2005
DOI: 10.1021/jp058075i
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Mechanism of Photoinduced Superhydrophilicity on the TiO2 Photocatalyst Surface

Abstract: The physicochemical properties of the H(2)O molecules adsorbed on TiO(2) surfaces during UV light irradiation were fully investigated by near-infrared (NIR) absorption spectroscopy. It was found that the H(2)O molecules adsorbed on the TiO(2) surfaces desorb during UV light irradiation by the heating effect of the light source. Since the amount of the H(2)O adsorbed on the TiO(2) surfaces decreased, the distribution of the hydrogen bonds within the H(2)O molecules decreased, resulting in a decrease in the surf… Show more

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Cited by 273 publications
(215 citation statements)
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“…In addition, UV-treated surfaces yielded nearly 100 % bone-to-titanium implant contact, as opposed to less than 55 % for the untreated titanium surfaces (Aita et al, 2009b;Iwasa et al, 2010). This phenomenon has been attributed to the alteration of the physicochemical properties of the surface upon UV treatment, characterised by the removal of surface carbons, conversion of the surface status from hydrophobic to superhydrophilic and possible conversion of the surface charge (Aita et al, 2009b;Iwasa et al, 2010;Takeuchi et al, 2005b). Such findings were not only limited to titanium surfaces, but also for other implantable materials (Att et al, 2009a;Att et al, 2009c).…”
Section: Wwwecmjournalorg T Tuna Et Al Photofunctionalisation Of Zmentioning
confidence: 99%
“…In addition, UV-treated surfaces yielded nearly 100 % bone-to-titanium implant contact, as opposed to less than 55 % for the untreated titanium surfaces (Aita et al, 2009b;Iwasa et al, 2010). This phenomenon has been attributed to the alteration of the physicochemical properties of the surface upon UV treatment, characterised by the removal of surface carbons, conversion of the surface status from hydrophobic to superhydrophilic and possible conversion of the surface charge (Aita et al, 2009b;Iwasa et al, 2010;Takeuchi et al, 2005b). Such findings were not only limited to titanium surfaces, but also for other implantable materials (Att et al, 2009a;Att et al, 2009c).…”
Section: Wwwecmjournalorg T Tuna Et Al Photofunctionalisation Of Zmentioning
confidence: 99%
“…The phenomenon has been attributed to production of surface radical groups (1,(3)(4)(5) or photo-oxidation of hydrophobic surface contaminants (6)(7)(8), but its origin remains controversial (9,10) in part because conventional contact-angle analysis alone cannot fully account for the complex surface wettability (11). To address the fundamental mechanism responsible for superwetting, one has to go beyond the contact-angle measurement that reflects the specific surface properties and to probe the temporal growth dynamics of the water layer itself adsorbed on TiO 2 under wide-spectrum illumination of visible and near-infrared (NIR) in addition to UV light.…”
mentioning
confidence: 99%
“…The relationship between the surface electronic structure measured using the conventional PYSA and the photocatalytic activity have been reported by Yamagishi et al, 7 Song et al, 8 Miyamura et al, 9 and Fukumoto et al 10 On the other hand, the high wettability of the TiO2 surface has been extensively studied, [11][12][13][14][15][16][17] and has attracted considerable attention. Therefore, a newly designed PYSA was applied in order to evaluate the change in the TiO2 surface depending upon the humidity.…”
Section: Introductionmentioning
confidence: 89%