SYNTHESIS, STRUCTURAL AND OPTICAL STUDIES OF PdS NANOCRYSTALS AND PdS/STARCH NANOCOMPOSITES FROM DITHIOCARBAMATE SINGLE SOURCE PRECURSORS

[摘要] We report the synthesis of PdS nanocrystals and PdS/potato starch nanocomposites using dithiocarbamate single source precursor’s thermolysed in hexadecylamine. The optical studies of the nanoparticles showed that the absorption spectra of the PdS nanoparticles are blue shifted compared to their corresponding bulk materials while the photoluminescence spectra show narrow emissions that are red-shifted. The XRD patterns confirmed the formation of cubic phase for PdS nanoparticles. TEM images of PdS showed monodisperse nanocrystals with average crystallite sizes of 6.94-9.62 nm for PdS1, 4.94-6.52 for PdS2, and 7-10.43 for PdS3. The SEM images showed uniform surface morphology of PdS nanoparticles with almost spherically shaped nanoparticles, while EDS confirms the presence of Pd and S for HDA-capped PdS nanoparticles. SEM images and EDS of the PdS/potato starch nanocomposites confirmed the dispersion of the nanoparticles in starch matrices and their FTIR further confirms interactions between the PdS nanocrystals and the starch matrices in the nanocomposites.

[学科分类] 生物技术

[关键词] Dithiocarbamate;PdS;Nanoparticles;Starch;Nanocomposites;Morphology