Hydrothermal preparation and characterization of nanocrystalline Silver gallium sulfides

Citation
Jq. Hu et al., Hydrothermal preparation and characterization of nanocrystalline Silver gallium sulfides, SOLID ST SC, 3(3), 2001, pp. 275-278
Citations number
27
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE SCIENCES
ISSN journal
1293-2558 → ACNP
Volume
3
Issue
3
Year of publication
2001
Pages
275 - 278
Database
ISI
SICI code
1293-2558(200103/04)3:3<275:HPACON>2.0.ZU;2-M
Abstract
The hydrothermal reaction route was developed to prepare nanocrystalline si lver gallium sulfides AgGaS2 and alpha -Ag9GaS6, respectively. X-ray powder diffraction patterns indicated tetragonal phase AgGaS2 with cell constants a = 5.765 and c = 10.281 Angstrom, and orthorhombic phase alpha -Ag9GaS6 w ith cell constants a = 10.756, b = 7.806, and c = 7.605 Angstrom. Transmiss ion electron microscopy images revealed that nanocrystalline AgGaS2 consist ed of uniform spherical particles with grain sizes of 6-12 nm and nanocryst alline alpha -Ag9GaS6 displayed whisker-like particles with an average size of 20 x 5 nm. The room temperature photoluminescence spectrum of nanocryst alline AgGaS2 was found to be one broad emission feature at 446 nm. A possi ble formation mechanism of silver gallium sulfides was proposed. (C) 2001 E ditions scientifiques et medicales Elsevier SAS. All rights reserved.