N.C.S.R. "Demokritos"


Department of Materials Science

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Christos Trapalis

Researcher A

+30 210 6503343

Research Director, Head of Nanofunctional and Nanocomposite Materials Laboratory

Director of Research. From 2006 - now Head of “Laboratory of Nanofunctional and Nanocomposite Materials”, Institute of Materials Science, NCSR Demokritos. Associate Professor 2004-2007 Department of Products and Systems Design Engineering Aegean University, Ermoupolis, Syros. Research Officer 1996-2005 Sol-Gel Laboratory, IMS, NCSR “Demokritos”. Postdoctoral Fellow 1992-1995 Sol-Gel Laboratory, IMS, NCSR “Demokritos”. PhD Student in Chemistry 1987-1991 PhD - University of Chemical Technology and Metallurgy. BSc Student in Chemical Engineering 1979-1984 Higher Institute of Chemical Technology.

Research Interests:

• Synthesis of oxide, metallic, dense and hollow nanoparticles, thin films and coatings, with functional - photocatalytic, hydrophilic, antibacterial, magnetic and etc. properties.

•Synthesis of Graphene and Graphene Oxide by Chemical Oxidation of Graphite, MW expansion of expandable graphite. Graphene nanosacks by spray aerosol of Graphite Oxide.Functionalization of carbogenic nanostructures (Graphenes, carbon nanotubes, graphite oxide, conductive polymers).

• Development and modification of new chemistry based methods, for nanoparticles synthesis (sol-gel, hydrothermal treatment, pyrolytic methods etc).

• Study optical properties of nanomaterials including, electromagnetic radiation scattering and transmission phenomena from microwaves to optics.

Hydroxyapatite/titanium dioxide nanocomposites for controlled photocatalytic NO oxidation

