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A Combined Small-angle Scattering Study of a Chemical Reaction at Specific Sites and Reaction-induced Self-assembly as a Problem in Open Non-equilibrium Phenomena by Takeji Hashimoto; Hirokazu Tanaka; Satoshi Koizumi; Kensuke Naka; Yoshiki Chujo is a Materials Science article available to read on EtoBox.

What is A Combined Small-angle Scattering Study of a Chemical Reaction at Specific Sites and Reaction-induced Self-assembly as a Problem in Open Non-equilibrium Phenomena about?

As a problem in open non-equilibrium phenomena, small-angle scattering (SAS) studies of chemical reactions at specific sites and reaction-induced selfassembly of a system which is obtained by mixing two stable solutions of palladium acetate [Pd(OAc) 2 ] in N,N-dimethylformamide and the secondgeneration polyamidoamine dendrimer in methanol are presented. The selfassembly was studied using a combination of neutron and X-ray SAS. The results revealed that the self-assembly involves the initial formation of aggregates of an average radius of 20 nm composed of the dendrimers and Pd(OAc) 2 followed by formation of palladium nanoparticles of a radius of 2.0 nm inside the aggregates. The aggregates were found to provide a special field for a chemical reaction for reduction of Pd(II) ions with methanol and for the self-assembly of the reduction products of Pd(0) atoms into nanoparticles. The nanoparticles are found to be trapped and stabilized in the aggregates.

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Author

Takeji Hashimoto; Hirokazu Tanaka; Satoshi Koizumi; Kensuke Naka; Yoshiki Chujo

Publisher

International Union of Crystallography; Blackwell Publishing Inc.; International Union of Crystallography (IUCr) (ISSN 0021-8898)

Published

2007

Language

EN

Field

Materials Science (Physical Sciences)