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Shape-selective synthesis of palladium nanoparticles stabilized by highly branched amphiphilic polymers

Schlotterbeck, U., Aymonier, C., Thomann, R., Hofmeister, H., Tromp, M., Richtering, W. and Mecking, S. (2004) Shape-selective synthesis of palladium nanoparticles stabilized by highly branched amphiphilic polymers Advanced Functional Materials, 14, (10), pp. 999-1004. (doi:10.1002/adfm.200400053).

Record type: Article


Despite the broad interest in such materials, the synthesis of defined structures in the size range of 10 nm to ca. 1 micrometer ("mesoscopic") is challenging. Few routes shape-selectively afford geometrically regular structures other that the typical spherical metal particles of 1 to 10 nm. Moreover, these few routes are largely restricted to aqueous systems, however, for catalysis and other applications dispersions in organic solvents are desirable. Carbon monoxide reduction of a palladium(II) compound in combination with stabilization by (readily available) amphiphilic hyperbranched ploymers surprisingly affords dispersions of hexagonal platelets selectively with average sizes of thirty to several hundred nanometers in toluene. The size can be controlled by the polymer compositions. Transmission electron microscopy (TEM), electron diffraction, and extended x-ray absorption fine structure (EXAFS) spectroscopy demonstrate these palladium(0) platelets to be extremely thin (1 - 2 nm). Despite this high aspect ratio, the platelets prove quite shear resistant.

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Published date: 2004
Keywords: hyperbranched polymers, nanoparticles, palladium, synthesis, shape controlled


Local EPrints ID: 46691
ISSN: 1616-301X
PURE UUID: bd87078b-406a-4d97-9bc2-ddac321d444e

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Date deposited: 16 Jul 2007
Last modified: 17 Jul 2017 15:06

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Author: U. Schlotterbeck
Author: C. Aymonier
Author: R. Thomann
Author: H. Hofmeister
Author: M. Tromp
Author: W. Richtering
Author: S. Mecking

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