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Fraunhofer Nanotechnology Alliance
 

Nanoparticle Technologies
Polystyrene nanoparticles - © Fraunhofer ICT-IMM
Fig.: Polystyrene nanoparticles
© Fraunhofer ICT-IMM
  The fabrication of Micro- and Nanocolloids with engineered interface for specific applications as well as the development and synthesis of intelligent polymer-based particles are one area of expertise. Particles can be made from a variety of synthetic and natural monomers/polymers either directly through chemical reactions or through precipitation of preformed polymers using manufacturing technologies such as heterophase polymerization, membrane emulsification, emulsification using micro mixers and microfluidic devices. The particles with a size range between 20 nm and 10 µm offer controlled physicochemical properties such as: size, morphology, shape, chemical composition, surface functionalization, high efficacy of hydrophilic and hydrophobic materials encapsulation.
 
Another focus is on analyzing nanoparticles of different materials under various conditions, i.e. as colloids in organic solvents, aqueous solutions, physiological conditions, or embedded in solid matrices. Depending on the particle material and surrounding medium, a variety of techniques are applied including electron microscopy (SEM, TEM, cryo-TEM) or optical methods (dynamic light scattering, spectroscopy). In addition, we use atomic force microscopy, field flow fractionation, size exclusion chromatography and analytical centrifugation to characterize nanoparticles. Furthermore we develop new techniques tailored to specific characterization needs.
     
In the area of bio-nano-interfaces we focus on interfacial reactions between synthetic materials and device components of organic or inorganic nature and biological systems. A particular emphasis is placed on plasma assisted process technologies and their application in surface design. Coatings are of great importance for example for the regulation of the interactions of soft or hard tissue and titanium implants. Another project deals with the interface design and strategies to impart antimicrobial properties to synthetic polymeric materials suitable for wound healing and the detection and signaling of bacterial infection in wound healing applications.

IMM Flyer "Nanoparticle Technologies" (1.31 MB)

IMM Flyer "Continous sysnthesis of nanoparticles at high temperatures" (670 KB)

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