Multilayer superparamagnetic-plasmonic nanocomposites

G.A. Sotiriou, C.O. Blattmann, S.E. Pratsinis
Particle Technology Laboratory, CH

Keywords: superparamagnetic, plasmonic, nanocomposites

Summary:

Assemblying of devices with nanoparticles is a new frontier for integration of nanomaterials into products [1]. Multi-layer polymer nanocomposite films with multifunctional filler particles were made at high filler contents at controlled filler particle size and crystallinity. These films exhibit the characteristic properties of each component, such as magnetic and plasmonic [2]. The filler particles are homogeneously dispersed within the polymer films, allowing for uniform properties throughout the film. Such structures are advantageous for several applications that require select functionalities such as optical filters, biosensors, luminescent materials. Here, the supermagnetic performance of these polymer composites is demonstrated. Furthermore, free-standing microstructures (e.g. cantilevers) have been made by depositing the polymer nanocomposite films on a sacrificial layer. The filler film stays intact after the addition of the polymer, resulting in high-filler-fraction polymer nanocomposites with homogeneous distribution. Such structures are attractive for integration in micro- and nano-fabrication techniques, for example the formation of superparamagnetic cantilevers [3]. [1] S.E. Pratsinis, Aerosol-based Technologies in Nanoscale Manufacturing: from Functional Materials to Devices through Core Chemical Engineering, AIChE J., 56, 3028-3035 (2010). [2] Sotiriou, G. A., Hirt, A. M., Lozach, P. Y., Teleki, A., Krumeich, F. & Pratsinis, S. E. Hybrid, silica-coated, Janus-like plasmonic-magnetic nanoparticles. Chem. Mater. 23, 1985-1992 (2011). [3] Suter, M., Ergeneman, O., Zürcher, J., Moitzi, C., Pané, S., Rudin, T., Pratsinis, S. E., Nelson, B. J. & Hierold, C. A photopatternable superparamagnetic nanocomposite: Material characterization and fabrication of microstructures. Sens. Act. B-Chem. 156, 433-443 (2011).