The effect of oxygen vacancies on water wettability of transition metal based SrTiO
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The effect of oxygen.pdf
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Author(s)
Sarkar, Tarapada
Annamalai, Meenakshi
Patra, Abhijeet
Prakash, Saurav
Motapothula, Mallikarjuna Rao
Venkatesan, T.
Ghosh, Siddhartha
Stoerzinger, Kelsey Ann
Lee, Yueh Lin
Shao-Horn, Yang
Date Issued
November 2016
Journal
RSC Adv.
Publisher
Royal Society of Chemistry, The
Citation
Sarkar, Tarapada, Siddhartha Ghosh, Meenakshi Annamalai, Abhijeet Patra, Kelsey Stoerzinger, Yueh-Lin Lee, Saurav Prakash, et al. “The Effect of Oxygen Vacancies on Water Wettability of Transition Metal Based SrTiO3 and Rare-Earth Based Lu2O3.” RSC Adv. 6, no. 110 (2016): 109234–109240.
Version
Final published version
Abstract
Understanding the structural, physical and chemical properties of the surface and interfaces of different metal-oxides and their possible applications in photo-catalysis and biology is a very important emerging research field. Motivated in this direction, this article would enable understanding of how different fluids, particularly water, interact with oxide surfaces. We have studied the water contact angle of 3d transition metal oxide thin films of SrTiO[subcript 3], and of 4f rare-earth oxide thin films of Lu2O[subcript 3]. These metal oxides were grown using pulsed laser deposition and they are atomically flat and with known orientation and explicitly characterized for their structure and composition. Further study was done on the effects of oxygen vacancies on the water contact angle of the 3d and 4f oxides. For 3d SrTiO[subcript 3] oxide with oxygen vacancies, we have observed an increase in hydroxylation with consequent increase of wettability which is in line with the previous reports whereas an interesting opposite trend was seen in the case of rare-earth Lu2O[subcript 3] oxide. Density functional theory simulations of water interaction on the above mentioned systems have also been presented to further substantiate our experimental findings.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1039/c6ra22391e
