Nanoparticle cadmium sulfide

Carrot, G. Scholz, S. M. Plummer, C. J. G. Hilbron, J. G. and Hedrick, L. J. (1999). Synthesis and Characterization of Nanoscopic Entitles Based on Poly(Caprolactone)-Grafted Cadmium Sulfide Nanoparticles. Chem. Mater., 11, 3571-3577. 

Pal B, Torimoto T, Iwasaki K, Shibayama T, Takahashi H, Ohtani B (2004) Size and structure-dependent photocatalytic activity of jingle-beU-shaped silica-coated cadmium sulfide nanoparticles for methanol dehydrogenation. J Phys Chem B 108 18670-18674... 

DNA hybridization based on cadmium sulfide nanoparticle tags. Electrochem Commun 4 ... 

Nanoparticles such as those of the heavy metals, like cadmium selenide, cadmium sulfide, lead sulfide, and cadmium telluride are potentially toxic [14,15]. The possible mechanisms by which nanoparticles cause toxicity inside cells are schematically shown in Fig. 2. They need to be coated or capped with low toxicity or nontoxic organic molecules or polymers (e.g., PEG) or with inorganic layers (e.g., ZnS and silica) for most of the biomedical applications. In fact, many biomedical imaging and detection applications of QDs encapsulated by complex molecules do not exhibit noticeable toxic effects [16]. One report shows that the tumor cells labeled with QDs survived in circulation and extravasated into tissues... 

J. Wang, G. Liu, and R. Polsky, Electrochemical stripping detection of DNA hybridization based on cadmium sulfide nanoparticle tags. Electrochem. Common. 4, 722—726 (2002). 

Dutta P, Fendler JH (2002) Preparation of cadmium sulfide nanoparticles in self-reproducing reversed micelles. J Colloid Interface Sci 247 47-53... 

The approach described later on in this chapter builds upon a report in 2002, in which we proposed microfluidic reactors as favourable systems for nanoparticle synthesis, and showed that nanocrystalline cadmium sulfide prepared in such reactors exhibited improved monodispersity compared with particles prepared in conventional bulk-scale vessels (Edel et al., 2002). 

Keywords Kinetics, photocatalysis, Cadmium sulfide, nanoparticles, colloids, electron transfer, photoreduction... 

By using polymer-controlled growth in ethylenediamine at 170°C, very long CdS nanowires (100px40 nm) were synthesized (Fig. 9a) [36]. Cadmium sulfide with different morphologies, such as nanoparticles and nanorods (Fig. 9b) [39], peanut-like nanostructures [37] and hollow nanospheres [38] (Fig. 9c) were prepared via solvothermal routes. 

PHOTOLUMINESCENCE AND EPR SPECTRA OF MANGANESE-DOPED CADMIUM SULFIDE NANOPARTICLES... 

Photoluminescence and EPR spectra of manganese-doped cadmium sulfide nanoparticles. 

Besides cadmium sulfide, other semiconductor particles can also be loaded in zeolite microporous crystals. Moller et al. prepared cadmium sulfide nanoparticles in zeolite Y through a similar approach.[117] Nevertheless, structural analysis indicates that the formed cluster particles are actually rather complex, and apart from cadmium sulfide clusters, there exist other nanoclusters such as Cd404 or Cd202Se in the channels of zeolite Y. These nanoclusters are not isolated, and they strongly interact with the framework oxygen of the zeolite. 

Due to the presence of the ionic P4VP-Re-complex block on the film surface, nanoparticles decorated with anionic functional groups can be deposited on the copolymer film surface by electrostatic attraction. The copolymer film was immersed into a solution of cadmium sulfide nanoparticles (diameter = 10 nm), functionalized with carboxylate groups on the particle surface. The attachment of cadmium sulfide nanoparticles on the film surface was confirmed by X-ray photoelectron spectroscopy (XPS). In addition, particles deposited on the cylindrical blocks in the copolymer film surface were also observed in AFM image (Figure 5.12). This approach has potential in fabricating nanoparticle-polymer composites on patterned surface. 

Figure 5.12 AFM image of PS-h-P4VP-[Re(DIAN)(C0)3]+C10F deposited with cadmium sulfide nanoparticles. (From Cheng and Chan.71 Reprinted with permission. Copyright 2005 American Chemical Society.)...

The enhancement can be explained also by an excitation transfer from Si nanocrystallites to Eu ions. Other authors [10] have shown similar results by comparing the PL of Eu in silica gel and in silica gel with colloidal cadmium sulfide. They show that CdS nanoparticles enhanced Eu fluorescence due to energy transfer from a surface trap in the CdS particles to Eu ions. 

Nanocrystalline metal (silver and copper) and metal sulfide (silver sulfide, cadmium sulfide, and lead sulfide) particles were prepared via RESOLV (Rapid Expansion of a Supercritical Solution into a Liquid SOLVent) with water-in-carbon dioxide microemulsion as solvent for the rapid expansion. The nanoparticles were characterized using UV/vis absorption. X-ray powder diffraction, and transmission electron microscopy methods. The results of the different nanoparticles are compared and discussed in reference to those of the same nanoparticles produced via RESOLV with the use of conventional supercritical solvents. 

The results presented above show that Cu nanoparticles can be produced via RESOLV with PFPE-NH4-stabilized water-in-C02 microemulsion as solvent for the rapid expansion. The formation of Cu nanoparticles is apparently similar to that of Ag nanoparticles under comparable experimental conditions (9). The same approach is also applicable to the synthesis of nanoscale metal sulfides, including silver sulfide (Ag2S), cadmium sulfide (CdS), and lead sulfide (PbS) nanoparticles. 

This touch sensor is made from nanoparticles of gold and cadmium sulfide. 

III. CADMIUM SULFIDE NANOPARTICLES IN SUSPENSIONS OF LIPID VESICLES, THEIR PROPERTIES, AND METHODS OF PREPARATION... 

By means of X-ray Bragg-Brentano diffraction experiment and ab initio calculation of powder diffraction intensity using Debye equation it is shown that the atomic structure of cadmium sulfide (CdS) nanoparticles prepared by the wet chemical method is disordered. They have a closed packed atomic structure with the tetrahedral coordination for both elements, cadmium and sulfur, but with a non-periodical sequence of the closed-packed planes A, B, and C. 

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