Synthesis and optimization of CdTe quantum dots with the help of erythorbic acid and ethanol

Abstract

The effects of erythorbic acid (EA) and ethanol on the aqueous formation of cadmium telluride (CdTe) quantum dots (QDs) were explored in this work.

DNA-Templated Single Thermal Cycle Based Synthesis of Highly Luminescent Au Nanoclusters for Probing Gene Expression

“…Absence of MPA did not lead to formation of luminescent Au nanoclusters, which suggested its role in reduction of AuCl 4 – to produce Au nanoclusters and effectively passivating them through −S–Au bond linkages. Small sized thiol (−SH) containing molecules like MPA, which have been known to withstand sufficiently high temperatures, provide options to control growth kinetics, passivate surface dangling bonds, be responsible for surface functionality, optical and colloidal stability, helped in the current synthesis to obtain defect free nanoclusters. − Further, dsDNA (along with MPA) acted as a stabilizer and provided steric protection to Au nanoclusters. The strong affinity of DNA with transition metals, particularly gold, possibly played an important role toward binding of Au ions and controlled growth of ultrasmall Au nanoclusters.…”

Facile synthesis of CdTe-based quantum dots promoted by mercaptosuccinic acid and hydrazine

“…After 30 minutes, the solution was cooled down slowly to room temperature. This process is more facile and efficient than that in our previous work, 30 which also employed some assistant reagents to improve the quality of CdTe QDs. The PL QYs of CdTe QD samples were calculated using rhodamine 6G (with ethanol as solvent) as a reference (QY considered as 95%, excited at 488 nm).…”

Сolloidal synthesis and characterization of hydrophilic CdTe quantum dots for medical diagnostics

“…water. In ACS, heavy metals precursors (for example, CdCl 2 , Cd(NO 3 ) 2 and Cd(CH 3 COO) 2 ) readily dissolve in water and are coordinated by hydrophilic agents such as TGA [16,17], mercaptopropionic acid (MPA) [18], L-cys, [19], glutathione (GSH) [20], MEA [21], mercaptosuccinic acid (MSA) [22]. Chalcogen precursors can be NaHE (E = Se, Te) which are freshly prepared in an aqueous medium and obtained by chemical reduction of selenium (Se) or tellurium (Te) in the presence of boron sodium hydride (NaBH 4 ).…”