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Correlation between Raman spectra and color of tungsten trioxide (WO3) thermally evaporated from a tungsten filament
- Source :
- AIP Advances, Vol 11, Iss 5, Pp 055103-055103-8 (2021)
- Publication Year :
- 2021
- Publisher :
- AIP Publishing LLC, 2021.
-
Abstract
- The color exhibited by tungsten trioxide (WO3) can be associated with both its stoichiometry and crystallinity. Correlation between the color exhibited by WO3 powders and their purity and crystalline properties is reported in this paper. The WO3 powders were deposited by evaporation of tungsten trioxide from the surface of a tungsten filament. The WO3 powders exhibited three different shades of blue: navy, royal, and sky. The color of the WO3 powders changed to white after thermal treatment at 500 °C for 30 min in an ambient atmosphere. Raman analyses showed that transition from amorphous to crystalline WO3 started when the powders exhibited navy-blue color and ended when WO3 powders exhibited a white color. Scanning electron microscopy analysis showed particle agglomeration characteristics in all WO3 powders, even after they were thermally treated. The mechanism of deposition of WO3 from the tungsten filament was suggested to be governed by thermal evaporation of tungsten trioxide from the surface of the oxidized tungsten filament.
- Subjects :
- 010302 applied physics
Materials science
Scanning electron microscope
Physics
QC1-999
Analytical chemistry
General Physics and Astronomy
02 engineering and technology
Thermal treatment
021001 nanoscience & nanotechnology
01 natural sciences
Evaporation (deposition)
Tungsten trioxide
Amorphous solid
Crystallinity
chemistry.chemical_compound
symbols.namesake
chemistry
0103 physical sciences
symbols
Particle
0210 nano-technology
Raman spectroscopy
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 11
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi.dedup.....dd7f6be172adf05f10825bb5c9629a67