Au-nanopartides

Broqvist, P., Molina, L.M., Gronbecka, H. and Hammer, B. (2004) Promoting and poisoning effects of Na and Cl coadsorption on CO oxidation over MgO-supported Au nanopartides. Journal of Catalysis, 227, 217-226. 

Ge, Q., Song, C. and Wang, L. (2006) A density functional theory study of CO adsorption on Pt—Au nanopartides. Computational Material Science, 35, 247-253. 

Metallic nanoparticles have been synthesized in vivo using plants. Intracellular synthesis of gold nanopartides was demonstrated using the sweet desert willow (Chilopsis linearis) plant [95]. The average size of Au nanopartides formed in various tissues was dependent on the concentration of Au in the respective tissues. Haver-kamp et al. [96] synthesized a gold-silver-copper alloy in vivo using the Brasskajuncea plant. 

Synthesis of DNA-Au hybrid nanocomposites holds promise for applications in nanotechnology. Following the pioneering work of Mirkin et al., these modified Au nanopartides can act as useful building blocks to form spatially well-defined superstructures, including nanocrystals [108], binary and multilayered nanoparticle assemblies [109,110] and also well-ordered 3D nanoclusters [111]. 

Au-nanopartide nanowires based on DNA and polylysine templates. Angewandte Chemie-International Edition, 41, 2323-2327. 

The effect of addition of hexadecanethiol to an aqueous solution of the aminoclay-Au nanopartide composite was examined and the result is shown in Fig. 5a. Immediately after the addition, the alkanethiol forms a dear nonaqeous layer on top of the pink... 

Fig. 4 TEM images of (a) Ail-clay nanoparticle composites. Inset histogram of Au nanopartides (b) Ag-clay nanopartides composite. Insets (bottom left) histogram of Ag nanopartides (top right) Pt nanopartides show layered arrangement.

By employing Cgo/Cgo as a probe-redox couple it is possible to estimate the apparent Fermi levels of Ti02 and TiOz/Au nanopartides [184]. The partide size of... 

A. Dawson P. V. Kamat, Semiconductor-metal nanocomposites. Photo-induced fusion and photocatalysis of gold-capped Ti02 (Ti02/Au) nanopartides./. Phys. Chem. B 2001, 105, 960-966. 

Shipway I. Willner, Assembly of Zn(II)-porphyrin-bipyridinium dyad and Au-nanopartide superstructures on conductive surfaces. J. Am. Chem. Soc. 1999, 121, 258-259. 

Au-Nanopartide Hybrids of Horse Heart Cytochrome c and P. aeruginosa Azurin... 

Fig. 5.5 TEM image of Au nanopartides in a titania-coated silica composite aerogel.

AMP) (20), bridged through a hybridization of the (21)-nudeic acid-functionalized CdSe/ZnS QDs and the (22)-nucleic acid-functionalized Au nanopartides, led to QD-Au nanopartide aggregates in which the fluorescence of the QDs was quenched by the gold nanopartides (Figure 6.20a). In the presence of AMP, the aptamer-AMP... 

On the other hand, grafting of ED on PET was not successful. After the grafting of plasma treated PET with ED and Au nanopartides the peak at 761 cm (S-Au) in FTIR spectra was not detected. This finding supports the conclusion that no Au nanopartides are bonded to the PET treated in ED [54]. 

Effect ofthe size of Au nanopartides In manyreactions catalyzed by Au catalysts, the size of Au NPs markedly affects the catalytic activities and product selectivities [42, 131]. Figure 3.16 shows that a diameter of 2-5 nm is optimum for the production of PO whereas smaller Au clusters, below 2nm, produce almost exclusively... 

Figure 3.13 Self-assembly of mixed Pt and Au nanopartides onto PDDA-functionalized...

Additives can be used to further stabilize nanopartides in imidazolium based ionic liquids. Stabilization with polyvinylpyrrolidone (PVP) is necessary to obtain stable mono- and bimetallic Pt/Au nanopartides immobilized in [C4MIm ][PF6 ].1971 Also, ionic liquid-like copolymers can be used to stabilize Rhi ] and Pt 199] nanopartides, where [C4MIm+][BF4-] itself can not stabilize the platinum nanopartides sufficiently. 199]... 

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