Dissipation and oscillatory solvation forces in confined liquids studied by small-amplitude atomic force spectroscopy

Nanotechnology
Sissi de BeerFrieder Mugele

Abstract

We determine conservative and dissipative tip-sample interaction forces from the amplitude and phase response of acoustically driven atomic force microscope (AFM) cantilevers using a non-polar model fluid (octamethylcyclotetrasiloxane, which displays strong molecular layering) and atomically flat surfaces of highly ordered pyrolytic graphite. Taking into account the base motion and the frequency-dependent added mass and hydrodynamic damping on the AFM cantilever, we develop a reliable force inversion procedure that allows for extracting tip-sample interaction forces for a wide range of drive frequencies. We systematically eliminate the effect of finite drive amplitudes. Dissipative tip-sample forces are consistent with the bulk viscosity down to a thickness of 2-3 nm. Dissipation measurements far below resonance, which we argue to be the most reliable, indicate the presence of peaks in the damping, corresponding to an enhanced 'effective' viscosity, upon expelling the last and second-last molecular layer.

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Citations

Feb 4, 2012·The Review of Scientific Instruments·Daniel KiracofeArvind Raman
Sep 21, 2013·Chemical Reviews·Jeong Young Park, Miquel Salmeron
Aug 29, 2013·Langmuir : the ACS Journal of Surfaces and Colloids·Fredy R Zypman, Steven J Eppell
Jul 9, 2016·The Journal of Chemical Physics·Rong-Guang Xu, Yongsheng Leng
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Nov 14, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Shah H Khan, Peter M Hoffmann
Mar 4, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Sissi de BeerFrieder Mugele
Jun 29, 2013·Nanotechnology·Chih-Wen YangIng-Shouh Hwang
Nov 10, 2011·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Alois Würger
Oct 11, 2014·Nanotechnology·Zehra ParlakStefan Zauscher
Oct 30, 2020·Nanotechnology·Shatruhan Singh RajputShivprasad Patil
Jul 16, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Fei LiuFrieder Mugele
Sep 17, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Kislon Voïtchovsky
Jun 19, 2021·Nanotechnology·Shatruhan Singh RajputShivprasad Patil
Nov 10, 2017·The Journal of Physical Chemistry Letters·Daniel Martin-Jimenez, Ricardo Garcia
Oct 5, 2017·The Journal of Physical Chemistry. B·F LiuD van den Ende
Apr 12, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Simone R van LinFrieder Mugele

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