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Titolo:
Polymer nanocomposites containing superstructures of self-organized platinum colloids
Autore:
Gianini, M; Caseri, WR; Suter, UW;
Indirizzi:
ETH Zentrum, Inst Polymers, Dept Mat, CH-8092 Zurich, Switzerland ETH Zentrum Zurich Switzerland CH-8092 Mat, CH-8092 Zurich, Switzerland
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 31, volume: 105, anno: 2001,
pagine: 7399 - 7404
SICI:
1520-6106(20010809)105:31<7399:PNCSOS>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEPENDENT COLOR FILTERS; GOLD CLUSTER MOLECULES; HYDROSILYLATION; NANOPARTICLES; FILMS; CIS-PTCL2(PHCH=CH2)2; MINERALIZATION; COMPOSITES; SYSTEMS; SILICA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Caseri, WR ETH Zentrum, Inst Polymers, Dept Mat, CH-8092 Zurich, Switzerland ETH Zentrum Zurich Switzerland CH-8092 92 Zurich, Switzerland
Citazione:
M. Gianini et al., "Polymer nanocomposites containing superstructures of self-organized platinum colloids", J PHYS CH B, 105(31), 2001, pp. 7399-7404

Abstract

Colloidal platinum (diameter 1-2 nm) in styrene was prepared in situ by reduction of a platinum(II) compound followed by partial evaporation of styrene, The resulting dispersions were purified from the reaction side-products, and ammonium O,O ' -dialk-yldithiophosphates of different chain length oroctadecanethiol was added. Polymerization was started with a radical initiator. Several parameters were varied and, particularly in the presence of long-chain dialkyldithiophosphates, self-assembled superstructures of metal colloids appeared at certain conditions in the resulting poly(styrene)-platinum nanocomposites. Unusual hollow shell structures of typical diameters of 50-300 nm were found, which phenomenologically resembled bilayer vesiclesin aqueous solutions, although the formation mechanism of the bilayers andthe superstructures in the nanocomposites is considered to differ. It is supposed that the formation of the superstructures in the nanocomposites is induced by crystallization of alkyl chains adsorbed at the platinum surfacebelow monolayer coverage.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 22:05:18