Interactions between hydrophilic and hydrophobic surfaces on microscopic scale and the influence of air bubbles as observed by scanning force microscopy in aqueous and alcoholic mediums

Title data

Papastavrou, Georg ; Akari, S. ; Möhwald, Helmuth:
Interactions between hydrophilic and hydrophobic surfaces on microscopic scale and the influence of air bubbles as observed by scanning force microscopy in aqueous and alcoholic mediums.
In: Europhysics Letters. Vol. 52 (2000) Issue 5 . - pp. 551-556.
ISSN 0295-5075
DOI: https://doi.org/10.1209/epl/i2000-00472-2

Official URL:

Abstract in another language

In the present study interactions between hydrophilic and hydrophobic surfaces were studied on a microscopic scale by using scanning force microscopy (SFM). Gold-coated surfaces were chemically modified to be hydrophobic or hydrophilic by self-assembly monolayers based on thiols with different end-groups (COOH, CH3). The adhesion forces between hydrophilic tips and hydrophilic or hydrophobic surfaces were measured in water/ethanol mixtures by recording force-distance curves. The measurements in water/ethanol mixtures short an increase of the adhesion forces due to the increase of the water content. The observed interactions are of short range within few nm. In some force-distance curves with hydrophobic tips a stepping in the retracting part was observed which could be attributed to air bubbles in the vicinity of the tip-surface junction.

Further data

Item Type:	Article in a journal
Refereed:	Yes
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Physical Chemistry II - Univ.-Prof. Dr. Andreas Fery Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Physical Chemistry II Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Result of work at the UBT:	No
DDC Subjects:	500 Science > 540 Chemistry
Date Deposited:	13 Sep 2017 09:26
Last Modified:	13 Sep 2017 09:26
URI:	https://eref.uni-bayreuth.de/id/eprint/39595