Accession Number : ADA302848

Title :   Synthesis, Characterization and Immobilization of Nanocrystalline Binary and Ternary III-V (13-15) Compound Semiconductors.

Descriptive Note : Technical rept.

Corporate Author : DUKE UNIV DURHAM NC DEPT OF CHEMISTRY

Personal Author(s) : Halaoui, Lara I. ; Kher, Shreyas S. ; Lube, Michael S. ; Aubuchon, Steven R. ; Hagan, Carolynne R.

PDF Url : ADA302848

Report Date : 20 DEC 1995

Pagination or Media Count : 24

Abstract : Two synthetic routes to nanocrystalline III-V (13-15) materials are discussed. The first employs dehalosilylation reactions between Group III trihalides and E(SiMe3)3 (E = P, As) in hydrocarbon solvents affording nanocrystalline III-V semiconductors or their precursors. The second involves reactions of MX3 (M = Ga, X = Cl, I; M = In, X = Cl, I) in glymes with in situ synthesized (Na/K)3E (E = P, As, Sb) in aromatic solvents, yielding nanocrystalline GaP, GaAs, GaSb, InP, InAs and InSb after refluxing reaction mixtures. Materials are characterized by TEM, XRD, Elemental Analysis, NMR, UV-vis, and STM. STM images of InAs give particle size distributions and confirm sample conductivity. Scanning tunneling spectroscopy shows a larger bandgap for nanocrystalline InAs than for InAs wafers, consistent With quantum confinement. jg p3

Descriptors :   *SEMICONDUCTORS, *GROUP III COMPOUNDS, *GROUP IV COMPOUNDS, *GROUP V COMPOUNDS, *TERNARY COMPOUNDS, *BINARY COMPOUNDS, SCANNING, PARTICLE SIZE, NUCLEAR MAGNETIC RESONANCE, SPECTROSCOPY, DISTRIBUTION, SYNTHESIS, QUANTUM THEORY, GALLIUM ARSENIDES, TUNNELING(ELECTRONICS), X RAY DIFFRACTION, MIXTURES, MICROSCOPY, RESPONSE, HYDROCARBONS, CHLORIDES, HALIDES, RESTRAINT, SOLVENTS, ROUTING, AROMATIC COMPOUNDS, CONFINEMENT(GENERAL), INDIUM PHOSPHIDES, ORGANIC SOLVENTS, PHOSPHORUS, ARSENIC, INDIUM ANTIMONIDES, GALLIUM PHOSPHIDES, GALLIUM ANTIMONIDES, IODIDES.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Electrical and Electronic Equipment
      Crystallography
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE