Head of group

contact information

Head of Dielectric Materials Group

Physics Department, NTUA, Zografou Campus, 15780, Athens, Greece

e-mail: akyrits@central.ntua.gr

tel.: +30 210 772 3053

Office 114


Dr. Kyritsis Apostolos is Associate Professor at the Physics Department of National Technical University of Athens – NTUA, Greece. He teaches elementary Physics and special topics of Physics of Dielectric Materials, Materials Science, and Advanced Technological Materials at under-graduate level. At post- graduate level he participates in three MSc Programmes teaching special topics of Nanomaterials, Glasses and Nanocomposites, and Organic Nanomaterials. He is main coordinator/partner in international and national projects. He has published more than 110 journal papers, more than 30 papers in conference proceedings and 5 book chapters. He has more than 210 contributions to international conferences. Dr Kyritsis has been involved in national and international standardisation activities working at the Greek National Standardization Body (ELOT) between 2000 and 2005 and is strongly interested in metrology aspects of experimental measurements.

Research Area

  • Dielectric, thermal, calorimetric and vapor sorption studies in ionic crystals, ceramics, polymers and complex polymeric systems
  • Structure-property relationships in polymers, biopolymers, nanocomposites
  • Hydration properties of inorganic and organic (polymers, biomaterials) materials
  • Confinement effects on adsorbed water molecules, organic solvents and macromolecules. The confining medium can be porous materials, intercalated clays, cross linked polymeric chains.
  • Stimuli responsive behavior of novel polymeric systems

Selected Publications

  • Klonos P.A., Patelis N., Glynos E., Sakellariou G., Kyritsis A. Molecular dynamics in polystyrene single chain nanoparticles. Macromolecules 52 (2019) 9334-9340. (download)
  • Kripotou S, Stefanopoulou E, Culebras-Martinez M, Morales-Roman RM, Gallego-Ferrer G, Kyritsis A. Water dynamics and thermal properties of tyramine-modified hyaluronic acid-gelatin hydrogels. Polymer 178 (2019) 121598. (download)
  • Klonos P.A., Tegopoulos S.N., Koutsiara C.S., Kontou E., Pissis P., Kyritsis A. Effects of CNTs on thermal transitions, thermal diffusivity and electrical conductivity in nanocomposites: comparison between an amorphous and a semicrystalline polymer matrix. Soft Matter 15 (2019) 1813-1824. (download)
  • D. Aravopoulou, K. Kyriakos, A. Miasnikova, A. Laschewsky, C.M. Papadakis, A. Kyritsis.Comparative investigation of the thermoresponsive behavior of two diblock copolymers comprising PNIPAM and PMDEGA blocksJournal of Physical Chemistry B 122 (2018) 2655-2668, 2018. (download)
  • P.A. Klonos, P. Pissis, A. Kyritsis. Effects of hydration/dehydration on interfacial polymer fraction and dynamics in nanocomposites based on metal-oxides and physically adsorbed polymerJournal of Physical Chemistry C 121 (2017) 19428-19441. (download)
  • K. Sasaki, A. Panagopoulou, R. Kia, N. Shinyashiki, S. Yagihara, A. Kyritsis, P. Pissis.Dynamics of uncrystallized water, ice, and hydrated protein in partly crystallized gelatin-water mixtures studied by broadband dielectric spectroscopyJournal of Physical Chemistry B 121 (2017) 265-272. (download)
  • S. Kripotou, C. Psylla, K. Kyriakos, K.N. Raftopoulos, J. Zhao, G. Zhang, S. Pispas, C.M. Papadakis, A. Kyritsis.Structure and crystallization behavior of poly(ethylene oxide) (PEO) chains in core-shell brush copolymers with poly(propylene oxide)-block-poly(ethylene oxide) side chainsMacromolecules 49 (2016) 5963-77. (download)
  • P. Klonos, K. Kulyk, M.V. Borysenko, V.M. Gun’ko, A. Kyritsis, P. Pissis. Effects of molecular weight below the entanglement threshold on interfacial nanoparticles/polymer dynamics. Macromolecules 49 (2016) 9457-9473. (download)
  • P. Klonos, I.Ya. Sulym, M.V. Borysenko, V.M. Gun’ko, S. Kripotou, A. Kyritsis, P. Pissis. Interfacial interactions and complex segmental dynamics in systems based on silica-polydimethylsiloxane core-shell nanoparticles: Dielectric and Thermal studyPolymer 58 (2015) 9-21. (download)
  • A. Panagopoulou, JV. Molina, A. Kyritsis, MM. Pradas, AV. Lluch, GG. Ferrer, P. Pissis. Glass Transition and Water Dynamics in Hyaluronic Acid Hydrogels. Food Biophysics 8 (2013) 192-202. (download)
  • A. Panagopoulou, A. Kyritsis, M. Vodina, P. Pissis. Dynamics of uncrystallized water and protein in hydrated elastin studied by thermal and dielectric techniquesBiochimica et Biophysica Acta (BBA) Proteins and Proteomics 1834 (2013) 977-988. (download)
  • P. Pissis, A. Kyritsis. Hydration studies in polymer hydrogels. J. Polym. Sci. B: Polym. Phys. 51 (2013) 159-175. (download)
  • A. Panagopoulou, A. Kyritsis, N. Shinyashiki, P. Pissis. Protein and water dynamics in bovine serum albumin-water mixtures over wide ranges of compososition. J. Phys. Chem. B 116 (2012) 4593-4602. (download)
  • A. Panagopoulou, A. Kyritsis, R. Sabater I Serra, J.L. Gomez Ribelles, N. Shinyashiki, P. Pissis. Glass transition and dynamics in BSA-water mixtures over wide ranges of composition studied by thermal and dielectric techniques. Biochim. Biophys. Acta – Proteins and Proteomics 1814 (2011) 1984-1996. (download)
  • A.T. Stathopoulos, A. Kyritsis, G. Gallego Ferrer, J.L. Gomez Ribelles, C. Christodoulides, P. Pissis. Cooperative segmental motions in ethyl acrylate/triethylene glycol dimethacrylate copolymer networks studied by dielectric techniques. Macromolecules 44 (2011) 8233-824. (download)
  • N. Shinyashiki, A. Spanoudaki, W. Yamamoto, E. Nambu, K. Yoneda, A. Kyritsis, P. Pissis, R. Kita, and S. Yagihara. Segmental relaxations of hydrophilic poly(vinylpyrrolidone) in cloroform studied by broadband dielectric spectroscopy. Macromolecules 44 (2011) 2140-2148. (download)
  • P. Klonos, A. Panagopoulou, L. Bokobza, A. Kyritsis, V. Peoglos, P. Pissis. Comparative studies on effects of silica and titania nanoparticles on crystallization and complex segmental dynamics in poly(dimethylsiloxane). Polymer 51 (2010) 5490-9. (download)
  • A. Kyritsis, K. Raftopoulos, M.A. Rehim, Sh.S. Shabaan, A. Ghoneim, G. Turky. Structure and molecular dynamics of hyperbranched polymeric systems with urethane and urea linkagesPolymer 50 (2009) 4039-47. (download)