ǂa ǂphotothermal beam deflection study
S. Soumya (Author), Vimal Raj (Author), Mohanachandran Nair Sindhu Swapna (Author), Sankaranarayana Iyer Sankararaman (Author)

Abstract

The present work proposes a method of downscaling the thermal diffusivity (α) of MoO3 thin films through annealing temperature-induced nano-lamelle formation. The thermal diffusivity modification of the MoO3 films, prepared by the doctor blade method, is investigated by the sensitive transverse photothermal beam deflection technique. The X-ray diffraction analysis confirms the structural phase transformation from monoclinic to orthorhombic in the films annealed from 300 to 450 °C. The thermal induced anisotropy of the film is evident from the variation of the morphology index and texture coefficient. The field emission scanning electron microscopic analysis unveils the morphology modifications from blocks to the nano-lamelle structure with layers of average thickness ~ 77 nm. The thermal diffusivity measurement reveals a 53% reduction upon annealing the film to 450 °C. The drastic reduction is achieved through the annealing temperature-induced nano-lamelle formation and the phase transformation from monoclinic to orthorhombic in the MoO3 films.

Keywords

thermal diffusivity;molybdenum oxide;thin film;nano-lamelle;photothermal beam deflection;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 53
COBISS: 113766403 Link will open in a new window
ISSN: 2190-5444
Views: 438
Downloads: 22
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Other data

URN: URN:SI:UNG
Pages: str. 1-10
Volume: ǂVol. ǂ136
Issue: ǂiss. ǂ2
Chronology: 2021
DOI: 10.1140/epjp/s13360-021-01121-8
ID: 15822800