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Room and high-temperature scanning tunnelling microscopy and spectroscopy (HT-STM/STS) investigations of surface nanomodifications created on the TiO2(1 1 0) surface |
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| Authors: | Z Klusek A Busiakiewicz R Schmidt P Kowalczyk W Olejniczak |
| Institution: | a Division of Physics and Technology of Nanometer Structures, Department of Solid State Physics, University of Lodz 90-236 Lodz, Pomorska 149/153, Poland b Advanced Materials Research Institute, Northumbria University, Ellison Building, Ellison Place, Newcastle upon Tyne, NE1 8ST, UK c Department of Materials Science, Pembroke Street, Cambridge CB2 3QZ, UK |
| Abstract: | High-temperature scanning tunnelling microscopy, scanning tunnelling spectroscopy and current imaging tunnelling spectroscopy (HT-STM/STS/CITS) were used to study the topographic and electronic structures changes due to surface modifications of the TiO2(1 1 0) surface caused by the STM tip. In situ high-temperature STM results showed that the created modifications were stable even at elevated temperatures. The STS/CITS results showed the presence of energy gap below the Fermi level on the untreated regions. The disappearance of energy gap below the Fermi level on the modifications created by the tip was observed. It is assumed that the presence of the tip can change the chemical stoichiometry of the surface from TiO2−x towards Ti2O3. |
| Keywords: | Scanning tunnelling microscopy Scanning tunnelling spectroscopy Surface states Titanium oxide |
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