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Title: The effect of oxygen vacancies on water wettability of transition metal based SrTiO3 and rare-earth based Lu2O3
Authors: Sarkar, T 
Ghosh, S 
Annamalai, M 
Patra, A 
Stoerzinger, K
Lee, Y.-L
Prakash, S 
Motapothula, M.R 
Shao-Horn, Y
Giordano, L
Venkatesan, T 
Keywords: Contact angle
Density functional theory
Oxide films
Pulsed laser deposition
Rare earths
Strontium alloys
Strontium titanates
Thin films
Transition metal compounds
Transition metals
3d transition metals
Density functional theory simulations
Effect of oxygen
Physical and chemical properties
Surface and interfaces
Water contact angle
Water interactions
Water wettability
Oxygen vacancies
Issue Date: 2016
Citation: Sarkar, T, Ghosh, S, Annamalai, M, Patra, A, Stoerzinger, K, Lee, Y.-L, Prakash, S, Motapothula, M.R, Shao-Horn, Y, Giordano, L, Venkatesan, T (2016). The effect of oxygen vacancies on water wettability of transition metal based SrTiO3 and rare-earth based Lu2O3. RSC Advances 6 (110) : 109234-109240. ScholarBank@NUS Repository.
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 SrTiO3, and of 4f rare-earth oxide thin films of Lu2O3. 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 SrTiO3 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 Lu2O3 oxide. Density functional theory simulations of water interaction on the above mentioned systems have also been presented to further substantiate our experimental findings. © 2016 The Royal Society of Chemistry.
Source Title: RSC Advances
ISSN: 20462069
DOI: 10.1039/c6ra22391e
Appears in Collections:Staff Publications

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