Sonochemical deposition of Au nanoparticles on titania and the significant decrease in the melting point of gold.

In this article, sub-micron size particles of titania were coated by a nanosized gold particles with the aid of power ultrasound. We could achieve a uniform coating of gold nanoparticles on a titania surface with a maximum gold loading of 10 wt%. In addition, we report on the experimental evidence for a significant decrease in the melting point of gold nanoparticles (<2 nm) by approximately 850 degrees C from that of the bulk material.

The influence of amino acids on the biomineralization of hydroxyapatite in gelatin.

The effects of pH on the calcium phosphate phase, of Tris and of amino acids, such as aspartic acid, glutamic acid, and serine on hydroxyapatite formation and morphology, were studied in double diffusion experiments. In this system, hydroxyapatite was only formed when the pH was around 7.4 or higher for the duration of the reaction.

Lead hydro sodalite [Pb2(OH)(H2O)3]2[Al3Si3O12]2: synthesis and structure determination by combining X-ray rietveld refinement, 1H MAS NMR FTIR and XANES spectroscopy.

Ion exchange of the sodium hydro sodalites [Na3(H2O)4]2-[Al3Si3O12]2 [Na4(H3O2)]2[Al3Si3O12]2 and [Na4(OH)]2[Al3Si3O12]2 with aqueous Pb(NO3)2 solutions yielded, whichever reactant sodalite phase was used, the same lead hydro sodalite, [Pb2(OH)-(H2O)3]2[Al3Si3O12]2. Thus, in the case of the non-basic reactant [Na3(H2O)4]2-[Al3Si3O12]2 an overexchange occurs with respect to the number of nonframework cationic charges. Rietveld structure refinement of the lead hydro sodalite based on powder X-ray diffraction data (cubic, a = 9.

Benzyltrimethylammonium hydroxide trihydrate containing hydroxide--water layers.

In the title compound, C(10)H(16)N(+) x OH(-) x 3H(2)O, two-dimensional bilayer-like arrays of organic cations and corrugated anionic hydroxide-water layers are stacked alternately along the c axis. All hydroxide and water H atoms are in ordered positions, giving rise to a network of hydrogen bonds [O..

NEt4OH.5H2O containing hydroxide-water layers.

In the title compound, tetraethylammonium hydroxide pentahydrate, C(8)H(20)N(+).OH(-).5H(2)O, layers of approximately hexagonally close-packed NEt(4)(+) cations and anionic layers of hydroxide and water molecules are stacked alternately along the b axis.