Cadmium Sulphide (CdS) Nanotechnology: Synthesis and Applications

Abstract

Over the past few years there has been sustained interest in the synthesis, characterization and application of cadmium sulphide (CdS) nanostructures such as nanoparticles, nanowires, nanobelts, nanospheres. The history of CdS, more recent advances in the chemistry and synthesis of CdS nanostructures, and their application as nanoscale devices in diverse technology areas from electronics to targeted drug delivery is described. Although the focus is on CdS, the review provides an excellent overview of the materials, methods, processes and promising solutions that are emerging.

Stable phase CdS nanoparticles for optoelectronics: a study on surface morphology, structural and optical characterization

“…This type of behavior is commonly observed in nanosized particles [14]. The comparison of XRD peak profile and the 2θ position of diffraction peaks (Table 1) with standard ASTM data confirms the wurtzite (α-CdS) crystal structure with the preferential orientation along (0 0 2) plane [10]. An additional peak at 2θ = 31.33°has also been detected which corresponds to hcp CdO [27].…”

“…This may point out that the synthesized CdS nanoparticles are rich in Cd content. The intensity of diffraction peaks (Table 1) has been observed to be low as compared to bulk CdS [10]. It is also observed that the positions of diffraction peaks for CdS nanoparticles shift to higher diffraction angles in comparison to bulk CdS.…”

“…where ( The lattice constants for the synthesized CdS nanoparticles were found to be less than standard values [10]. Thus it can be concluded that the lattice is contracted which may be due to the presence of defects like surface or interface stress, strain and dislocations, etc., associated with reduced size of nanoparticles [29].…”

“…CdS is a promising binary II -VI semiconductor used in variety of optoelectronic applications, including solar cell windows, laser communication, photoconductors, field effect transistors, sensors, photocatalysts, biological indicators, light emitting diodes, etc. [9][10][11][12]. It is a wide band gap semiconductor lightly soluble in water and highly soluble in acid.…”

Studies on the dielectric properties of CdS nanoparticles

“…Because the novel properties of nanomaterials depend on their size, structure and shape, an understanding of their mechanism as well as a new direction for synthetic methods are significant issues in nanoscience and nanotechnology (White et al 2009). As a result of the high surface-to-volume ratio of the nanoparticles, the surface properties have significant effects on their structure, and in turn, have an influence on the nanoscale devices in electronics to target in drug delivery (Hullavarad et al 2008). In recent years, semiconductor nanoparticles exhibit specific properties due to the quantum confinement effects.…”