Morphological studies of SnO2 thin films fabricated by using e-beam method.
J Nanosci Nanotechnol
; 13(5): 3446-50, 2013 May.
Article
em En
| MEDLINE
| ID: mdl-23858876
ABSTRACT
This paper studies the variations in morphology of SnO2 nanostructures thin films deposited by using e-beam technique with the substrate temperature, oxygen partial pressure and the film thickness. The e-beam conditions were optimized to get crystalline nanosheets of SnO2. The films of 100-700 nm thickness were deposited on quartz substrates at temperatures ranging from room temperature (RT) to 300 degrees C and oxygen partial pressure ranging from 0 to 200 sccm. The nanostructured films have been characterized by means of X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and Energy dispersive spectroscopy (EDS) measurements. XRD results show that the films deposited at RT and 100 degrees C were amorphous, however, for 200 degrees C and 300 degrees C, the films showed crystalline nature with rutile structure. Also, the crystallinity increased with the increase of oxygen partial pressure. FE-SEM images revealed that at RT and 100 degrees C of substrate temperature, the film consist of spherical particles, whereas, the films deposited at 200 degrees C and 300 degrees C consist of sheet like morphology having thickness -40 nm and lateral dimension of 1 microm, respectively. The size of the nanosheets increased with the increase of substrate temperature and oxygen partial pressure due to the enhancement in the crystallinity of the films. A possible growth mechanism of the formation of SnO2 nanosheets is discussed.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Oxigênio
/
Compostos de Estanho
/
Nanoestruturas
/
Membranas Artificiais
Idioma:
En
Revista:
J Nanosci Nanotechnol
Ano de publicação:
2013
Tipo de documento:
Article