title: Wet-chemical synthesis of different bismuth telluride nanoparticles using metal organic precursors - single source vs. dual source approach.
abstract: Thermolysis of the single source precursor (Et2Bi)2Te in DIPB at 80 °C yielded phase-pure Bi4Te3 nanoparticles, while mixtures of Bi4Te3 and elemental Bi were formed at higher temperatures. In contrast, cubic Bi2Te particles were obtained by thermal decomposition of Et2BiTeEt in DIPB. Moreover, a dual source approach (hot injection method) using the reaction of Te(SiEt3)2 and Bi(NMe2)3 was applied for the synthesis of different pure Bi-Te phases including Bi2Te, Bi4Te3 and Bi2Te3, which were characterized by PXRD, REM, TEM and EDX. The influence of reaction temperature, precursor molar ratio and thermolysis conditions on the resulting material phase was verified. Moreover, reactions of alternate bismuth precursors such as Bi(NEt2)3, Bi(NMeEt)3 and BiCl3 with Te(SiEt3)2 were investigated.
authors.affiliation: Institute of Inorganic Chemistry and Center for Nanointegration Duisburg-Essen (CeNIDE), University of Duisburg-Essen, Universitätsstr. 5-7, D-45117 Essen, Germany. stephan.schulz@uni-due.de.
authors.forename: Georg
authors.initials: G
authors.lastname: Bendt
authors.forename: Anna
authors.initials: A
authors.lastname: Weber
authors.forename: Stefan
authors.initials: S
authors.lastname: Heimann
authors.forename: Wilfried
authors.initials: W
authors.lastname: Assenmacher
authors.forename: Oleg
authors.initials: O
authors.lastname: Prymak
authors.forename: Stephan
authors.initials: S
authors.lastname: Schulz
mesh_terms: D001729:Bismuth / Q000737:chemistry*; D003460:Crystallization; D008422:Materials Testing; D053758:Nanoparticles / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis*; D013499:Surface Properties; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature
chemical_list: D009942:Organometallic Compounds; C542787:bismuth telluride; D013691:Tellurium; D001729:Bismuth