Exploration of new methods for growing Ag films on Au(111) studied by ARPES
碩士 === 國立中央大學 === 物理研究所 === 95 === Thin film systems play important roles in technology industry and scientific investigation. However, preparing atomically flat thin films over a macroscopic region is not an easy thing. Our motivation is trying to find a new method for growing flat thin films over...
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| Format: | Others |
| Language: | en_US |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/74037756711870230320 |
| Summary: | 碩士 === 國立中央大學 === 物理研究所 === 95 === Thin film systems play important roles in technology industry and scientific investigation. However, preparing atomically flat thin films over a macroscopic region is not an easy thing. Our motivation is trying to find a new method for growing flat thin films over a macroscopic region. The system in our investigation we used is Ag/A2u(111) quantum well system. Electron confinement inside Ag films causes quantization of electronic energy states. We use angle resolved photoelectron spectroscopy to investigate the thickness variation of thin films.
The method we adopted is low temperature deposition and annealing to near room temperature. In the low coverage case, it could use the surface state to resolve the thickness variation. However in the high coverage case, it must use quantum well states to resolve. The results of our experiments show that low temperature deposition and annealing process is a good way to prepare flat thin films. The photoelectron spectra at different temperature measured during the annealing process shows some interesting physical phenomenon. We have a physical model to explain this phenomenon.
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