Numerical Study of Hydrodynamic Forces for AFM Operations in Liquid
Joint Authors
Berthold, Tobias
Benstetter, Guenther
Frammelsberger, Werner
Rodríguez, Rosana
Nafría, Montserrat
Source
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-07-26
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Information Technology and Computer Science
Abstract EN
For advanced atomic force microscopy (AFM) investigation of chemical surface modifications or very soft organic sample surfaces, the AFM probe tip needs to be operated in a liquid environment because any attractive or repulsive forces influenced by the measurement environment could obscure molecular forces.
Due to fluid properties, the mechanical behavior of the AFM cantilever is influenced by the hydrodynamic drag force due to viscous friction with the liquid.
This study provides a numerical model based on computational fluid dynamics (CFD) and investigates the hydrodynamic drag forces for different cantilever geometries and varying fluid conditions for Peakforce Tapping (PFT) in liquids.
The developed model was verified by comparing the predicted values with published results of other researchers and the findings confirmed that drag force dependence on tip speed is essentially linear in nature.
We observed that triangular cantilever geometry provides significant lower drag forces than rectangular geometry and that short cantilever offers reduced flow resistance.
The influence of different liquids such as ultrapure water or an ethanol-water mixture as well as a temperature induced variation of the drag force could be demonstrated.
The acting forces are lowest in ultrapure water, whereas with increasing ethanol concentrations the drag forces increase.
American Psychological Association (APA)
Berthold, Tobias& Benstetter, Guenther& Frammelsberger, Werner& Rodríguez, Rosana& Nafría, Montserrat. 2017. Numerical Study of Hydrodynamic Forces for AFM Operations in Liquid. Scanning،Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1197945
Modern Language Association (MLA)
Berthold, Tobias…[et al.]. Numerical Study of Hydrodynamic Forces for AFM Operations in Liquid. Scanning No. 2017 (2017), pp.1-12.
https://search.emarefa.net/detail/BIM-1197945
American Medical Association (AMA)
Berthold, Tobias& Benstetter, Guenther& Frammelsberger, Werner& Rodríguez, Rosana& Nafría, Montserrat. Numerical Study of Hydrodynamic Forces for AFM Operations in Liquid. Scanning. 2017. Vol. 2017, no. 2017, pp.1-12.
https://search.emarefa.net/detail/BIM-1197945
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1197945