Interests

Molecular dynamics in disordered systems - Fundamentals


  • Comparative study of the dynamics of amorphous polymers by relaxation techniques and physicochemical methods

  • Investigation of the effects on the structure and local dynamics of polymers, composites and glass-forming liquids induced by confinement in small volumes of nanometric size

  • Study of polymeric chain dynamics in different systems of well defined architectures (block copolymers, star-like macromolecules, dedrimers) under variation of chemical and geometrical restrictions

Investigation of structure-property relationships in various composite materials


  • Relationships between polymer mobility, material microstructure and macroscopic physical properties

  • Development of methodologies for structural and morphological characterization of nanostructured materials using dielectric measuring techniques

  • Nanoscale modifications of brittle polymer networks by flexible crosslinks

  • Measurements and modeling of the electrical conductivity in nanocomposites consisting of conductive and insulating regions

  • Dynamics and molecular motions in various composite materials: polymeric blends, IPNs, block copolymers, engineering thermoplastics and thermosets, hyperbranched polymers, hybridic materials (polymeric matrix with inorganic inclusions like metal oxides, clays, POSS particles, CNTs)

Electrical conductivity of materials


  • Conductivity effects in various systems: polymer electrolytes – ionic conductors, two- or multi-phase systems exhibiting a percolation-type conductivity (insulating polymeric matrix with conductive inclusions (e.g. metallic particles, CNTs, conductive polymeric phase)
  • Monitoring of changes in electrical resistivity and in dielectric properties of swollen conductive polymeric nanocomposites and inherently conductive polymers which can be potentially used in gas sensing applications
  • Properties of conductive composite polymeric systems used in electromagnetic shielding applications


Thermal conductivity of materials


  • Processes of heat transfer in a variety of neat materials (polymers, ceramics, metals) or in composites (or nano-composites) based on those matrices

Hydration properties of materials


  • Investigation of the hydration properties of polymers, composites and nanostructured polymer-based materials including both, the various forms of water molecules organization in these materials and the effects of water on the structure and local dynamics of the matrix material
  • Local molecular dynamics and origin of interactions existed between adsorbed water molecules and biocompatible materials. Comparative study of hydrogels by various techniques
  • Molecular dynamics of proteins and thermal transitions at various levels of hydration
  • Equilibrium Sorption and water diffusion measurements on both hydrophilic and hydrophobic materials in a wide range of relative humidities
  • Hydration properties and transport phenomena in porous media (e.g. silica, natural rocks) and in materials candidates for food packaging applications

DNA damage and repair in cells and tissues


  • Clustered DNA damage measurement in cells and tissues of different origin using novel DNA electrophoretic approaches like Single Cell Gel Electrophoresis (SCGE; Comet Assay), adaptation of constant field gel electrophoresis using human repair enzymes as damage probe

  • Assessment of the role of oxidatively-induced DNA damage in carcinogenesis at the cellular or tissue level in combination with chromosomal breaks analysis (in collaboration with Dr. Pantelias group at NCSR ‘Demokritos’)

  • Role of radiation-induced DNA damage and inflammation in tissue injury. In this case cells and tissues from mice exposed to relatively low doses of ionizing radiation (2-3 Gy) are examined and analyzed for various parameters like clustered DNA damage, oxidative stress (ROS, antioxidant enzymes etc..) and inflammation markers; cytokines, chemokines etc. (in collaboration with Prof. Gorgoulis group at the Medical School, UOA)

  • Dielectric characterization of human or mice tissues for damage and other structural changes in collaboration with various hospitals and universities

Molecular dynamics and conductivity exhibited by materials under on line varying atmosphere (gas sensors applications)
 

Monitoring of reactive chemical processes (curing of thermosetting polymers)

Structural health monitoring of conductive filler reinforced polymer composites via dc and ac conductivity measurements (by combining mechanical and dielectric measurements on line)

 

Investigation of the thermoresponsive behavior of novel polymeric systems

 

Molecular dynamics in liquid crystals (smectic and discotic forms) and liquid crystalline polymers