Tailored TiO2(110) surfaces and their reactivity

C. L. Pang; O. Bikondoa; D. S. Humphrey; A. C. Papageorgiou; G. Cabailh; R. Ithnin; Q. Chen; C. A. Muryn; H. Onishi; G. Thornton

doi:10.1088/0957-4484/17/21/019

Tailored TiO₂(110) surfaces and their reactivity

C. L. Pang^*, O. Bikondoa, D. S. Humphrey, A. C. Papageorgiou, G. Cabailh, R. Ithnin, Q. Chen, C. A. Muryn, H. Onishi, G. Thornton

^*Corresponding author for this work

Faculty of Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Electron bombardment from a filament as well as voltage pulses from a scanning tunnelling microscope tip have been employed to modify the surface of TiO₂(110). Individual H atoms are selectively desorbed with electrical pulses of +3V from the scanning tunnelling microscope tip, whilst leaving the oxygen vacancies intact. This allows us to distinguish between oxygen vacancies and hydroxyl groups, which have a similar appearance in scanning tunnelling microscopy images. This then allows the oxygen vacancy-promoted dissociation of water and O₂ to be followed with the microscope. Electrical pulses between +5 and +10V induce local TiO ₂(110)1 × 2 reconstructions centred around the pulse. As for electron bombardment of the surface, relatively low fluxes increase the density of oxygen vacancies whilst higher fluxes lead to the 1 × 2 and other 1 × n reconstructions.

Original language	English
Article number	019
Pages (from-to)	5397-5405
Number of pages	9
Journal	Nanotechnology
Volume	17
Issue number	21
DOIs	https://doi.org/10.1088/0957-4484/17/21/019
Publication status	Published - 14 Nov 2006

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title = "Tailored TiO2(110) surfaces and their reactivity",

abstract = "Electron bombardment from a filament as well as voltage pulses from a scanning tunnelling microscope tip have been employed to modify the surface of TiO2(110). Individual H atoms are selectively desorbed with electrical pulses of +3V from the scanning tunnelling microscope tip, whilst leaving the oxygen vacancies intact. This allows us to distinguish between oxygen vacancies and hydroxyl groups, which have a similar appearance in scanning tunnelling microscopy images. This then allows the oxygen vacancy-promoted dissociation of water and O2 to be followed with the microscope. Electrical pulses between +5 and +10V induce local TiO 2(110)1 × 2 reconstructions centred around the pulse. As for electron bombardment of the surface, relatively low fluxes increase the density of oxygen vacancies whilst higher fluxes lead to the 1 × 2 and other 1 × n reconstructions.",

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AU - Pang, C. L.

AU - Bikondoa, O.

AU - Humphrey, D. S.

AU - Papageorgiou, A. C.

AU - Cabailh, G.

AU - Ithnin, R.

AU - Chen, Q.

AU - Muryn, C. A.

AU - Onishi, H.

AU - Thornton, G.

PY - 2006/11/14

Y1 - 2006/11/14

N2 - Electron bombardment from a filament as well as voltage pulses from a scanning tunnelling microscope tip have been employed to modify the surface of TiO2(110). Individual H atoms are selectively desorbed with electrical pulses of +3V from the scanning tunnelling microscope tip, whilst leaving the oxygen vacancies intact. This allows us to distinguish between oxygen vacancies and hydroxyl groups, which have a similar appearance in scanning tunnelling microscopy images. This then allows the oxygen vacancy-promoted dissociation of water and O2 to be followed with the microscope. Electrical pulses between +5 and +10V induce local TiO 2(110)1 × 2 reconstructions centred around the pulse. As for electron bombardment of the surface, relatively low fluxes increase the density of oxygen vacancies whilst higher fluxes lead to the 1 × 2 and other 1 × n reconstructions.

AB - Electron bombardment from a filament as well as voltage pulses from a scanning tunnelling microscope tip have been employed to modify the surface of TiO2(110). Individual H atoms are selectively desorbed with electrical pulses of +3V from the scanning tunnelling microscope tip, whilst leaving the oxygen vacancies intact. This allows us to distinguish between oxygen vacancies and hydroxyl groups, which have a similar appearance in scanning tunnelling microscopy images. This then allows the oxygen vacancy-promoted dissociation of water and O2 to be followed with the microscope. Electrical pulses between +5 and +10V induce local TiO 2(110)1 × 2 reconstructions centred around the pulse. As for electron bombardment of the surface, relatively low fluxes increase the density of oxygen vacancies whilst higher fluxes lead to the 1 × 2 and other 1 × n reconstructions.

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Tailored TiO₂(110) surfaces and their reactivity

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