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Papastavrou, Georg ; Akari, S.:
Interaction forces between OH-groups in different solvents as observed by scanning force microscopy.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects.
Bd. 164
(2000)
Heft 2-3
.
- S. 175-181.
ISSN 0927-7757
DOI: https://doi.org/10.1016/S0927-7757(99)00403-3
Abstract
Interactions between hydroxyl-terminated surfaces were measured on local scale by performing force-displacement measurements using a scanning force microscope (SFM). For this purpose a SFM-tip was modified by self assembly techniques employing alkanethiolates omega-substituted with OH-groups. Gold surfaces were functionalized employing the same method. Interaction forces between the OH-terminated tip and samples terminated by OH- or CH3-groups were examined in hexadecane and deionized water. As in water OH/OH-interaction forces have been found to be relatively small, in hexadecane larger forces clearly could be detected. Further investigations by a systematic variation of the solvents have been carried out to clarify the origin of the observed strong adhesion forces between OH-groups in unpolar solvents. (C) 2000 Elsevier Science B.V. All rights reserved.