Preparation and purification of l-cysteine capped CdTe quantum dots and its self-recovery of degenerate fluorescence

Synthesis of CdSe quantum dots using selenium dioxide as selenium source and its interaction with pepsin

“…Namely, the stretching vibration of the thiol group (2550 cm −1 ) was absent. As reported [26], due to the formation of covalent bonds between thiols and the Cd 2+ ions of the surface of QDs, the peaks of -SH group on the surface of QDs disappeared. It disclosed that TGA-capped CdSe QDs were formed.…”

Determination of Paracetamol Based on its Quenching Effect on the Photoluminescence of CdTe Fluorescence Probes

“…On comparison of the two spectra, the most significant point to be noted is that the band at 2,552 cm −1 , corresponding to -SH stretching mode [26], is absent in the spectrum of L-cysteine capped CdTe NPs. It can be attributed to the cleavage of S-H bonds and formation of Cd-S bonds, which further reveals that the Lcysteine has already been bound to the surface of Cd 2+ site [26,27].…”

Enhanced electrogenerated chemiluminescence of tris(2,2′-bipyridyl)ruthenium(II) system by l-cysteine-capped CdTe quantum dots and its application for the determination of nitrofuran antibiotics

“…These ligands are compact, charged, and maintain colloidal stability via electrostatic repulsion. The L-cysteine-capped CdTe-QDs have been found to have a strong effect on the fluorescent properties in addition to acting a stabilizer (Li et al 2010). In some cases, the formation and annihilation rates of CdTe-QDs significantly influence the CL emission .…”

“…However, in Figures 2(c) and 2(g) the ECL response shows that the ECL intensity of Ru(bpy) 3 2+ in 0.1 M PBS is enhanced with a 26-fold increase using cysteine-capped CdTe-QDs. The strong increase in ECL response resulted from the excited QDs Li et al (2010). explained that the capped ligand and the size of CdTe-QDs have a profound effect on the CL intensity of the QD system.…”