Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 27th March 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 7, 2010
Previous Article Next Article

Characterization of adhesion phenomena and contact of surfaces by soft colloidal probe AFM

Author affiliations

Abstract

We present a method based on colloidal probe atomic force microscopy (AFM) to measure adhesion energies and to study other contact phenomena of surfaces. The method employs an elastomeric colloidal probe, rendering the contact area between probe and sample much larger as compared to standard atomic force microscopy techniques. The technique allows us to determine the contact area via microinterferometry and measure the applied forces at the same time. The adhesion properties can then be accessed by using the Johnson–Kendall–Roberts (JKR) approach, i.e. measuring (a) the contact area as a function of applied load, and (b) the elastic parameters and the thermodynamic work of adhesion. We test this method in ambient conditions as well as in aqueous media on well-known surface chemistries, and can clearly characterize the contributions of capillary in air, hydration forces and hydrophobic interactions in water. This novel method provides a means to study the contact behavior of soft colloids and enhanced sensitivity for adhesion measurements.

Graphical abstract: Characterization of adhesion phenomena and contact of surfaces by soft colloidal probe AFM

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Nov 2009, accepted on 05 Jan 2010 and first published on 01 Feb 2010


Article type: Paper
DOI: 10.1039/B923540J
Citation: Soft Matter, 2010,6, 1432-1437

  •   Request permissions

    Characterization of adhesion phenomena and contact of surfaces by soft colloidal probe AFM

    J. Erath, S. Schmidt and A. Fery, Soft Matter, 2010, 6, 1432
    DOI: 10.1039/B923540J

Search articles by author

Spotlight

Advertisements