Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films

TiO2nanoparticle thin films with a high roughness were successfully deposited on quartz substrates by a sparking process. To obtain a uniform film thickness, the substrate was moved raster-like across an area of 1 × 1 cm2by the x-y scanning stage. Effects of annealing temperatures on surface morphol...

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Main Authors:	W. Thongsuwan, T. Kumpika, P. Singjai
Format:	Journal
Published:	2018
Subjects:	Materials Science Physics and Astronomy
Online Access:	https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79959774486&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50064
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Institution:	Chiang Mai University

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spelling	th-cmuir.6653943832-500642018-09-04T04:29:45Z Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films W. Thongsuwan T. Kumpika P. Singjai Materials Science Physics and Astronomy TiO2nanoparticle thin films with a high roughness were successfully deposited on quartz substrates by a sparking process. To obtain a uniform film thickness, the substrate was moved raster-like across an area of 1 × 1 cm2by the x-y scanning stage. Effects of annealing temperatures on surface morphology, chemical structure, photocatalytic and wetting properties were examined by scanning and transmission electron microscopy, atomic force microscopy, Raman spectroscopy, UV-vis spectroscopy and contact angle measurement, respectively. The sample annealed at the optimum temperature of 500 °C shows the highest RMS roughness, photocatalytic activity and also the lowest water contact angle. An optimum anatase/rutile ratio and maximum RMS roughness were believed to be the reason for the above results. In contrast with most previous reports, the films prepared by this process remain highly superhydrophilic after 5 weeks without UV exposure. © 2011 Elsevier B.V. All rights reserved. 2018-09-04T04:23:11Z 2018-09-04T04:23:11Z 2011-09-01 Journal 15671739 2-s2.0-79959774486 10.1016/j.cap.2011.03.002 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79959774486&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50064
institution	Chiang Mai University
building	Chiang Mai University Library
country	Thailand
collection	CMU Intellectual Repository
topic	Materials Science Physics and Astronomy
spellingShingle	Materials Science Physics and Astronomy W. Thongsuwan T. Kumpika P. Singjai Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films
description	TiO2nanoparticle thin films with a high roughness were successfully deposited on quartz substrates by a sparking process. To obtain a uniform film thickness, the substrate was moved raster-like across an area of 1 × 1 cm2by the x-y scanning stage. Effects of annealing temperatures on surface morphology, chemical structure, photocatalytic and wetting properties were examined by scanning and transmission electron microscopy, atomic force microscopy, Raman spectroscopy, UV-vis spectroscopy and contact angle measurement, respectively. The sample annealed at the optimum temperature of 500 °C shows the highest RMS roughness, photocatalytic activity and also the lowest water contact angle. An optimum anatase/rutile ratio and maximum RMS roughness were believed to be the reason for the above results. In contrast with most previous reports, the films prepared by this process remain highly superhydrophilic after 5 weeks without UV exposure. © 2011 Elsevier B.V. All rights reserved.
format	Journal
author	W. Thongsuwan T. Kumpika P. Singjai
author_facet	W. Thongsuwan T. Kumpika P. Singjai
author_sort	W. Thongsuwan
title	Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films
title_short	Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films
title_full	Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films
title_fullStr	Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films
title_full_unstemmed	Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films
title_sort	effect of high roughness on a long aging time of superhydrophilic tio 2 nanoparticle thin films
publishDate	2018
url	https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79959774486&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/50064
_version_	1681423522664022016

Effect of high roughness on a long aging time of superhydrophilic TiO 2 nanoparticle thin films

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