Synthesis and spectral studies of cysteine-capped CdS nanoparticles

Size tunable synthesis of cysteine-capped CdS nanoparticles by γ-irradiation

“…Effective stabilization of nanoparticles is key to any subsequent application and several researchers have shown the utility of thiol capping of nanoparticles in this regard. Most of these works involving aqueous thiols in colloidal synthesis use basic pH 10-12 [15,17,18] where nearly complete ionization of thiols occur. As discussed in earlier sections, such a high pH is not suited for γ -radiation assisted synthesis because of the diminished yield of HS − species.…”

“…These specific ligands like thiols and phosphine oxides cap the nanoparticle surface thereby preventing agglomeration and passivating surface electronic defects. Thiol-stabilized II-VI semiconductor nanoparticles of different materials like CdS [14][15][16], CdTe [7,17,18], CdSe [19], HgTe [20] have been prepared with several different thiols giving the opportunity to vary the functional groups at the surface and thus regulating the chemical behaviour of the particles.…”

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].…”

Temperature tunability of size in CdS nanoparticles and size dependent photocatalytic degradation of nitroaromatics

“…Thiophenol capped CdS NPs were synthesized following the method of synthesis of thiol-capped CdS nanoparticles [17,25] with adoption of suitable modifications. Here, non-aqueous synthesis was attempted by replacing water with methanol as solvent.…”