Nanoadhesion on rigid methyl-terminated biphenyl thiol monolayers: A high-rate dynamic force spectroscopy study

Hubert Gojzewski; Michael Kappl; Gunnar Kircher; Wojciech Koczorowski; Hans Jürgen Butt; Arkadiusz Ptak

doi:10.1002/cphc.201200877

Nanoadhesion on rigid methyl-terminated biphenyl thiol monolayers: A high-rate dynamic force spectroscopy study

Hubert Gojzewski, Michael Kappl, Gunnar Kircher, Wojciech Koczorowski, Hans Jürgen Butt, Arkadiusz Ptak^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

4 Citations (Scopus)

Abstract

Nanoadhesion on a self-assembled monolayer of 4-methyl-4′- mercaptobiphenyl is measured using a modified atomic force microscope. The dependence of the adhesion force on the loading rate is analyzed with the Dudko-Hummer-Szabo model, and the kinetic and interaction potential parameters for a single terminal group are extracted. The energy and location of the activation barrier suggest that the adhesion is dominated by van der Waals dispersion forces. The humidity effect on the nanoadhesion is also studied. The results are compared with previously measured values for methyl-terminated alkane thiols and the influence of the thiol rigidity on the adhesion force is discussed.

Original language	English
Pages (from-to)	543-549
Number of pages	7
Journal	ChemPhysChem
Volume	14
Issue number	3
DOIs	https://doi.org/10.1002/cphc.201200877
Publication status	Published - 25 Feb 2013
Externally published	Yes

Keywords

Adhesion
Force spectroscopy
Humidity
Self-assembled monolayers (SAMs)
Thiols

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10.1002/cphc.201200877

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abstract = "Nanoadhesion on a self-assembled monolayer of 4-methyl-4′- mercaptobiphenyl is measured using a modified atomic force microscope. The dependence of the adhesion force on the loading rate is analyzed with the Dudko-Hummer-Szabo model, and the kinetic and interaction potential parameters for a single terminal group are extracted. The energy and location of the activation barrier suggest that the adhesion is dominated by van der Waals dispersion forces. The humidity effect on the nanoadhesion is also studied. The results are compared with previously measured values for methyl-terminated alkane thiols and the influence of the thiol rigidity on the adhesion force is discussed.",

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AU - Butt, Hans Jürgen

AU - Ptak, Arkadiusz

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AB - Nanoadhesion on a self-assembled monolayer of 4-methyl-4′- mercaptobiphenyl is measured using a modified atomic force microscope. The dependence of the adhesion force on the loading rate is analyzed with the Dudko-Hummer-Szabo model, and the kinetic and interaction potential parameters for a single terminal group are extracted. The energy and location of the activation barrier suggest that the adhesion is dominated by van der Waals dispersion forces. The humidity effect on the nanoadhesion is also studied. The results are compared with previously measured values for methyl-terminated alkane thiols and the influence of the thiol rigidity on the adhesion force is discussed.

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