Gold nanoparticles, stabilization

Scheme 1. The solvent-free controlled thermolysis of gold(I) thiolate complex producing gold nanoparticles stabilized by alkyl groups derived from the precursor.

Gold nanoparticles stabilized by primary amine, tertiary amine, sulfide, and thiols... 

Scheme 2. Production of size-regulated gold nanoparticles stabilized by primary amines, tertiary amines, sulfides, and thiols formed by the controlled thermolysis of gold(I) thiolate complex in the presence of amine (reprinted from Ref. [11], 2005, with permission from Elsevier).

J.J. Feng, G. Zhao, J.J. Xu, and H.Y. Chen, Direct electrochemistry and electrocatalysis of heme proteins immobilized on gold nanoparticles stabilized by chitosan. Anal. Biochem. 342, 280-286 (2005). 

Xu J, Han X, Liu H L, Hu Y (2005) Synthesis of monodisperse gold nanoparticles stabilized by gemini surfactant in reverse micelles. J Dispers Sci Technol 26 473-476... 

Some important observations, which should apply de facto to many nematic systems containing dispersed nanoparticles, particularly those with metal or semiconductor cores, were reported in 2006 by Prasad et al. [297]. The authors found that gold nanoparticles stabilized with dodecanethiol decreased the isotropic to nematic phase transition of 4-pentyl-4 -cyanobiphenyl (5CB) almost linearly with increasing nanoparticle concentration (x p) and increased the overall conductivity of these mixtures by about two orders of magnitude. However, the anisotropy of the electric conductivity (Act = [Pg.349]

Wang Y, Wei G, Wen F, Zhang X, Zhang W, Shi L (2008) Synthesis of gold nanoparticles stabilized with poly((V-isopropylacrylamide)-co-poly(4-vinyl pyridine) colloid and their application in responsive catalysis. J Mol Catal A Chem 280 1-6... 

Fig. 1. Examples of metal clusters and nanoparticles synthesized by radiolysis, (a) STM image of a silver oligomer (Agf+) in the presence of PA [reproduced with permission from Ref 34, copyright 1994 Elsevier], (b) AEM image of silver nanoparticles stabilized by PVA and deposited onto mica [reproduced with permission from Ref 12, copyright 2006 Elsevier], (c) AFM image of gold nanoparticles stabilized by PVA and self-assembled onto mica in a 2D network, [reproduced with permission from Ref 12, copyright 2006 Elsevier].

Shan, C. S., Li, F. H.,Yuan, F Y., Yang,G. F, Niu, L.,and Zhang, Q. (2008]. Size-controlled sjmthesis of monodispersed gold nanoparticles stabilized by polyelectrol3d e-functionalized ionic liquid. Nanotechnology, 19, pp. 285601-285606. 

Feng JJ, Zhao G, Xu JJ, Chen HY. Direct electrochemistry tmd electrocatalysis of heme proteins immobUized on gold nanoparticles stabilized by chitosan. Anal Biochem. 2005 342(2) 280-6. 

The TEM image of gold nanoparticles stabilized by water-soluble pil-lar[5]arenes at a concentration of 200 pM reveals a spherical shape with an average diameter of 1.88 0.58 nm and the relatively narrow particle size distribution. The well-defined Ctystalline planes can be observed from the high-resolution TEM image. 

With regard to carbojylated pillar[ ]arenes, Park, in collaboration with Kim et al., reported a facile one-pot hydrothermal method for the synthesis of gold nanoparticles stabilized by carbojg lated pillar[5]arene that were highly stable against pH variations. The HAuCU (0.01%) was refluxed in water (10 mL) for 10 min, followed by the addition of CP[5]A solution (1%, 0.3 mL H2O). After refluxing the solution mixture for 1 h, spherical gold nanoparticles were obtained. 

Figure 22.6 shows the tumor growth dynamics in several experimental series using Theraphthal, octasodium salt of zinc octacarboxyphthalocya-nine (ZnPc), and gold nanoparticles stabilized with polyethylene glycol. 

Millan MD, Taranekar P, Waenkaew P, Advincula RC (2005) Formation of gold nanoparticles stabilized by a star block copolymer and simultaneous polymerization of a dithiophenylpyrrole monomer. Polymer Preprints 46 652-653... 

The presence of coarse gold particles on the surface of modified zirconium oxide leads to its low catalytic activity the maximum CO conversion is only achieved at T = 450-500°C and is as low as 6%. Such a low degree of CO conversion is in all probability due to an inhomogeneous distribution of gold clusters over the support surface. So, modified zirconia is not favourable to gold nanoparticles stabilization. 

Kameyama, T., Ohno, Y., Kurimoto, T., Okazaki, K., Uematsu, T., Kuwabata, S. Torimoto, T. (2010). Size control and immobilization of gold nanoparticles stabilized in an ionic liquid on glass substrates for plasmonic applications, Phys. Chem. Chem. Phys. 12 1804-1811. 

Wang, Z., Zhang, Q., Kuehner, D., Ivaska, A. Niu, L. (2008). Green synthesis of 1-2 nm gold nanoparticles stabilized by amine-terminated ionic liquid and their electrocatalytic activity in oxygen reduction. Green Chem. 10 907-909. 

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