Imaging the phenol molecule adsorbed on TiO2(110) by scanning tunneling microscopy |
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| Institution: | 1. Mechanical Engineering Department, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada;2. Center for Advanced Materials and Related Technology, University of Victoria, Victoria, British Columbia V8W 2Y2, Canada;3. School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-2088, USA;1. University of Rijeka, Department of Physics, R. Matejcic 2, 51 000 Rijeka, Croatia;2. University of Rijeka, Centre for Micro- and Nanosciences and Technologies, R. Matejcic 2, 51 000 Rijeka, Croatia;3. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Vecna pot 113, 1000 Ljubljana, Slovenia;4. Rudjer Boskovic Institute, Bijenicka cesta 54, HR-10000 Zagreb, Croatia;5. Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia |
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| Abstract: | The image of a phenol molecule adsorbed on a TiO2(110) single crystal was obtained, for the first time, by using the STM. TiO2(110) has a tunneling active free region from + 1.35 eV below the Fermi level to −0.25 eV above the Fermi level. This region was found after measuring the surface density of states by using tunneling spectroscopy. The phenol molecule was fixed on TiO2 utilizing the amphoteric nature of the TiO2 surface. The image of the phenol molecule was measured at a dp bias of + 443 mV, which almost matches the energy of the OH and C-H stretching bond of the phenol molecule, in the free of energy levels region of the TiO2(110) substrate. The electron density of phenol ring is apparent in the STM picture. |
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