Fraunhofer Institute for Interfacial Engineering and Biotechnology
Plasma processing is nowadays one of the most important tools in thin film and surface treatment technologies, and thus plays a key role in manufacturing of many innovative products. For this reason, applications of plasma in surface technology belong to main research interests of the Fraunhofer IGB. The used plasmas are low temperature, low-to-medium pressure ones, enabling a gentle and controlled surface processing.
This way we are able to etch surfaces, e.g. to clean them, or to graft new chemical functionalities onto the surface. It is also possible to polymerize a thin film onto the surface, providing such functions as as scratch-resistance, dirt-repellency, or corrosion protection. By controlling the gas composition, power and other process parameters, a broad spectrum of chemical, physical and biological surface modifications is attainable.
Fields of research
- Adhesion improvement by plasma treatment
- Plasma technology for restoring historical papers
- Microplasmas for modifying narrow-lumen structures made of thermolabile materials
- Plasma sterilization for thermolabile materials
- Plasma ultracleaning of metal surfaces
- Glow discharge treatments for the modification of technical textiles
Good to know
- Plasma impact onto surfaces
- Advantages of plasma technologies, and properties of plasma produced films
- Cost-efficiency of plasma processes
- Environmental aspects of plasma technology
- Materials and geometries suitable for plasma treatment
- Innofunk – The barrier effect and enhanced emptying behavior of plastic containers
- Nanodyn: Anti-icing coating
- Improvement of copper adhesion on polyimide films
- WaterPlasma: Water decontamination technology for the removal of recalcitrant xenobiotic compounds based on atmospheric plasma technology
- Switchable biomaterial surfaces: nanostructured anatase-implant surfaces with dynamic anti-fouling properties
At the Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, surfaces are first of all fully characterized with the aim of selectively modifying their properties, and in a second step, they are functionalized using various modification and coating technologies.
- Process development for the plasma modification of surfaces (powders, fibers, surfaces and shaped bodies)
- Layer development
- Scratch protection, abrasion protection layers
- Production of adhesive or dehesive agents
- Corrosion protection layers
- Barrier layers (e.g. impervious to oxygen and water vapor)
- Functionalization of surfaces
- Biofunctionalization, chemical functionalization
- Development of plasma cleaning processes
- Development of plasma sterilization processes
- Surface and layer characterization
- Geometry, morphology, roughness
- Chemical composition, biological properties
- Interfacial energy, adhesion
- Development of processes and plants
- Upscaling of the laboratory process
- Consultations, evaluation und feasibility studies to establish plasma methods as a technological alternative
- Patent and literature research on subjects relating to plasma technology
We have at our disposal a series of plants to carry out and further develop various plasma-chemical and -physical processes mainly in the low-pressure and subatmospheric pressure plasmas (0.01 to 300 mbar). If appropriate, we also work with plasma processes at atmospheric pressure. Besides commercially available plants (some of them modified), we have plants of our own design. For special specimen geometries and process requirements, we can build suitable reactors and combine them with existing plant components (process gas, flow and pressure controls, vacuum components, high-frequency generators) to make laboratory or test facility plants.
- Vacuum surface treatment equipment
- Plasma diagnostics: Insights into what happens physically and chemically
- Surface analytics
- M. Haupt, J. Barz, U. Vohrer, H. Hilgers, Ch. Oehr, Fluorocarbon nano coatings for specific surface functionalization, NanoS 2006, 1, 23.
- J. Barz, M. Haupt, U. Vohrer, H. Hilgers, Ch. Oehr, Ultrathin carbon-fluorine film processing, Surface & Coatings Technology 2005, 453.
- M. Haupt, J. Barz, Ch. Oehr, Creation and Recombination of Free Radicals in Fluorocarbon Plasma Polymers: An Electron Spin Resonance Study, Plasma Processes and Polymers 2008, 33.
- U. Vohrer, Plasma Funktionalisation of Technical Textiles for Biomedical Applications, NanoS 2007, 18.
- J. Barz, M. Haupt,. K. Pusch, M. Weimer, Ch. Oehr, Influence of Fluorocarbon Plasma Polymer Films on the Growth of Primary Human Fibroblasts, Plasma Process and Polymers 2006, 540.
- C. Köhler, Th. Frauenheim, Molecular dynamics simulations of CFx (x=2,3) molecules at Si3N4 and SiO2 surfaces, Surf. Sci., 600:453, 2006.
- J. M. Knaup, C. Köhler, M. Hoffmann, Th. Frauenheim, Ab initio simulation of interface reactions as a foundation of understanding polymorphism, Eur. Phys. J. Special Topics, 149:127, 2007.