Experimental Characterization and Modelling of Electric, Elastic and Optical Properties of Linear and Non Linear Complex Systems

Specific mission

The unit performs modeling and experimental studies of the conductive, elastic and electro-optical properties of complex systems exhibiting an anomalous/nonlinear behavior. The activity consists in the development of analytical, phenomenological and computational approaches, to support comprehension /interpretation of experimental data. Merging experimental activities and theoretical approaches allows optimization and development of new experimental methods. The research aims to identify the physical mechanisms responsible of the behaviors observed in specific physical conditions (e.g.low/high frequency, large strains, proximity to order transitions, etc.), aiming to possible application of industrial interest.

Main research topics

  • Modeling of conductivity in complex ionic solutions using models based on the Poisson-Nernst-Planck equation; electrical properties of nanostructured electrodes in contact with electrolytes
  • Electrically controlled birefringence and dielectric susceptibility in liquid crystals by means of electro – optical techniques, optical microscopy and differential scanning calorimetry
  • Multi-scale modeling of the elastic properties of compact granular media using discrete multistate (phenomenological) approaches and physical models with local interactions
  • Characterization and classification of elastic and viscous properties of solids through the separation of damping and modulus nonlinearities both in experimental observations and in theoretical models
  • Application of nonlinear elasticity to the characterization of solid materials, using techniques based on the Scaling Subtraction Method or on Nonlinear Time Reversal and Dynamic AcoustoElastic Testing
  • Design of novel elastic metamaterials with special filtering and focusing properties (e.g. acoustic diode) and development of self-healing systems for concrete

Main partnerships

  • P.Antonaci, DISEG, Politecnico di Torino, Italy
  • M.Bentahar, Laboratoire d’Acoustique de l’Universitè du Maine (LAUM), LeMans, France;
  • M.Griffa, Empa -Swiss Federal Laboratories for Materials Science and Technology, Zurich, Switzerland;
  • G.Renaud, Universitè Pierre and Marie Curie, Paris, France
  • F.Boubenider, Univeristy of Algers, Algers, Algeria
  • B.Morvan, University of Le Havre, Le Havre, France
  • N.Pugno, University of Trento, Trento, Italy
  • A.L.Alexe-Ionescu, Universitatea Politechnica Bucuresti, Bucharest, Romania
  • I.Lelidis, University of Athens, Athens, Greece
  • A.M.Figueiredo Neto, University of Sao Paulo, Sao Paulo, Brasil
  • L.R.Evangelista, UEM University of Maringa, Maringa, Brasil
  • S.I.Torgova, P.N. Lebedev FIAN, Russian Academy of Sciences, Moscow (Russia)
  • Y.A.Aleshchenko, National Research Nuclear University “MEPhI”, Moscow (Russia)

Projects and publications

Reference laboratories