Few Layer Graphenes Decorated with Silver Nanoparticles

Reduced graphene oxide/iron carbide nanocomposites for Supercapacitors

Selected journal publications

  • Bourlinos, A.B., Karakassides, M.A., Stathi, P., Deligiannakis, Y., Zboril, R., Dallas, P., Steriotis, T.A., Stubos A.K., Trapalis, C. (2010) Pyrolytic formation of a carbonaceous solid for heavy metal adsorption, Journal of Materials Science , 1-8.
  • Georgakilas V., Bourlinos A.B., Zboril R., Steriotis T.A., Theodore A., Dallas P., Stubos AK, Trapalis C. (2010) Organic Functionalisation of Graphenes, Chemical Communications 46, 1766-1768.
  • Mahmud, K., Mitsionis, A., Vaimakis, T., Kourkoumelis, N., Trapalis, C. (2010) The threonine effect on calcium phosphate preparation from a solution containing Ca/P = 1.33 molar ratio, Ceramics International 36, 1893 -1899.
  • Mitsionis, A.I., Vaimakis, T.C., Trapalis, C.C. (2010) The effect of citric acid on the sintering of calcium phosphate bioceramics, Ceramics International 15, 623-634.
  • Šojić, D., Despotović, V., Abramović, B., Todorova, N., Giannakopoulou, T., and Trapalis, C. (2010) Photocatalytic Degradation of Mecoprop and Clopyralid in Aqueous Suspensions of Nanostructured N-doped TiO2, Molecules 15, 2994-3009.
  • Belessi, V., Romanos, G., Boukos, N., Lambropoulou, D., Trapalis, C. (2009) Removal of Reactive Red 195 from aqueous solutions by adsorption on the surface of TiO2 nanoparticles, Journal of Hazardous Materials 170, 836-844.
  • Bourlinos, A.B., Georgakilas, V., Zboril, R., Steriotis, T.A.,. Stubos, A.K, Trapalis, C. (2009) Aqueous-phase exfoliation of graphite in the presence of polyvinylpyrrolidone for the production of water-soluble graphenes, Solid State Communications 149, 2172-2176.
  • Dobrescu G., Anastasescu M., Stoica M., Szekeres, A., Todorova, N., Trapalis, C., Gartner M. (2009) A fractal analysis of TiO2 sol-gel films treated under different atmospheres, J. Optoelectronics & Advanced Materials 11, 1359-1362.
  • Gartner, M., Anastasescu, C., Zaharescu, M., Enache, M., Dumitru, L., Stoica, T., Stoica, T.F., Trapalis, C. (2009) The simulation in the real conditions of antibacterial activity of TiO2(Fe) films with optimized morphology, Ceramic Engineering and Science Proceedings 29, 67-76.
  • Georgakilas, V., Dallas, P., Niarchos, D., Boukos, N., Trapalis, C. (2009) Polypyrrole/MWNT nanocomposites synthesized through interfacial polymerization, Synthetic Metals 159, 632-636 .
  • Giannakopoulou T., Todorova N., Osiceanu P., Lagoyannis A., Vaimakis, T., Trapalis, C. (2009) Description of TiO2 thin films treated in NH3 atmosphere by optical dispersion models, Thin Solid Films 517, 6694-6699.
  • Giannakopoulou, T., Niarchos, D., Trapalis, C. (2009) Experimental investigation of electric and magnetic responses in composites with dielectric resonator inclusions at microwave frequencies, Applied Physics Letters, 94, art. no.-242506.
  • Trapalis, C., Calderon-Moreno, J. M., Todorova, N., Teodorescu, V. S., Stoica, M., Nicolescu, M., Anastasescu, M., Gartner, M., Zaharescu, M. (2009) Nitridation and crystallization of titanium oxynitride by thermal treatment of TiO2-anatase films in NH3, J. of Optoelectronic Materials, 11, 1810-1814.
  • Trapalis, C., Todorova, N., Anastasescu, M., Anastasescu, C., Stoica, M., Gartner, M., Zaharescu, M., Stoica, T. (2009) Atomic force microscopy study of TiO2 sol–gel films thermally treated under NH3 atmosphere, Thin Solid Films 517, 6243-6247.
  • Vacaroiu , C., Enache, M., Gartner, M., Popescu G., Brezeanu, A., Giannakopoulou, T., Todorova, N., Trapalis, C. (2009) The effect of thermal treatment on antibacterial properties of nanostructured TiO2(N) films illuminated with visible light, World Journal of Microbiology & Biotechnology 25, 27-31.
  • Vitanov, P., Harizanova, A., Ivanova, T., Trapalis, C., Todorova, N. (2009) Sol-gel ZrO2 and ZrO2-Al2O3 nanocrystalline thin films on Si as high-k dielectrics, Materials Science and Engineering B: Solid-State Materials for Advanced Technology 165, 178-181 .
  • Georgakilas, V., Bourlinos, A., Gournis, D., Tsoufis, T., Trapalis, C., Mateo-Alonso, A., Prato, M. (2008) Multipurpose organically modified carbon nanotubes: From functionalization to nanotube composites, Journal of the American Chemical Society 130, 8733-8740.
  • Georgakilas, V., Bourlinos, A.B., Zboril, R., Trapalis, C. (2008) Synthesis, characterization and aspects of superhydrophobic functionalized carbon nanotubes, Chemistry of Materials 20, 2884-2886.
  • Giannakopoulou, T., Todorova, N., Vaimakis, T., Ladas, S., Trapalis, C. (2008) Study of fluorine-doped TiO2 sol-gel thin coatings, Journal of Solar Energy Engineering, Transactions of the ASME 130, 410071-410075.
  • M. Gartner, C. Trapalis, N. Todorova, T. Giannakopoulou, G. Dobrescu, M. Anastasescu, P. Osiceanu, A. Ghita, M. Enache, L. Dumitru, T. Stoica, M. Zaharescu, J.Y. Bae, S.H. Suh (2008) Doped Sol-Gel TiO2 Films for Biological Applications, Bull. Korean Chem. Soc. 29, 1038-1042.
  • M. Gartner, P. Osiceanu, M. Anastasescu, C. Trapalis (2008) Investigation on the nitrogen doping of multilayered, porous TiO2 thin films, Thin Solid Films 516, 8184-8189.
