Saliva-coated titanium biosensor detects specific bacterial adhesion and bactericide caused mass loading upon cell death.

Bacteria adhering to implanted medical devices can cause invasive microbial infections, of e.g. skin, lung or blood.

Modeling of light scattering in different regimes of surface roughness.

The light scattering of rough metallic surfaces with roughness levels ranging from a few to several hundred nanometers is modeled and compared to experimental data. Different modeling approaches such as the classical Rayleigh-Rice vector perturbation theory and the new Generalized Harvey-Shack theory are used and critically assessed with respect to ranges of validity, accuracy, and practicability. Based on theoretical calculations and comparisons with Rigorous Coupled Wave Analysis for sinusoidal phase gratings, it is demonstrated that the approximate scatter models yield surprisingly accurate results and at the same time provide insight into light scattering phenomena.

Definition of roughness structures for superhydrophobic and hydrophilic optical coatings on glass.

With specific modeling, measurement, and analysis procedures, it is possible to predict, define, and control roughness structures for tailored wetting properties of optical coatings. Examples are given for superhydrophobic and hydrophilic sol-gel layers on glass substrate.