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Theoretical model and experimental study on environmental dissipation mechanism of tapping mode atomic force microscope
Author(s) -
Wei Zheng,
Liu Jing,
Wei Ruihua,
Peng Anjie
Publication year - 2021
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 - 10.1111/jmi.13035
Subject(s) - dissipation , mechanism (biology) , mechanics , viscous damping , phase (matter) , atomic force microscopy , tapping , materials science , mode (computer interface) , cantilever , physics , acoustics , nanotechnology , vibration , thermodynamics , composite material , quantum mechanics , computer science , operating system
The phase information reflects the energy dissipation of the probe and sample interactions in tapping mode atomic force microscopes (TM AFMs). In this paper, we use the method of tune test in TM AFM to study the contribution of external environment to energy dissipation by changing the probe position and ambient humidity. Finally, the theoretical and experimental quality factors of air viscous damping, squeeze film damping and liquid bridge force are obtained to characterise energy dissipation. The analytically predicted values of the model established on squeeze film damping, viscous damping and liquid bridge force comparing to the experimental results in this paper is rational. And the comparative analysis results show that the main mechanism of energy dissipation is different at different probe positions and different relative humidness. This result is of great significance for understanding the mechanism of phase imaging experimentally and theoretically.