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Physical Review Letters
Volumn 72, Issue 22, 1994, Pages 3546-3549
Ansiotropy in friction and molecular stick-slip motion
Author keywords

[No Author keywords available]
Indexed keywords

EID: 0001737343     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.72.3546     Document Type: Article
Times cited : (153)
References (15)
  • 5
    • 84927875059 scopus 로고    scopus 로고
    • SPI3700 AFM, Seiko Instruments Inc., Chiba, Japan.
  • 6
    • 84927875058 scopus 로고    scopus 로고
    • A review of FFM: R. Overney and E. Meyer, MRS Bull. 18, No. 5, 26 (1993).
  • 8
    • 84927875057 scopus 로고    scopus 로고
    • R. M. Overney, H. Takano, M. Fujihira, G. Overney, W. Paulus, and H. Ringsdorf, in ``Forces in Scanning Probe Methods,'' edited by H.-J. Güntherodt, D. Anselmetti, and E. Meyer, NATO ASI, 1–18 March 1994, Schluchsee, Germany (Kluwer Dordrecht, The Netherlands, to be published).
  • 9
    • 84927875056 scopus 로고    scopus 로고
    • Many commercial AFM instruments provide today the possibility of scan rotation. For friction force measurements, the scanner moves perpendicularly to the cantilever beam to achieve highest resolution. Variations of the angle of the scanning movement (scan rotation) causes alterations in the geometrical setup and changes the lateral bending (or torsion) of the cantilever. This intrinsic problem of scan rotation requires each time a new calibration of the friction force. To avoid this problem, we rotated the sample which is mounted on a rotating sample holder and maintained herewith the geometrical setup between scan direction and cantilever. The accuracy of a 90 ° rotation is about 0.5 mum which is in the range of the scanner and can be compensated by the piezo to locate the distinctive geometry of the original frame.
  • 10
    • 84927875055 scopus 로고    scopus 로고
    • This approach does not explicitly consider the molecular attractors of excitation of the sample. However, under the circumstances of self-oscillation of the system [M prime (vs) < 0], the sample molecular inhomogeneity can be simulated.

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