skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Relation between crystallinity and chemical nature of surface on wettability: A study on pulsed laser deposited TiO{sub 2} thin films

Abstract

Pure titania (TiO{sub 2}) polycrystalline thin films in rutile, anatase and mixed phase have been grown on amorphous glass substrates by pulsed laser deposition method at various oxygen gas pressure. Wettability investigations have been carried out on these films. Consistent with our previous report [J. Phys. D: Appl. Phys. 41, 155308 (2008)] it has been observed that for nearly same surface roughness large contact angle or superhydrophobicity is present when sample has a pure single phase and lower contact angle or hydrophobicity when mixed phases were present. Structural characterizations suggest that in addition to roughness, pure phase film surface associated with hydrophobic sites and mixed phase film surface show association of both hydrophobic and hydrophilic sites, which might be inducing specific wetting character. UV treatment induces superhydrophilicity in the films. It was observed that UV irradiation causes nonequilibrium state on the TiO{sub 2} surface, leading to changes in the electron density, which in turn produces decrement in the crystallinity and lattice expansion. Reversible changes in the wetting state on the pure phase surfaces were observed to be faster than those on the mixed phase surfaces. We tried to establish the possible relation between crystalline phases, chemical nature of surface onmore » reversible wettability besides the main governing parameter viz. surface roughness.« less

Authors:
 [1]; ; ;  [2];  [3];  [4]
  1. DST Unit on Nanoscience, Indian Institute of Science Education and Research, Pune, 411021 (India)
  2. UGC-DAE Consortium for Scientific Research Indore Centre, Indore, 452017 (India)
  3. Laboratoire Leon Brillouin (CEA-CNRS), CEA/Saclay, 91191 Gif-sur-Yvette Cedex (France)
  4. DST Unit on Nanoscience, Indian Institute of Science Education and Research, Pune, 411021 India (India)
Publication Date:
OSTI Identifier:
21538436
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 109; Journal Issue: 12; Other Information: DOI: 10.1063/1.3594695; (c) 2011 American Institute of Physics; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ELECTRON DENSITY; ENERGY BEAM DEPOSITION; FALLOUT; GLASS; INVENTORIES; LASER RADIATION; LEVELS; OXYGEN; POLYCRYSTALS; PULSED IRRADIATION; REMOTE SENSING; ROUGHNESS; SEMICONDUCTOR MATERIALS; SIMULATION; SUBSTRATES; THIN FILMS; TITANIUM OXIDES; TRANSPORT THEORY; ULTRAVIOLET RADIATION; CHALCOGENIDES; CRYSTALS; DEPOSITION; ELECTROMAGNETIC RADIATION; ELEMENTS; FILMS; IRRADIATION; MATERIALS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; RADIATIONS; SURFACE COATING; SURFACE PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS

Citation Formats

Shirolkar, Mandar M, Department of Physics, University of Pune, 411007, Phase, Deodatta, Sathe, Vasant, Choudhary, Ram Janay, Rodriguez-Carvajal, J, Kulkarni, Sulabha K, and Banasthali University, Banasthali, 304022 Rajasthan. Relation between crystallinity and chemical nature of surface on wettability: A study on pulsed laser deposited TiO{sub 2} thin films. United States: N. p., 2011. Web. doi:10.1063/1.3594695.
Shirolkar, Mandar M, Department of Physics, University of Pune, 411007, Phase, Deodatta, Sathe, Vasant, Choudhary, Ram Janay, Rodriguez-Carvajal, J, Kulkarni, Sulabha K, & Banasthali University, Banasthali, 304022 Rajasthan. Relation between crystallinity and chemical nature of surface on wettability: A study on pulsed laser deposited TiO{sub 2} thin films. United States. https://doi.org/10.1063/1.3594695
Shirolkar, Mandar M, Department of Physics, University of Pune, 411007, Phase, Deodatta, Sathe, Vasant, Choudhary, Ram Janay, Rodriguez-Carvajal, J, Kulkarni, Sulabha K, and Banasthali University, Banasthali, 304022 Rajasthan. 2011. "Relation between crystallinity and chemical nature of surface on wettability: A study on pulsed laser deposited TiO{sub 2} thin films". United States. https://doi.org/10.1063/1.3594695.
@article{osti_21538436,
title = {Relation between crystallinity and chemical nature of surface on wettability: A study on pulsed laser deposited TiO{sub 2} thin films},
author = {Shirolkar, Mandar M and Department of Physics, University of Pune, 411007 and Phase, Deodatta and Sathe, Vasant and Choudhary, Ram Janay and Rodriguez-Carvajal, J and Kulkarni, Sulabha K and Banasthali University, Banasthali, 304022 Rajasthan},
abstractNote = {Pure titania (TiO{sub 2}) polycrystalline thin films in rutile, anatase and mixed phase have been grown on amorphous glass substrates by pulsed laser deposition method at various oxygen gas pressure. Wettability investigations have been carried out on these films. Consistent with our previous report [J. Phys. D: Appl. Phys. 41, 155308 (2008)] it has been observed that for nearly same surface roughness large contact angle or superhydrophobicity is present when sample has a pure single phase and lower contact angle or hydrophobicity when mixed phases were present. Structural characterizations suggest that in addition to roughness, pure phase film surface associated with hydrophobic sites and mixed phase film surface show association of both hydrophobic and hydrophilic sites, which might be inducing specific wetting character. UV treatment induces superhydrophilicity in the films. It was observed that UV irradiation causes nonequilibrium state on the TiO{sub 2} surface, leading to changes in the electron density, which in turn produces decrement in the crystallinity and lattice expansion. Reversible changes in the wetting state on the pure phase surfaces were observed to be faster than those on the mixed phase surfaces. We tried to establish the possible relation between crystalline phases, chemical nature of surface on reversible wettability besides the main governing parameter viz. surface roughness.},
doi = {10.1063/1.3594695},
url = {https://www.osti.gov/biblio/21538436}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 12,
volume = 109,
place = {United States},
year = {Wed Jun 15 00:00:00 EDT 2011},
month = {Wed Jun 15 00:00:00 EDT 2011}
}