title: Hybrid composites of monodisperse pi-conjugated rodlike organic compounds and semiconductor quantum particles.
abstract: Composite materials of quantum particles (Q-particles) arranged in layers within crystalline powders of pi-conjugated, rodlike dicarboxylic acids are reported. The synthesis of the composites, either as three-dimensional crystals or as thin films at the air-water interface, comprises a two-step process: 1) The preparation of the Cd salts 6 (Cd), 8 (Cd) or Pb salts 6 (Pb), 8 (Pb) of the oligo(p-phenyleneethynylene)dicarboxylic acids 6 (H), 8 (H), in which the metal ions are arranged in ribbons and are separated by the long axis of the organic molecules, as demonstrated by X-ray powder diffraction analysis of the solids and grazing incidence X-ray diffraction analysis of the films on water. 2) Topotactic solid/gas reaction of these salts with H(2)S to convert the metal ions into Q-particles of CdS or PbS embedded in the organic matrix that consists of the acids 6 (H) and 8 (H). These hybrid materials have been characterized by X-ray photoelectron spectroscopy and transmission electron microscopy.
authors.affiliation: Department of Materials and Interfaces, The Weizmann Institute of Science, 76100 Rehovot. Israel.
authors.forename: Volker
authors.initials: V
authors.lastname: Hensel
authors.forename: Adelheid
authors.initials: A
authors.lastname: Godt
authors.forename: Ronit
authors.initials: R
authors.lastname: Popovitz-Biro
authors.forename: Hagai
authors.initials: H
authors.lastname: Cohen
authors.forename: Torben R
authors.initials: TR
authors.lastname: Jensen
authors.forename: Kristian
authors.initials: K
authors.lastname: Kjaer
authors.forename: Isabelle
authors.initials: I
authors.lastname: Weissbuch
authors.forename: Efrat
authors.initials: E
authors.lastname: Lifshitz
authors.forename: Meir
authors.initials: M
authors.lastname: Lahav