Deposition of Ag and Ag-Au nanocrystalline films with tunable conductivity at the water-toluene interface.

Thin films of Au, Ag and Ag-Au alloy nanocrystals extending to areas of several square centimetres are obtained by deposition at the interface of water and toluene. Toluene containing chlorotris(triphenylphosphine)silver(i) and/or chlorotriphenylphosphine gold(i) is reacted with aqueous tetrakishydroxymethylphosphonium chloride to obtain nanocrystalline films adhered to the interfacial region. Alloying was induced by varying the composition of the toluene layer.

Substituent effects on charge transport in films of Au nanocrystals.

Charge transport (CT) in films of arylthiol-capped Au nanocrystals (NCs) exhibits strong substituent effects, with electron-donating substituents markedly decreasing conductivity. Films suited for measurements were obtained by ligand-exchange reactions on AuNCs grown at the water/toluene interface. Detailed analysis suggests the NCs interact with the ligands by resonance rather than inductive effects.

Growth of nanocrystals and thin films at the water-oil interface.

The use of the water-oil interface provides significant advantages in the synthesis of inorganic nanostructures. Employing the water-toluene interface, luminescent CdS nanocrystals have been obtained at a relatively modest temperature of 35 degrees C. The diameters of the particulates can be varied between 1.

An analysis of systematic reviews undertaken on standard advanced wound dressings in the last 10 years.

Many systematic reviews have found insufficient evidence to support claims that modern dressings promote healing, or that one particular modern dressing is more effective than another. This paper evaluates why this might be the case.