2000 Fiscal Year Final Research Report Summary
Study of chemical evolution process by the fabrication of model soil surfaces
| Project/Area Number |
11640485
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
地球化学
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| Research Institution | Utsunomiya University |
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Principal Investigator |
EGAWA Chikashi Utsunomiya Univ., Graduate School of Eng., Asso.Prof., 工学研究科, 助教授 (30151963)
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| Co-Investigator(Kenkyū-buntansha) |
IWAI Hidekazu Utsunomiya Univ., Graduate School of Eng., Assistant, 工学研究科, 助手 (10311599)
MINAMI Nobumasa Utsunomiya Univ., Dept.of Edu., Assistant, 教育学部, 助手 (80292572)
INO Shozo Utsunomiya Univ., Dept.of Eng., Professor, 工学部, 教授 (70005867)
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| Project Period (FY) |
1999 – 2000
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| Keywords | NiO (111) thin film / Surface formate / Surface isocyanate / Magnetic thin film / STM / double modulation FT-IRS / RHEED |
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| Research Abstract |
1. Fabrication of model oxide surfaces
The growth condition of NiO (111) films on Ni (100) surface has been established. The NiO (111) films grow preferentially along the [011] direction of Ni (100) substrate at 300 K for the oxygen exposure above 500 L.The oxide films have ca. 11% shorter lattice spacing than in the bulk of NiO.Surface structure model for Cu (100) c (4x2)-O LEED pattern is newly proposed by the observation of atomic images in STM.RHEED patterns from magnetic thin films grown on MgO (100) surface show the morphological change of films depending on the thickness and annealing temperature.
2. Molecular orientation on model oxide surfaces
The adsorption and decomposition reaction of formic and isocyanic acids on Ni (100) and NiO (111) oxide films have been investigated by double-modulation FT-IR reflection absorption method. Surface formate derived from formic acid was perpendicularly adsorbed on both surfaces showing the symmetric OCO stretch mode. On the contrary, surface NCO from the dissociative adsorption of isocyanic acid inclined on NiO (111) surface estimated from the NCO asymmetric stretch mode.
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