2007 Fiscal Year Final Research Report Summary
Study of atomistic diffusion, nucleation and cluster formation process of atoms and molecules
| Project/Area Number |
17340091
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics I
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| Research Institution | Tohoku University |
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Principal Investigator |
SUTO Shozo Tohoku University, Tohoku University, Graduate School of Science, Professor (40171277)
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| Co-Investigator(Kenkyū-buntansha) |
SAZAKI Gen Institute for Materials Research, 金属材料研究所, Lecturer (60261509)
YAMADA Taro The Institute of Physical and Chemical research, Researcher (10174723)
HAYAKAWA Yoshinori Graduate School of Science, 大学院・理学研究科, Associate Professor (20218556)
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| Project Period (FY) |
2005 – 2007
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| Keywords | Nano-cluster formation / Atomistic diffusion process / Nucleation / STM / Thin film growth |
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| Research Abstract |
Recently, it is possible to observe atomistic motion of single atoms or single molecules on solid surfaces due to the development of surface probe microscopy, in particular scanning tunneling microscopy (STM). First goal of this study is to understand a cluster formation process from atomistic diffusion of single atoms, just after deposition up to 8 hours. We observed the atomistic motion of Ag atoms on a Si(111)7x7 surface and the formation process of (Ag)n clusters in a 7x7 surface potentials. It is found that the diffusion is cooperative where the hopping rates depend on the nearest neighbor sites. We also measured the tunneling spectroscopy and found that the n=5 and 6 clusters have a specific electronic energy level: Second goal is to investigate the weakest interaction between substrate and the adsorbate atoms or molecules. We observed two -epitaxial structures of pentacene polycrystalline thin film crystals on a hydrogen-terminated Si(111) surface and commensurabilites. Furthermore, we observed the step-induced anisotropic growth of pentacene thin film crystals on a hydrogen-terminated Si(111) surface. In the early stage of this study, we proposed the process for ultra-clean and atomically controlled hydrogen-terminated Si(111)-(1x1) Surface and it is revealed by high resolution electron energy loss spectroscopy, atomic force microscopy and scanning tunneling microscopy. We also propose the deuterium terminated Si(111) surface and observed the surface phonons. Third goal is to investigate the strong interaction between substrate and the adsorbate atoms. Formation process and surface structure of platinum silicide thin layers was studied using STM.
Now, we are able to manipulate the single atom or molecule and, then, we try to estimate the cluster size and the electronic structure. Our final goal is to understand the cluster formation process, surface reaction and to form an electronic devices in the atomic scale.
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[Presentation] H:Si(111)-(1×1)表面の初期酸化課程2008
Author(s)
木村大介, 瀧川知昭, 田岡琢己, 加藤大樹, 山田太郎, P. Murgan川添良幸, 粕谷厚生, 須藤彰三
Organizer
日本表面科学会, 平成19年度日本表面科学会東北・北海道支部講演会
Place of Presentation
東北大学
Year and Date
2008-03-14
Description
「研究成果報告書概要(和文)」より
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[Presentation] 高品位H: Si(111)1×1表面作成法と表面フォノン2007
Author(s)
加藤大樹, 田岡琢己, 西方督, 佐崎元, 山田太郎, R. Czajka, A. Wawro, 中嶋一雄, 粕谷厚生, 須藤彰三
Organizer
日本物理学会, 第62回年次大会
Place of Presentation
北海道大学
Year and Date
2007-09-21
Description
「研究成果報告書概要(和文)」より
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[Presentation] Evolution Mechanism of Domain Structure of Polycrystalline Pentacene Thin Films Epitaxially Grown on H-Si(111)2006
Author(s)
G. Sazaki, S. Nishikata, J. T. Sadowski, A. Al-Mahboob, Y. Fujikawa, T. Nishihara, S. Suto, T. Sakurai, and K. Nakajima
Organizer
International Conference on Nanoscience and Technology (STM'06)
Place of Presentation
Congress Center, Basel, Switzerland
Year and Date
2006-08-01
Description
「研究成果報告書概要(和文)」より
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[Presentation] Evolution Mechanism of Domain Structure of Polycrystalline Pentacene Thin Films Epitaxially Grown on H-Si(111)2006
Author(s)
G. Sazaki, S. Nishikata, J.T. Sadowski, A. Al-Mahboob, Y. Fujikawa, T. Nishihara, S. Suto, T. Sakurai, K. Nakajima
Organizer
International Conference on Nanoscience and Technology(STM''06)
Place of Presentation
Congress Center, Basel, Switzerland
Year and Date
2006-08-01
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation and Characterization of H:Si(111)1×1 Surface using STM/STS, AFM and HREELS2006
Author(s)
S. Suto, H. Kato, T. Taoka, J. Osiecki, T. Yamada, S. Nishikata, G. Sazaki, K. Nakajima, R. Czajka, A. Wawro, A. Kasuya
Organizer
4th International Conference on Scanning Probe Spectroscopy and 1st International Workshop on Spin-Polarized. Scanning Tunneling Microscopy
Place of Presentation
University of Hamburg, Germany
Year and Date
2006-07-26
Description
「研究成果報告書概要(和文)」より
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[Presentation] Preparation and Characterization of H:Si(111)1×1 Surface using STM/STS, AFM and HREELS2006
Author(s)
S. Suto, H. Kato, T. Taoka, J. Osiecki, T. Yamada, S. Nishikata, G. Sazaki, K. Nakajima, R. Czajka, A. Wawro, A. Kasuya
Organizer
4^<th> International Conference on Scanning Probe Spectroscopy and 1^<st> International Workshop on Spin-Polarized Scanning Tunneling Microscopy
Place of Presentation
University of Hamburg, Germany
Year and Date
2006-07-26
Description
「研究成果報告書概要(欧文)」より
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[Presentation] HREELS, AFM, STM and STS Study of Hydrogen and Deuterium Terminated Si(111)-(1×1)Surfaces2005
Author(s)
S. Suto, H. Kato, H. Nagashima, R. Czajka, A. Wawro, T. Taoka, T, Motoya, S. Nishikata, G. Sazaki, K. Nakajima, and A. Kasuya
Organizer
International Symposium on Surface Science and Nanotechnology (ISSS-4)
Place of Presentation
Omiya Sonic City, Saitama, Japan
Year and Date
2005-11-16
Description
「研究成果報告書概要(和文)」より
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[Presentation] Ideal Methyl Termination of the Si(111) Surface2005
Author(s)
Taro Yamada, Maki Kawai, Andrzej Wawro, Shozo Suto, and Atsuo Kasuya
Organizer
International Symposium on Surface Science and Nanotechnology (ISSS-4)
Place of Presentation
Omiya Sonic City, Saitama, Japan
Year and Date
2005-11-16
Description
「研究成果報告書概要(欧文)」より
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[Presentation] HREELS, AFM, STM and STS Study of Hydrogen and Deuterium Terminated Si(111)-(1x1) Surfaces2005
Author(s)
S. Suto, H. Kato, H. Nagashima, R. Czajka, A. Wawro, T. Taoka, T, Motoya, S. Nishikata, G. Sazaki, K. Nakajima, and A. Kasuya
Organizer
International Symposium on Surface Science and Nanotechnology (ISSS-4)
Place of Presentation
Omiya Sonic City, Saitama, Japan
Year and Date
2005-11-16
Description
「研究成果報告書概要(欧文)」より
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