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Title: Solid-to-solid phase transformations of nanostructured selenium-tin thin films induced by thermal annealing in oxygen atmosphere

The structural and morphological evolution of nanostructured thin films obtained from thermal evaporation of polycrystalline Sn-Se starting charge as a function of the subsequent annealing temperature in an oxygen flow has been analysed. High-resolution transmission electron microscopy, small area electron diffraction, digital image processing, x-ray diffraction and Raman spectroscopy have been employed in order to investigate the structure and the morphology of the obtained films. The results evidenced, in the temperature range from RT to 500°C, the transition of the material from a homogeneous mixture of SnSe and SnSe{sub 2} nanocrystals, towards a homogeneous mixture of SnO{sub 2} and SeO{sub 2} nanocrystals, with an intermediate stage in which only SnSe{sub 2} nanocrystals are present.
Authors:
 [1] ;  [2] ; ;  [3]
  1. Physics Applied to Material Science interdepartmental Laboratory (PAMS-Lab) - Dipartimento di Beni Culturali - Università del Salento - Lecce (Italy)
  2. Dipartimento Scienze di Base ed Applicate all'Ingegneria, and CNIS - Sapienza Università di Roma, Roma (Italy)
  3. Physics Applied to Material Science interdepartmental Laboratory (PAMS-Lab) - Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali - Università del Salento - Lecce (Italy)
Publication Date:
OSTI Identifier:
22311372
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1603; Journal Issue: 1; Conference: Nanoforum 2013, Rome (Italy), 18-20 Sep 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNEALING; ELECTRON DIFFRACTION; EVAPORATION; HOMOGENEOUS MIXTURES; IMAGE PROCESSING; MORPHOLOGY; NANOSTRUCTURES; OXYGEN; POLYCRYSTALS; RAMAN SPECTROSCOPY; SELENIUM; SELENIUM OXIDES; THIN FILMS; TIN; TIN OXIDES; TIN SELENIDES; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION