The effect of oxygen vacancies on water wettability of transition metal based SrTiO3 and rare-earth based Lu2O3

Tarapada Sarkar, Siddhartha Ghosh, Meenakshi Annamalai, Abhijeet Patra, Kelsey Stoerzinger, Yueh Lin Lee, Saurav Prakash, Mallikarjuna Rao Motapothula, Yang Shao-Horn, Livia Giordano, T. Venkatesan

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)109234-109240
Number of pages7
JournalRSC Advances
Volume6
Issue number110
DOIs
StatePublished - 2016
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2016 The Royal Society of Chemistry.

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