Hirt A.M., Sotiriou G.A.: Kidambi P.R., Teleki A., (2014), Effect of Size, Composition and Morphology on Magnetic Performance: First Order Reversal Curves Evaluation of Iron Oxide Nanoparticles, in J. Appl. Phys.
, 115, 044314.
Sotiriou G.A. Starsich F. Dasargyri A. Wurnig M.C. Krumeich F. Boss A. Leroux J-C. Pratsinis S.E. (2014), Photothermal Killing of Cancer Cells by the Controlled Plasmonic Coupling of Silica-coated Au/Fe2O3 Nanoaggregates, in Adv. Funct. Mater.
, 24, 2818-2827.
Sotiriou G. A. (2013), Biomedical Applications of Multifunctional Plasmonic Nanoparticles, in Wiley Interdisciplinary Reviews-Nanomedicine and Nanobiotechnology
, 5, 19-30.
Sotiriou G. A., Blattmann C. O., Pratsinis S. E. (2013), Flexible, Multifunctional, Magnetically Actuated Nanocomposite Films, in Advanced Functional Materials
, 23(1), 34-41.
Gass S., Cohen J., Pyrgiotakis G., Sotiriou G.A., Pratsinis S.E., Demokritou P., (2013), Safer Formulation Concept for Flame-Generated Engineered Nanomaterials, in ACS Sustainable Chem. Eng.
, 1, 843-857.
Sotiriou G.A., Visbal-Onufrak M.A., Teleki A., Juan E.J., Hirt A.M., Pratsinis S.E., RinaldiC (2013), Thermal Energy Dissipation by SiO2-coated Plasmonic-Superparamagnetic Nanoparticles in Alternating Magnetic Fields, in Chem. Mater.
, 25, 4603-4612.
Sotiriou G. A., Diaz E., Long M. S., Godleski J., Brain J., Pratsinis S. E., Demokritou P. (2012), A Novel Platform for Pulmonary and Cardiovascular Toxicological Characterization of Inhaled Engineered Nanomaterials, in Nanotoxicology
, 6(6), 680-690.
Deligiannakis Y., Sotiriou G. A., Pratsinis S. E. (2012), Antioxidant and Antiradical SiO2 Nanoparticles Covalently Functionalized with Gallic Acid, in ACS Applied Materials & Interfaces
, 4, 6609-6617.
Bubenhofer S. B., Schumacher C. M., Koehler F. M., Luechinger N. A., Sotiriou G. A., Grass R. N., Stark W. J. (2012), Electrical Resistivity of Assembled Transparent Inorganic Oxide Nanoparticle Thin Layers: Influence of Silica, Insulating Impurities and Surfactant Layer Thickness, in ACS Applied Materials & Interfaces
, 4(5), 2664-2671.
Tsai C. S. J., Echevarria-Vega M. E., Sotiriou G. A., Santeufemio C., Schmidt D., Demokritou P., Ellenbecker M. (2012), Evaluation of Environmental Filtration Control of Engineered Nanoparticles using the Harvard Versatile Engineered Nanomaterial Generation System (VENGES), in Journal of Nanoparticle Research
, 14(5), 812.
Sotiriou G. A., Schneider M., Pratsinis S. E. (2012), Green, Silica-coated Monoclinic Y2O3:Tb3+ Nanophosphors: Flame Synthesis and Characterization, in Journal of Physical Chemistry C
, 116(7), 4493-4499.
Sotiriou G. A., Franco D., Poulikakos D., Ferrari A. (2012), Optically Stable Biocompatible Flame-Made SiO2-Coated Y2O3:Tb3+ Nanophosphors for Cell Imaging, in ACS Nano
, 6(5), 3888-3897.
Sotiriou G. A., Meyer A., Knijnenburg J. T. N., Panke S., Pratsinis S. E. (2012), Quantifying the Origin of Released Ag+ ions from Nanosilver, in Langmuir
, 28(45), 15929-15929.
Sotiriou G. A., Schneider M., Pratsinis S. E. (2011), Color-Tunable Nanophosphors by Codoping Flame-Made Y2O3 with Tb and Eu, in Journal of Physical Chemistry C
, 115(4), 1084-1089.
Dahlin A. B., Sannomiya T., Zahn R., Sotiriou G. A., Voros J. (2011), Electrochemical Crystallization of Plasmonic Nanostructures, in Nano Letters
, 11(3), 1337-1343.
