Accession Number : ADA291905

Title :   Synthesis of Nanocrystalline Indium Arsenide and Indium Phosphide from Indium(llI) Halides and Tris(trimethylsilyl)pnicogens; Synthesis, Characterization, and Decomposition Behavior of I3In.P(SiMe3)3.

Descriptive Note : Technical rept.,

Corporate Author : DUKE UNIV DURHAM NC DEPT OF CHEMISTRY

Personal Author(s) : Wells, Richard L. ; Aubuchon, Steven R. ; Kher, Shreyas S. ; Lube, Michael S. ; White, Peter S.

PDF Url : ADA291905

Report Date : 06 MAR 1995

Pagination or Media Count : 39

Abstract : Nanocrystalline indium arsenide and indium phosphide were synthesized by heating the products of the independent 1:1 mole ratio reactions of InX3 (X = Cl, Br, I) with As(SiMe3)3 and P(SiMe3)3, respectively, and the 2:1 mole ratio reaction of InCl3 with As(SiMe3)3. The 1:1 mole ratio reaction of As(SiMe3)3 with InCl3 produced a black powder, which after annealing at 400 deg C afforded InAs crystallites of up to 99.96% purity with an average domain size of 9 nm. InAs obtained from the separate 1:1 mole ratio reactions of InBr3 and InI3 with As(SiMe3)3 and the 2:1 mole ratio reaction of InCl3 with As(SiMe3)3 consisted of crystallites with average domain sizes of 10, 12, and 16 nm, and purities of 99.65%, 85.95%, and 87.90%, respectively. The independent 1:1 mole ratio reactions of InCl3 and InBr3 with P(SiMe3)3 both produced colored powders, which after annealing afforded nanocrystalline InP particles with respective purities of 91.53% and 93.08% and average domain size of approximately 4 nm for both samples. The 1:1 mole reaction of InI3 with P(SiMe3)3 afforded the 1:1 adduct I3In.P(SiMe3)3 (I). Compound 1 crystallizes in the monoclinic system, space group P (2 sub 1/c), with a = 16.074(7), b = 9.730(3), C = 16.454(6) A, V = 2362.1(15) A(3), D(sub calc) = 2.098 g/cu cm for Z = 4; the In-P bond length is 2.537(3) A. Decomposition of 1 affords nanocrystalline InP of 84.06% purity with an approximate average domain size of 2.5 nm. jg

Descriptors :   *CRYSTAL STRUCTURE, *HALIDES, *ARSENIDES, *INDIUM PHOSPHIDES, ANNEALING, METHYL RADICALS, SYNTHESIS, PARTICLES, SILICON, COLORS, HEATING, BLACK POWDER.

Subject Categories : Inorganic Chemistry
      Organic Chemistry
      Physical Chemistry
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE