1995 Fiscal Year Final Research Report Summary
Construction of nano laboratory based on molecular dynamics
| Project/Area Number |
06452192
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Intelligent mechanics/Mechanical systems
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| Research Institution | The University of Tokyo |
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Principal Investigator |
NAKAO Masayuki The Univ.of Tokyo, Dept.of Eng.Synthesis, Associate Prof., 大学院・工学系研究科, 助教授 (90242007)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUMOTO Yoichiro The Univ.of Tokyo, Dept.of Eng.Synthesis, Prof., 大学院・工学系研究科, 教授 (60111473)
HATAMURA Yotaro The Univ.of Tokyo, Dept.of Eng.Synthesis, Prof., 大学院・工学系研究科, 教授 (40010863)
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| Project Period (FY) |
1994 – 1995
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| Keywords | Molecular dynamics / Nano laboratory / Micro contact / Micro sliding / Micro plastic flow / SEM |
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| Research Abstract |
The purpose of the research is construct a "nano laboratory" for verifying molecular dynamics. It is composed of a precise actuator, a fine force sensor and dynamic SEM observation. It can analyze a reciprocal action of atoms wihch have a surface roughness and a relative velocity. Though it measures the tiny atoms, an operator can change a process consciously in order to achieve ujdge and knowledge using dynamic vision, force and sound. Because of its function, we call it a alaboratory, not a measuring device.
We made experiments with the laboratory in a field emission type SEM and calculations with molecular dynamics. Next we compared the both an checked the coincidence.
We tried to make the both of the following micro phenomena : 1) deformation of carbon or gold of the plate on which ceramics or metal of the needle is slid with a real contact area of 0.1 mum in diameter, 2) Pressure of an air between the solid plates with a gap of 0.05 mum at a velocity of 1 m/s, 3) plastic flow of aluminum which is cut by a diamond blade of 0.05mum in tip radius, 4) re-deformation of indented hole of 0.1mum in depth which Ni-Ti makes by a twin mechanism after a heat treatment.
From the tesult of experiments and calculations, We clarified that calculations of phenomena of 10,000 atoms for several fs take about 1 day even with a super computer, and that experiments need to redece a working area to about 10 nm area to compare with calculation reslt. But the function of the nano laboratory is realized ; the physical phenomena is qualitatively analyzed because the operator achieves his knowledge from the experimental result.
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