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Shape-Selective Synthesis of Palladium Nanoparticles Stabilized by Highly Branched Amphiphilic Polymers

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2004

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Schlotterbeck, Ulf
Aymonier, Cyril
Thomann, Ralf
Hofmeister, Herbert
Tromp, Moniek
Richtering, Walter

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Advanced Functional Materials. 2004, 14(10), pp. 999-1004. ISSN 1057-9257. eISSN 1099-0712

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Despite the current broad interest in such materials, the synthesis of defined structures in the size range of 10 nm to ca. 1 μm (mesoscopic) is challenging. Few routes shape-selectively afford geometrically regular structures, other than 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 polymers 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 composition. 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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ISO 690SCHLOTTERBECK, Ulf, Cyril AYMONIER, Ralf THOMANN, Herbert HOFMEISTER, Moniek TROMP, Walter RICHTERING, Stefan MECKING, 2004. Shape-Selective Synthesis of Palladium Nanoparticles Stabilized by Highly Branched Amphiphilic Polymers. In: Advanced Functional Materials. 2004, 14(10), pp. 999-1004. ISSN 1057-9257. eISSN 1099-0712
BibTex
@article{Schlotterbeck2004Shape-9649,
  year={2004},
  title={Shape-Selective Synthesis of Palladium Nanoparticles Stabilized by Highly Branched Amphiphilic Polymers},
  number={10},
  volume={14},
  issn={1057-9257},
  journal={Advanced Functional Materials},
  pages={999--1004},
  author={Schlotterbeck, Ulf and Aymonier, Cyril and Thomann, Ralf and Hofmeister, Herbert and Tromp, Moniek and Richtering, Walter and Mecking, Stefan}
}
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