1999 Fiscal Year Final Research Report Summary
ANALYSIS AND CONTROL OF THE ELEMENTARY REACTION PROCESS USING MODIFIED SURFACES AND APPLICATION FOR THE CREATION OF NEW MATERIAL PHASES
| Project/Area Number |
10450016
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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 |
表面界面物性
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| Research Institution | Tohoku University (2000)
Institute of Applied Physics, University of Tsukuba (1998-1999) |
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Principal Investigator |
SHIGEKAWA Hidemi INSTITUTE OF APPLIED PHYSICS UNIVERSITY OF TSUKUBA ASSOCIATE PROFESSOR, 物理工学系, 助教授 (20134489)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAKE Koji INSTITUTE OF APPLIED PHYSICS UNIVERSITY OF TSUKUBA RESEARCH ASSOCIATE, 物理工学系, 助手 (30302392)
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| Project Period (FY) |
1998 – 2000
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| Keywords | STM / SURFACE / ELEMENTAL CHEMICAL REACTION / SILICON / CYCLODEXTRIN / SELF-ASSEMBLY / DNA |
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| Research Abstract |
9-1 On the Si(111)-7×7 surface, HBOィイD22ィエD2 molecular reaction was found to show characteristic site preference completely different from that of other group metals. The selective reaction site of oxygen atoms was explained by their electronegativity and charge distribution in the surface adatoms. However, regarding the selectivity for the boron atoms, introduction of the surface strain effect was found to be essential. Stability of the 7×7 structure was also analyzed by the results of B induced phase transition.
9-2 Xe/Cu and Kr/Pt system showed quite intriguing adsorption characteristics compared to the other rare-gas on metal system. Interaction between Xe atoms at the step site was repulsive. And Kr did not absorb at the step site. These results were analyzed in detail on the basis of the low-temperature STM images.
9-3 (1) On the bis(ethylenedithio)tetrathiafulvalene-based organic compounds, an ordered-defect structure was observed on the β-(BEDT-TTF)ィイD22ィエD2PFィイD26ィエD2, and was explained by the similar mechanism as those governing the reconstruction of inorganic polar surfaces such as GaAs(111). (2) Considerably long modulations were observed on the β-(BEDT-TTF)ィイD22ィエD2PFィイD26ィエD2 surface by STM at 285 K instead of its well known 2×|c| 2kィイD2FィエD2 CDW superstructure. The observed STM result was comprehensively explained by the CDW structure based on the susceptibility χ(Q) calculated by taking into account the change in the molecular charge on the polar surface. (3) Quite a unique mechanism was found to exist in the surface stabilization processes of the molecular crystal. Namely, inter and intra molecular distortions and relations play important roles in the formation of the surface structures of the organic materials.
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Research Products
(40 results)
