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Separating different contributions to the shear force in near‐field microscopy
Author(s) -
Leuschner M.,
Schüttler M.,
Giessen H.
Publication year - 2001
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1046/j.1365-2818.2001.00827.x
Subject(s) - dissipative system , graphite , adiabatic process , shear (geology) , amplitude , shear force , adiabatic shear band , materials science , condensed matter physics , vibration , optics , mechanics , physics , classical mechanics , thermodynamics , composite material , quantum mechanics
The shear force between a gold and a graphite sample and an approaching near‐field optical probe using tuning fork detection is studied in detail. The adiabatic and dissipative contributions are clearly distinguished by monitoring the amplitude as well as the phase of the tip vibration when approaching the surfaces. Their relative strengths vary differently but characteristically with the distance. The interaction starts in case of graphite at a much larger distance. The adiabatic contribution is larger in the case of gold, whereas graphite shows mostly dissipative interaction. Measurements at various temperatures are performed using a gold sample, showing a dependence of the shear force on the temperature.