ET Aqueous Colloids Research Group
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Techniques and available methods Materials synthesis: synthesis of nanoparticles: coprecipitation of Fe(II) and Fe(III) ions in alkaline medium, YIG (yttrium-iron oxide garnet) self-combustion of ruby jelly, Stöeber method, hydrothermal ageing, etc. Equipments for preparation: water purification system, mixers, heating baskets, thermal baths, supercentrifuge (Sorwall), driers, ovens, furnaces (up to 1300oC), freeze-drier, high energy ultrasonication and colloidal mill (vibrating agate mill), pH-meter, conductivity meter. Surface modification: design and implementation of organic shell on core for example magnetite nanoparticles by adsorption of surfactants, polyacids, natural and synthetised polyelectrolytes/polymers to stabilize and functionalize them for further functionalization (e.g. by anti-body) Characterization: of interfacial equilibria and colloidal interactions mainly pH and ionic strength dependent properties tuned by surface modifying agents pH-dependent charge state of particles and molecules (Potentiometric acid-base titration system) Particle size and size distribution, coagulatoin kinetics by dynamic light scattering (NanoZS and Zetasizer4)  Charge state of particles by laser Doppler electrophoresis (NanoZS) 2-D interactions in floating films by Langmuir-balance (MicroTroughXL) Flow properties of materials, flow curves, creep tests, oscillation measurements, etc. (RS150 rheometer) Magnetic measurements, particle separation by size using various magnetic field strengths (Hall-probe, Separator) UV-visible optical properties of materials (dioda array spectrophotometer) Magnetic hyperthermia simulation (Magnetherm) Advanced methods (XRD, TEM, SEM) for further characterization of nanoparticles are available at our University.
Materials synthesis Surface modification Characterization


ET Aqueous Colloids

Research Group

HU-6720 Szeged Aradi Vt. tere 1. E-mail: tombacz@ Phone: +36-62/544212