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      High-affinity adsorption leads to molecularly ordered interfaces on TiO2in air and solution

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          Most cited references 24

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          Light-induced amphiphilic surfaces

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            Surface infrared spectroscopy

             Y.J. Chabal (1988)
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              The role of interstitial sites in the Ti3d defect state in the band gap of titania.

              Titanium dioxide (TiO2) has a number of uses in catalysis, photochemistry, and sensing that are linked to the reducibility of the oxide. Usually, bridging oxygen (Obr) vacancies are assumed to cause the Ti3d defect state in the band gap of rutile TiO2(110). From high-resolution scanning tunneling microscopy and photoelectron spectroscopy measurements, we propose that Ti interstitials in the near-surface region may be largely responsible for the defect state in the band gap. We argue that these donor-specific sites play a key role in and may dictate the ensuing surface chemistry, such as providing the electronic charge required for O2 adsorption and dissociation. Specifically, we identified a second O2 dissociation channel that occurs within the Ti troughs in addition to the O2 dissociation channel in O(br) vacancies. Comprehensive density functional theory calculations support these experimental observations.
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                Author and article information

                Journal
                Science
                Science
                American Association for the Advancement of Science (AAAS)
                0036-8075
                1095-9203
                August 23 2018
                August 24 2018
                August 23 2018
                August 24 2018
                : 361
                : 6404
                : 786-789
                Article
                10.1126/science.aat6752
                © 2018

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