract :
In this letter, ascorbic acid was used as a novel and environmental friendly reducing agent in the synthesis of high-quality L-cysteine-capped CdSe nanocrystals. The X-ray diffraction and high-resolution transmission electron microscope results show that the as-prepared CdSe quantum dots (QDs) had a cubic crystal structure with an average size of 5 nm. The synthetic conditions were optimized by adjusting the n(L-Cys)/n(Cd2+), pH, and Cd/Se molar ratios. Under optimum conditions, the quantum yield of CdSe QDs reached 22%.
Keywords :
II-VI semiconductors; X-ray diffraction; cadmium compounds; crystal structure; nanofabrication; nanostructured materials; semiconductor growth; semiconductor quantum dots; transmission electron microscopy; wide band gap semiconductors; CdSe; X-ray diffraction; ascorbic acid; color-tunable CdSe nanocrystals; cubic crystal structure; green synthetic method; high-quality L-cysteine-capped CdSe nanocrystals; high-resolution transmission electron microscope; quantum dots; quantum yield; reducing agent; size 5 nm; Crystals; Fluorescence; Nanocrystals; Quantum dots; Temperature measurement; X-ray diffraction; X-ray scattering; Luminescence; X-ray diffraction; quantum dots;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2318723
