In Situ Spectroscopy

Rapid developments in the field of material sciences and biofunctional surfaces have inspired one innovation after the other, for example, in sensor technology and optical applications. However, improved methods of characterising the properties of materials are required to research these new, often functional materials and to deploy them in a sensible manner. Researching and refining such methods is the remit of the In Situ Spectroscopy group.

The group is concerned with functional materials, such as metamaterials and hybrid materials: materials with artificially created microstructures and nanostructures whose optical properties and adsorption characteristics have been adapted to the application in question. One of the group's core competences is in-situ investigations at solid-liquid interfaces. Such interfaces are key factors for liquid sensors that are used, for example, to detect specific molecules in liquids. These analyses enable the work group to examine in detail how the surface of an organic or biofunctional film in a sensor changes when it comes into contact with substances, and how this influences the properties of the surface. The group primarily uses infrared ellipsometry and spectroscopy for this purpose. Together with optical models and simulation calculations, the measurements provide direct access to the optical and structural properties of the materials.  

Current Publications

Brilliant mid-infrared ellipsometry and polarimetry of thin films: Toward laboratory applications with laser based techniques

Journal of Vacuum Science & Technology B, Vol. 37, Nr. 37, 060801, , P. 060801
Type: Journal article

Hyperspectral Infrared Laser Polarimetry for Single-Shot Phase–Amplitude Imaging of Thin Films

Optics Letters, Vol. 44, Nr. 19, , P. 4893–4896
Type: Journal article

Gradient metal nanoislands as a unified surface enhanced Raman scattering and surface enhanced infrared absorption platform for analytics

Analyst, Vol. 144, Nr. 17, , P. 5271–5276
Type: Journal article

Sub-second infrared broadband-laser single-shot phase-amplitude polarimetry of thin films

Optics Letters, Vol. 44, Nr. 17, , P. 4387–4390
Type: Journal article

Surface Functionalization toward Biosensing via Free-Standing Si-OH Bonds on Nonoxidized Silicon Surfaces

ACS Applied Materials & Interfaces, Vol. 11, Nr. 34, , P. 31434–31440
Type: Journal article

Temperature dependent diffusion of DMSO in CH3NH3PbI3 precursor films during layer formation and impact on solar cells

ACS Applied Energy Materials, Vol. 2019, Nr. 27, , P. 5116
Type: Journal article