Surface modifications and characterization


Ellipsometry is a non-destructive optical technique using polarised light to probe the physical thickness of films and the optical properties of thin layers.

Atomic Force Microscopy (AFM)

AFM provides information about the roughness of a sample.

Contact Angle Measurement

By determining the contact angle of waterdrops on surfaces it is possible to otain information about the hydrophilic or hydrophobic properties of the interface.

Surface Modification

Chemical modification of surfaces includes immobilisation of biopolymers. Immobilisation prevents any unwelcome non-specific binding of proteins and other biomolecules, and also prepares the surface for immobilisation of ligands or receptors.


Covalent binding of biomolecules to surfaces is possible using photochemical methods. Therefore, so-called photolinkers are used that can be fixed to biomolecules. Photo reaction is triggered by UV radiation.