GaS single crystal layers have been thermally treated under argon flow for 4 h at two different temperatures (700 degrees C and 900 degrees C). The starting GaS sample and the annealed ones have been characterized by X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy. It was found that GaS transformed into beta-Ga2S3 through the formation of Ga2S3 intermediate phase. Moreover, such an oxidation process involved the growth of dense Ga2S3 sub-micron crystallites at a temperature of 700 degrees C and relatively long beta-Ga2S3 nanowires (up to 4 mu m) at a temperature of 900 degrees C. Experiments also evidenced that an intentional supply of oxygen was unfavourable both to the formation of Ga2S3 phase and to the growth of sub-micron crystallites and nanowires.

“Phase and morphological transformations of GaS single crystal surface by thermal treatment”

FILIPPO, Emanuela;SICILIANO, Tiziana;GENGA, Alessandra;MICOCCI, Gioacchino;SICILIANO, Maria;TEPORE, Antonio
2012-01-01

Abstract

GaS single crystal layers have been thermally treated under argon flow for 4 h at two different temperatures (700 degrees C and 900 degrees C). The starting GaS sample and the annealed ones have been characterized by X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy. It was found that GaS transformed into beta-Ga2S3 through the formation of Ga2S3 intermediate phase. Moreover, such an oxidation process involved the growth of dense Ga2S3 sub-micron crystallites at a temperature of 700 degrees C and relatively long beta-Ga2S3 nanowires (up to 4 mu m) at a temperature of 900 degrees C. Experiments also evidenced that an intentional supply of oxygen was unfavourable both to the formation of Ga2S3 phase and to the growth of sub-micron crystallites and nanowires.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/376315
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 9
social impact