  • M. Ksibi, S. Rossignol, J. Tatibouët, C. Trapalis (2008) Synthesis and solid characterization of Nitrogen and sulfur-Doped TiO2 photocatalysts active under near Visible Light, Materials Letters 62, 26, 4204-4206.
  • Pomoni, K., Vomvas, A., Trapalis, Chr. (2008) Electrical conductivity and photoconductivity studies of TiO2 sol-gel thin films and the effect of N-doping, Journal of Non-Crystalline Solids 354, 4448-4457.
  • Pomoni, K., Vomvas, A., Trapalis, Chr. (2008) Dark conductivity and transient photoconductivity of nanocrystalline undoped and N-doped TiO2 sol-gel thin films, Thin Solid Films 516, 1271-1278.
  • Todorova, N., Giannakopoulou, T., Vaimakis, T., Trapalis, C. (2008) Structure tailoring of fluorine-doped TiO2 nanostructured powders, Materials Science and Engineering B: Solid-State Materials for Advanced Technology 152, 50-54.
  • Trapalis, C., Todorova, N., Giannakopoulou, T., Romanos, G., Vaimakis, T., Yu, J. (2008) Preparation of fluorine-doped TiO2 photocatalysts with controlled crystalline structure, International Journal of Photoenergy 2008, -.
  • Vaimakis, T.C., Economou, E.D., Trapalis, C.C. (2008) Calorimetric study of dissolution kinetics of phosphorite in diluted acetic acid, Journal of Thermal Analysis and Calorimetry 92, 783-789.
  • Zboril, R., Bakandritsos, A., Mashlan, M., Tzitzios, V., Dallas, P., Trapalis, Ch., Petridis, D. (2008) One-step solid state synthesis of capped g-Fe2O3 nanocrystallites, Nanotechnology 19, art. no.-095602.
  • Bourlinos, A.B., Bakandritsos, A., Zboril, R., Karakassides, M., Trapalis, C. (2007) Preparation of a water-dispersible carbon-silica composite derived from a silylated molecular precursor, Carbon 45, 1108-1111.
  • Bourlinos, A.B., Georgakilas, V., Boukos, N., Dallas, P., Trapalis, C., Giannelis, E.P. (2007) Silicone-functionalized carbon nanotubes for the production of new carbon-based fluids, Carbon 45, 1583-1585.
  • Bourlinos, A.B., Steriotis, Th.A., Karakassides, M., Sanakis, Y., Tzitzios, V., Trapalis, C., Kouvelos, E., Stubos, A. (2007) Synthesis, characterization and gas sorption properties of a molecularly-derived graphite oxide-like foam, Carbon 45, 852-857.
  • Dallas, P., Niarchos, D., Vrbanic, D., Boukos, N., Pejovnik, S., Trapalis, C., Petridis, D. (2007) Interfacial polymerization of pyrrole and in situ synthesis of polypyrrole/silver nanocomposites, Polymer 48, 2007-2013.
  • Giannakopoulou, T., Todorova, N., Trapalis, C., Vaimakis, T. (2007) Effect of fluorine doping and SiO2 under-layer on the optical properties of TiO2 thin films, Materials Letters 61, 4474-4477.
  • Osiceanu, P., Anastasescu, M., Anastasescu, C., Trapalis, Chr., Giannakopoulout, T., Todorova, N. (2007) An XPS study on N doped TiO2 sol-gel thin films, Proceedings of the International Semiconductor Conference, CAS 2, 353-356.
  • Trapalis, C., Giannakopoulou, T., Todorova, N., Anastasescu, C., Anastasescu, M., Gartner, M. (2007) Optical and microstructural properties of sol-gel TiOxN y thin films, Proceedings of the International Semiconductor Conference, CAS 2, 303-306.
  • Eliades, T., Trapalis, C., Eliades, G., Katsavrias, E. (2003) Salivary metal levels of orthodontic patients: A novel methodological and analytical approach, European Journal of Orthodontics 25, 103-106.
  • Koumoulidis, G.C., Katsoulidis, A.P., Ladavos, A.K., Pomonis, P.J., Trapalis, C.C., Sdoukos, A.T., Vaimakis, T.C. (2003) Preparation of hydroxyapatite via microemulsion route, Journal of Colloid and Interface Science 259, 254-260.
  • Mitrikas, G., Trapalis, C.C., Kordas, G. (2001) Tailoring the particle size of sol-gel derived silver nanoparticles in SiO2, Journal of Non-Crystalline Solids 286, 41-50.
  • Psycharis, V., Kalamakis, N., Boukos, N., Trapalis, C., Bourlinos, A., Karakasides, M. (2001) Chemical and X-ray diffraction peak broadening analysis, electron microscopy and IR studies of biological apatites, Materials Science Forum 378-381, 759-764.
  • Verganelakis, V., Nicolaou, P.D., Trapalis, C., Kordas, G. (2000) Evaluation of the critical processing parameters of ormosil coatings on the increase of the strength of glass, Journal of Non-Crystalline Solids 265, 265-275.
  • E. Hadjoudis, V.Verganelakis, C.C. Trapalis, and G. Kordas (1999) Environmental Effect of Sol-Gel Encapsulation on Photochromic and Thermochromic Anils , Molecular Engineering 8, 459-464.
  • Mitrikas, G., Deligiannakis, Y., Trapalis, C.C., Boukos, N., Kordas, G. (1999) CW and Pulsed EPR Study of Silver Nanoparticles in a SiO2 Matrix , Journal of Sol-Gel Science and Technology 13, 503-508.
  • Mitrikas, G., Trapalis, C.C., Kordas, G. (1999) Electron spin-lattice relaxation of silver nanoparticles embedded in SiO2 and TiO2 matrices, Journal of Chemical Physics 111, 8098-8104.
  • Mitrikas, G., Trapalis, C.C., Boukos, N., Psyharis, V., Astrakas, L., Kordas, G. (1998) Size distribution and EPR of silver nanoparticles in SiO2 matrix , Journal of Non-Crystalline Solids 224, 17-22.

Search the IMS database for a complete list of publications by Christos Trapalis

Department of Materials Science, N.C.S.R. "Demokritos", 153 10 Aghia Paraskevi, Attiki, phone: +30 210 6503381, fax: +30 210 6519430
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