2004 Fiscal Year Final Research Report Summary
Measurement of nanotribological properties of molecularry thin lubricant by using optical fiber probe
| Project/Area Number |
15360084
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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 |
Design engineering/Machine functional elements/Tribology
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| Research Institution | Nagoya University |
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Principal Investigator |
FUKUZAWA Kenji Nagoya University, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (60324448)
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| Co-Investigator(Kenkyū-buntansha) |
MITSUYA Yasunaga Nagoya University, Graduate School of Engineering, Professor, 工学研究科, 教授 (10200065)
ZHANG Hedong Nagoya University, Graduate School of Information Science, Assistant, 情報科学研究科, 助手 (80345925)
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| Project Period (FY) |
2003 – 2004
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| Keywords | tribology / rheology / nanoscopic measurement / micromachine / optical fiber / magnetic recording |
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| Research Abstract |
A novel method for measuring dynamic shear force at a high shear rate with precise gap control has been developed to clarify the rheological properties of confined perfluoropolyether lubricant. We call this new method "fiber wobbling method". In this method, an optical fiber is used as a probe and measuring amplitude and phase shift of the fiber shearing a lubricant film provides the rheological properties. The fiber wobbling method requires highly sensitive force sensing due to the small shear force generated by thin liquid films. In this study, we have demonstrated that a highly sensitive shear force measurement method with a minimum detection force of the order of sub-nN. This method uses an optical fiber probe as a microlens and measures the displacement of the laser spot on a position sensitive detector. In addition, we have demonstrated that a double-ended tuning fork-based force sensor is feasible to detect vertical force during sliding.
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