title: Solution-based synthesis of GeTe octahedra at low temperature.
abstract: GeTe octahedra were prepared by reaction of equimolar amounts of GeCl2·dioxane and Te(SiEt3)2 in oleylamine, whereas a slight excess of the Te precursor yielded GeTe octahedra decorated with elemental Te nanowires, which can be removed by washing with TOP. The mechanism of the GeTe formation is strongly influenced by the solvent. The expected elimination of Et3SiCl (dehalosilylation) only occurred in aprotic solvents, whereas Te(SiEt3)2 was found to react with primary and secondary amines with formation of silylamines. Temperature-dependent studies on the reaction in oleylamine showed that crystalline GeTe particles are formed at temperatures higher than 140 °C. XRD, SAED, and HRTEM studies proved the formation of rhombohedral GeTe nanoparticles. These findings were confirmed by a single-crystal and powder X-ray analysis. The rhombohedral structure modification was found, and the structure was solved in the acentric space group R3m.
authors.affiliation: Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen , Universitätsstraße 5-7, D-45117 Essen, Germany.
authors.forename: Stephan
authors.initials: S
authors.lastname: Schulz
authors.forename: Stefan
authors.initials: S
authors.lastname: Heimann
authors.forename: Kevin
authors.initials: K
authors.lastname: Kaiser
authors.forename: Oleg
authors.initials: O
authors.lastname: Prymak
authors.forename: Wilfried
authors.initials: W
authors.lastname: Assenmacher
authors.forename: Jörg Thomas
authors.initials: JT
authors.lastname: Brüggemann
authors.forename: Bert
authors.initials: B
authors.lastname: Mallick
authors.forename: Anja-Verena
authors.initials: AV
authors.lastname: Mudring