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Stable contrast mode on TiO2(110) surface with metal-coated tips using AFM
Yan Jun Li1, Huanfei Wen2, Quanzhen Zhang2
1Department of Applied Physics, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Japan; National Key Laboratory for Electronic Measurement and Technology, North University of China. No. 3, Xueyuan Road, Taiyuan, Shan Xi 030051, China.
Ultramicroscopy
|May 28, 2018
Summary
Researchers developed a stable atomic force microscopy method for TiO2 surfaces using a tungsten-coated silicon cantilever. This technique achieves 95% contrast, enabling detailed surface structure and electronic property analysis.
Area of Science:
- Surface Science
- Materials Science
- Nanotechnology
Background:
- Atomic Force Microscopy (AFM) is crucial for surface analysis.
- Achieving stable contrast and accurate surface geometry is challenging.
- Titanium dioxide (TiO2) surfaces are important in catalysis and electronics.
Purpose of the Study:
- To develop a stable contrast mode for Atomic Force Microscopy (AFM) on TiO2(110) surfaces.
- To demonstrate the role of a stable tip apex in obtaining accurate surface geometry.
- To enable atomic-resolution investigation of electronic structure and surface potential.
Main Methods:
- Utilized a tungsten-coated silicon cantilever for AFM measurements on TiO2(110).
- Employed a stable contrast mode achieving approximately 95% contrast rate.
- Correlated tip apex stability with surface geometry accuracy.
Main Results:
- A stable contrast mode with ~95% rate was achieved on TiO2(110).
- A stable tip apex is critical for accurate surface geometry during AFM.
- The W-coated Si cantilever successfully provided information on surface structure and tunneling current.
- Atomic-resolution investigation of electronic structure and surface potential was demonstrated.
Conclusions:
- The developed method provides stable contrast for high-resolution AFM on TiO2 surfaces.
- Stable tip apex is essential for reliable surface geometry determination.
- This technique facilitates detailed studies of electronic properties and holds potential for catalytic reaction mechanism investigations.
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