Atomic species identification at the (101) anatase surface by simultaneous scanning tunnelling and atomic force microscopy
Entity
UAM. Departamento de Física Teórica de la Materia CondensadaPublisher
Nature Publishing GroupDate
2015-06-29Citation
10.1038/ncomms8265
Nature Communications 6 (2015): 7265
ISSN
2041-1723 (online)DOI
10.1038/ncomms8265Funded by
Work supported by the NIMS (AA002 and AF006 projects), by the MEXT KAKENHI Grant Number 26104540, by the Charles University (GAUK 339311) and by the Spanish MINECO (projects PLE2009-0061, MAT2011- 023627 and CSD2010-00024). Computer time was provided by the Spanish Supercomputing Network (RES, Spain) at the MareNostrum III Supercomputer (BCS, Barcelona), and by the PRACE initiative (project RA0986) at the Curie Supercomputer (CEA, France). O.S and V.M. thank the Charles University-NIMS International Cooperative Graduate School Program. J.W.R. thanks NIMS for funding through the NIMS Internship Program and ICIQ for his ICIQ FellowshipProject
Gobierno de España. PLE2009-0061; Gobierno de España. CSD2010-00024; Gobierno de España. MAT2011-023627Editor's Version
http://dx.doi.org/10.1038/ncomms8265Subjects
Atomic force microscopy; Scanning tunneling microscopy; Surface property; Photoactivation; FísicaRights
© 2015 Macmillan Publishers LimitedAbstract
Anatase is a pivotal material in devices for energy-harvesting applications and catalysis. Methods for the accurate characterization of this reducible oxide at the atomic scale are critical in the exploration of outstanding properties for technological developments. Here we combine atomic force microscopy (AFM) and scanning tunnelling microscopy (STM), supported by first-principles calculations, for the simultaneous imaging and unambiguous identification of atomic species at the (101) anatase surface. We demonstrate that dynamic AFM-STM operation allows atomic resolution imaging within the materiala € s band gap. Based on key distinguishing features extracted from calculations and experiments, we identify candidates for the most common surface defects. Our results pave the way for the understanding of surface processes, like adsorption of metal dopants and photoactive molecules, that are fundamental for the catalytic and photovoltaic applications of anatase, and demonstrate the potential of dynamic AFM-STM for the characterization of wide band gap materials
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Google Scholar:Stetsovych, Oleksandr
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Todorović, Milica
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Shimizu, Tomoko K.
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Moreno, César H.
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Ryan, James William
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Pérez León, Carmen
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Sagisaka, Keisuke
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Palomares, Emilio J.
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Matolín, Vladimír
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Fujita, Daisuke
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Pérez Pérez, Rubén
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Custance, Óscar
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