Characteristics of nanocrystalline thin films of cadmium sulphide deposited at the water-oil interface

Abstract

Thin films of nanocrystalline CdS were obtained at the water-toluene interface by reacting cadmium diethyldithiocarbamate in toluene with aq. NaS. Three parameters unique to the topical deposition scheme: the effect of column heights, stirring and the action of molecular surfactants are systematically investigated. The obtained nanocrystalline aggregates are characterized by scanning- and transmission electron microscopy, X-ray diffraction and profilometric measurements. Conditions for obtaining smooth device quality thin films have been identified during these experiments.

Room-Temperature Production of Nanocrystalline Molybdenum Disulfide (MoS2) at the Liquid−Liquid Interface

“…Our CV experiments suggest that there is no evidence of sulfide transfer into the organic phase when a potential is applied, which was expected due to the hydrophobicity of the sulfide ion. Therefore, it can be concluded that the sulfide does not partition into the organic solvent, which is at odds with conclusions drawn in previous work …”

“…Therefore, it can be concluded that the sulfide does not partition into the organic solvent, which is at odds with conclusions drawn in previous work. 25 Analysis of the DCB solution post-reaction by electrospray mass spectrometry yielded peaks at mass-to-charge ratios of m/ z 335 and m/z 319 peaks corresponding to the [M + K] + and [M + Na] + adducts of ionized disulfiram (DSF, C 10 H 20 N 2 S 4 ; Figure S17). In addition, UV−visible absorption spectroscopy was used to confirm that the absorbance maxima of DSF at the predicted end concentration matched the absorbance of the organic solvent at the end of reaction (Figure S18).…”

“…Starting with molecular precursors, a variety of nanostructured materials have been formed including graphene 24 and transition-metal chalcogenides (TMCs) such as CdS. 25 However, there has not been, to the best of our knowledge, any prior reports of a bottom-up synthesis of MoS 2 at the L/L interface. In this report, the assembly of MoS 2 at the liquid−liquid interface from the decomposition of a molybdenum coordination complex in an organic solvent was investigated.…”

“…Nanomaterials have also been prepared at the L/L interface using bottom-up syntheses. Starting with molecular precursors, a variety of nanostructured materials have been formed including graphene and transition-metal chalcogenides (TMCs) such as CdS . However, there has not been, to the best of our knowledge, any prior reports of a bottom-up synthesis of MoS 2 at the L/L interface.…”