Surface modification using accelerated electrons: fast, gentle, precise, stable and durable

Wetting properties of functionalized surfaces with various liquids © Fraunhofer FEP, Picture in printable resolution: www.fep.fraunhofer.de/press

Surfaces must satisfy a wide range of requirements: they need to be decorative, and even contribute substantially to hygiene. They also play a large role in biomedicine.

There are numerous processes for functionalizing surfaces, depending on the application. Many are already well established and others are still under development by scientists throughout the world. Scientists at Fraunhofer FEP have already been working for a considerable time on functionalizing surfaces for the medical technology field.

In addition to coating technologies, accelerated low-energy electrons are also employed for this purpose. The surface is selectively treated with these electrons in order to achieve suitable properties. Besides antibacterial effects, “self-cleaning” surfaces can also be created in this way.

Electron beam treatment can result in a modification of the wetting characteristics for the surface (surface hydrophilicity), for example. In this way, the interaction of the surface with the environment can be selectively influenced. Human cells attach better, while bacteria in turn are rejected.

The order of magnitude of the dimensions for which this modification was able to be carried out is particularly noteworthy. Finely masking of samples with a lattice structure produced alternate hydrophilic (good wetting) and hydrophobic (poor wetting) surface areas with 100 μm separations. These very fine features characterized by differing surface energies are suited to lab-on-a-chip systems, for example, or for individualized growth patterns.

Gaby Gotzmann, head of hygienization, sterilization, and biofunctionalization at Fraunhofer FEP, explains: “While conventional processes often produce only temporary effects on surfaces, treatment with accelerated electrons leads to stable surfaces over a longer period. On suitable surfaces, the relevant areas can be treated very precisely, achieving penetration depths of even microns.”

Functionalization by means of electron beam was achieved rapidly. The challenge, however, lay in investigating the fundamental mechanisms of the effects in order to be able to reliably produce the results in the future. How the functionalization can be influenced by process parameters, needed to be explored. To accomplish this, comprehensive parametric studies were carried out by varying specific process parameters like atmosphere and incident energy, as well as in vitro cell tests that finally confirmed these insights.

The scientists are now able to set up a precise surface treatment procedure using electron beams for numerous surface applications in medical engineering and are seeking industrial partners for jointly producing functionalized surfaces.

Fraunhofer FEP at the 13th annual ThGOT 2018:

Exhibition booth

Conference presentation:
– „Langlebige Implantate – Herausforderungen an die Implantat-Knochenschnittstelle“
Gaby Gotzmann, 15.03.2018, 4:20 p.m.
– „Piezoelektrische AlN- und AlScN-Schichten für die energieautarke Sensorik“
Hagen Bartzsch, 13.03.2018, 1:50 p.m.

Poster:
– Electron beam curing of elastomers for 3D printing of biocompatible medical products
– Elektronenstrahlbasierte Fixierung von organischen Stoffen an medizintechnische Oberflächen

Press contact:

Mrs. Annett Arnold

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP
Phone +49 351 2586 333 | presse@fep.fraunhofer.de
Winterbergstraße 28 | 01277 Dresden | Germany | www.fep.fraunhofer.de

http://s.fhg.de/TqM

Media Contact

Silvena Ilieva Fraunhofer-Institut für Organische Elektronik, Elektronenstrahl- und Plasmatechnik FEP

Alle Nachrichten aus der Kategorie: Life Sciences

Articles and reports from the Life Sciences area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Zurück zur Startseite

Kommentare (0)

Schreib Kommentar

Neueste Beiträge

Cyanobacteria: Small Candidates …

… as Great Hopes for Medicine and Biotechnology In the coming years, scientists at the Chair of Technical Biochemistry at TU Dresden will work on the genomic investigation of previously…

Do the twist: Making two-dimensional quantum materials using curved surfaces

Scientists at the University of Wisconsin-Madison have discovered a way to control the growth of twisting, microscopic spirals of materials just one atom thick. The continuously twisting stacks of two-dimensional…

Big-hearted corvids

Social life as a driving factor of birds’ generosity. Ravens, crows, magpies and their relatives are known for their exceptional intelligence, which allows them to solve complex problems, use tools…

By continuing to use the site, you agree to the use of cookies. more information

The cookie settings on this website are set to "allow cookies" to give you the best browsing experience possible. If you continue to use this website without changing your cookie settings or you click "Accept" below then you are consenting to this.

Close