A Rapid Synthesis of Oriented Palladium Nanoparticles by UV Irradiation

Palladium nanoparticles of average size around 8 nm have been synthesized rapidly by UV irradiation of mixture of palladium chloride and potassium oxalate solutions. A rod-shaped palladium oxalate complex has been observed as an intermediate. In the absence of potassium oxalate, no Pd nanoparticles have been observed. The synthesized Pd nanoparticles have been characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), selective area electron diffraction and energy dispersive analysis by X-rays (EDAX) analyses. XRD analysis indicates the preferential orientation of catalytically active {111} planes in Pd nanoparticles. A plausible mechanism has been proposed for the formation of anisotropic Pd nanoparticles

Direct Relationship Between Shape and Size of Template and Synthesis of Copper Metal Particles

A first key step in the control of biomineralization is the self assembly of an appropriate microstructure template, within which minerals of a required structure and shape might be induced to form under controlled conditions. This templating strategy i

Mesostructured fluids: supra aggregates made of interdigitated reverse micelles

In this paper we describe in detail the phase diagram Cu(AOT)(2)-water-isooctane in the oil rich region. The phase diagram is very rich. All the phases described are thermodynamically stable. In this paper we concentrate in the isotropic region obtained at rather large water content (29 &lt; w = [H2O]/[AOT] &lt; 40). A transition from interconnected cylinder to reverse micelles is observed. At high surfactant concentration the system does not have enough oil to solvate the surfactant alkyl chains and large aggregates made of interdigitated reverse micelles are surrounded by isolated water in oil droplets. (C) 2000 Elsevier Science B.V. All rights reserved.</p

Mesostructured fluids. 1. Cu(AOT)(2)-H2O-isooctane in oil rich regions

The phase behavior of copper(II) bis(2-ethylhexyl) sulfosuccinate, Cu(AOT)(2)-isooctane-water, is determined over a wide domain. The system exhibits an extraordinarily diverse range of phases. The microstructures have been characterized by small-angle X-ray scattering, conductivity, and freeze fracture electron microscopy. It is shown that elementary considerations that require only notions of local curvature and global packing constraints are sufficient to determine microstructure.</p