Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Abstract

CdS nanopowder capped with sodium bis(2-ethylhexyl)sulfosuccinate was synthesized by using water-in-oil microemulsions. The CdS nanoparticles of about 5 nm obtained were embedded in polymethylmethacrylate matrix by a photocuring process. The transparent yellow solid compound was characterized by optical absorption and emission spectroscopy, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The properties of this compound were compared with those of the nanopowder dispersed in heptane and in methylmethacrylate. The results obtained indicate that the nanoparticles are homogeneously dispersed in the matrix and do not change in size during the embedding process. Even if the surface slightly changes its luminescence properties, as a consequence of the different new chemical environment, the final product seems to be suitable for practical applications.

Technique of synthesis and optical properties of CdS/polymethylmethacrylate nanocomposites

“…2) caused by recombination of excitons trapped by surface defects [6]. It is well known that the wavelength of the photoluminescence maximum for monodisperse soles is independent of the excitation source wavelength [9].…”

“…At the present time, most researches in the field of synthesis of polymeric nanocomposites are focused on the synthesis of nanoparticles in the stabilizing polymer -solvent systems followed by either their subsequent preparation as films from solutions or, for synthesis of block samples, nanoparticle incorporation into the medium thereby increasing the number of synthesis stages [6]. Application of monomers as solvents capable of further polymerization would allow block nanocomposites to be synthesized from solutions containing nanoparticles thereby excluding the expensive and ecologically hazardous procedure of solvent substitution.…”

A general method to synthesis of amphiphilic colloidal nanoparticles of CdS and noble metals

“…Functionalized colloidal nanoparticles such as CdS and noble metals have stimulated much interest during the past decade due to their potential applications in biomedical, electronic, catalysis, and optical materials [1][2][3][4][5][6][7]. A number of strategies have also been proposed to synthesize colloidal nanoparticles.…”

Vesicles as reactors of nanoparticles: an anomalous small-angle X-ray scattering study of the domains rich in copper ions

“…A number of methods are known to produce nanoparticles which require different reaction mediums (Dé ká ny et al, 1995;Caponetti et al, 2003;Pedone et al, 2005;Shi et al, 2004). Among them the ordered organic matrixes must be mentioned: Langmuir-Blodget films, microemulsions and unilamellar vesicles (Fendler, 1984(Fendler, , 1987Mann et al, 1986;Zhu et al, 1992;Pileni et al, 1992;Korgel & Monbouquette, 2000).…”