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Preparation, structural and optical properties of AWO4 (A = Ca, Ba, Sr) nanofilms
- Source :
- Materials Science and Engineering: B. 128:254-259
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- AWO4 (A = Ca, Ba, Sr) nanofilms on a glass substrate are prepared through the combination of the reverse micelle system with the dip-coating technology, in which collodion is used as a dispersant and film-forming agent. The nanofilms are characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL) and IR spectra, respectively. The results indicate that the tungstate nanoparticles having a tetragonal scheelite structure are well distributed on the substrate. PL results indicate that a blue-shift emission band peak of the nanofilms appears when they are excited at 240 nm relative to those of the bulk materials, and a red-shift emission band peak of nanofilms appears compared with nanoparticles, which can be attributed to the quantum size effect. IR spectra reveal that a large absorption band, which is ascribed to the W–O stretching vibration in WO4 tetrahedron, is observed around 820 cm−1.
- Subjects :
- Photoluminescence
Materials science
Scanning electron microscope
Mechanical Engineering
Analytical chemistry
Mineralogy
Infrared spectroscopy
Substrate (electronics)
Condensed Matter Physics
chemistry.chemical_compound
Tetragonal crystal system
Tungstate
chemistry
Mechanics of Materials
Absorption band
Scheelite
General Materials Science
Subjects
Details
- ISSN :
- 09215107
- Volume :
- 128
- Database :
- OpenAIRE
- Journal :
- Materials Science and Engineering: B
- Accession number :
- edsair.doi...........bdf52651b220af5e8d82e1c59efc7219
- Full Text :
- https://doi.org/10.1016/j.mseb.2005.11.040