Sotiriou G. A., Pratsinis S. E. (2011), Engineering Nanosilver as an Antibacterial, Biosensor and Bioimaging Material, in Current Opinion in Chemical Engineering
, 1(1), 3-10.
Sotiriou G. A., Hirt A. M., Lozach P. Y., Teleki A., Krumeich F., Pratsinis S. E. (2011), Hybrid Silica-coated, Janus-like Plasmonic-Magnetic Nanoparticles, in Chemistry of Materials
, 23(7), 1985-1992.
Sotiriou G. A., Teleki A., Camenzind A., Krumeich F., Meyer A., Panke S., Pratsinis S. E. (2011), Nanosilver on Nanostructured silica: Antibacterial Activity and Ag Surface Area, in Chemical Engineering Journal
, 170(2-3), 547-557.
Sotiriou G. A., Pratsinis S. E. (2010), Antibacterial Activity of Nanosilver Ions and Particles, in Environmental Science & Technology
, 44(14), 5649-5654.
Sotiriou G. A., Sannomiya T., Teleki A., Krumeich F., Voros J., Pratsinis S. E. (2010), Non-Toxic Dry-Coated Nanosilver for Plasmonic Biosensors, in Advanced Functional Materials
, 20(24), 4250-4257.
Pratsinis A., Hervella P., Leroux J-C., Pratsinis S. E., Sotiriou G. A., Toxicity of Silver Nanoparticles in Macrophages, in Small
There is growing interest in nanocomposites of sophisticated nanoparticles (multicomponent and even metal-ceramic) in polymers for their unique optical, electrical, magnetic and mechanical applications, to name a few. Nanocomposite properties are affected by the individual component properties as well as the dispersion of nanoparticles within the host matrix and the particle-polymer interface. As a result, understanding the relationship between nanocomposite properties and performance is essential in any of these applications.Here, nanoparticles with closely controlled characteristics (primary particle, aggregate and agglomerate sizes, phase and chemical composition and extent of agglomeration) will be used to make nanocomposites. The synthesis of such nanoparticles by scalable dry (aerosol) methods is a unique asset of our laboratory enabling a systematic investigation of the effect of filler (nanoparticle) characteristics on nanocomposite properties and performance. The focus is on synthesis agglomerates of primary and/or aggregate nanoparticles that can be easily dispersed in polymer matrices. Such nanoparticles will be made by flame spray pyrolysis (FSP) at high temperatures followed by rapid cooling to minimize, if not prevent, the formation of sinter necks between constituent primary nanoparticles of the product agglomerates following recent advances made in our laboratories regarding the interplay of coagulation and sintering during particle formation. With FSP, liquid precursors are spray combusted resulting in a broad range of multicomponent ceramic/metal nanoparticles using single or multi-nozzle configurations. Furthermore the potential of in-situ functionalization of such flame-made particles will be explored capitalizing on our recent achievement of in-situ coating of such particles with nanothin inorganic films by swirling vapor jets downstream of core nanoparticle formation. This will facilitate the interfacing of such particles into matrices before or after polymerization of the nanocomposites. The efficient incorporation of nanoparticles to the host matrix will be further investigated by systematically exploring the role of catalysts and surfactants along with that of mixing operation and devices (e.g. planetary mixers). Emphasis will be placed also on understanding the mixing of nanoparticles in polymers including their degree of agglomeration and its effect on nanocomposite properties (e.g. for mechanical: Young modulus and extent of elongation at break-up). A project target is the detailed investigation of the parameters which are essential to synthesis of sophisticated mixed-phase nanoparticles for process understanding and eventual scale-up capitalizing of our understanding of FSP synthesis of single component materials. The morphology of the produced nanoparticles will be characterized by an array of techniques such as x-ray diffraction, nitrogen adsorption, TEM imaging, spectroscopy analysis (Raman, FTIR, UV/vis) available in our and other ETH laboratories. The key goal of this project is to place nanocomposite synthesis on a firm scientific basis that may even contribute to development of novel applications (e.g. environmentally-friendly, non-leaching silver-containing anti-bacterial nanocomposites).Last but not least, this project will assist the education of two doctoral students in engineering specializing in nanoparticle processing and will allow Bachelor and Master students to gain knowledge in analytical methods. Research results will be presented in international conferences and will be submitted for publication in refereed journals.