Synthesis and Optical Properties of Water-Soluble CdTe:Zn2+ Quantum Dots Prepared by the One-Pot Approach

Journal of the Brazilian Chemical Society

Vivas, Marcelo G.¹  Sousa, José C. L.² 

[1] Universidade Federal de Alfenas, Poços de Caldas, Brazil;Universidade Federal de São João Del-Rei, São João Del-Rei, Brazil

关键词: CdTeZn2+;    quantum dots;    nanocrystals;    alloys.;   

DOI  :  10.21577/0103-5053.20180128

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

This paper reports the synthesis and characterization of ternary CdTe:Zn2+ quantum dots (QDs) passivated with reduced L-glutathione (GSH) dispersed in water. The synthesis was performed through a one-pot approach and their size-dependent optical properties were investigated through steady-state absorption and emission spectroscopies along with the evolving factor analysis/multivariate curve resolution alternating least squares (EFA/MCR-ALS) method. Our results show that the incorporation of Zn2+ ions in CdTe:Zn2+ QDs, during the synthesis time, decreases the CdTe:Zn2+ QDs predominant diameter in the ensemble and increases their size dispersion. In addition, fluorescence quantum yield measurements suggest a reduction in the number of surface defects in CdTe:Zn2+ QDs as compared with CdTe QDs, when both are produced from the same synthesis route.

【 授权许可】

CC BY