Soft and Active Matter

Soft and active matter systems like colloidal suspensions, biological model membranes, vesicles, gels and micro-swimmers (artificial and biological), are studied applying methods from statistical physics and fluid dynamics.
Special focus is given to the understanding of the physics of experimental systems in other disciplines, like biology, chemistry, microfluidics and bio-engineering.
Current main lines of research are:

  • Structure, dynamics and rheology of colloidal suspensions
  • Langmuir monolayers
  • Formation and dynamics of dipolar gels
  • Biological micro-swimmers dynamics: human sperm cells, choanoflagellates, soil acteria and artificial nano- and micro-machines
  • Micro-confined biological micro-swimmers: applications to reproductive medicine, evolutionary biology and sustainable agronomy.
  • Micro-devices and microfluidics. Design and optimization of biological rectifiers.
    Bacterial dynamics and transport in porous media

Atmospheric Science

The Group of Atmospheric Science of the IFEG studies the physical processes occurring in the low and high atmosphere. The physical studies are carried out in two main areas:

Cloud physics and Ice physics

The cloud physics studies are:

  1. Microphysical cloud processes: experimental and theoretical studies of nucleation of ice phase, formation, growth and evolution of ice crystals, hail formation and accretion processes.
  2. Cloud electrification: efficiency of the electric charge transfer mechanism by collisions between a graupel and ice crystals growing by vapor phase in conditions similar to those present in ordinary storms and severe storms, in-situ measurements of surface electric field and precipitation particles charge, variations of the electric field during the formation and development of storms.
  3. Lightning data: analysis of lightning data, obtained with different lightning detection systems, in order to make climatology studies over diverse regions and to use them as possible indicators of severe meteorological events.

The ice physics studies are:

  1. Grain edge (BG) mobilities on ice. Effect of low concentrations of soluble impurities (ClK, ClNa) together with the effect of pressure and temperature on the movement of BG in bicrystalline samples.
  2. Effect of soluble impurities (ClK, ClNa) on the surface energy of grain boundaries and free surfaces on ice.
  3. Effect of the inclination of the edge of grain in the superficial energy of same and of free surfaces in ice.
  4. 3D grain growth. The approach is computational, the used program allows to add all the natural effects that exist in the polar ice that regulate the size of its grains. The effects of impurities, anisotropic energy and uniaxial or cutting pressure will eventually be included in order to take into account observable effects in polar ice. In the future, the computational data will be subjected to a comparison with data obtained from the drilling of WAIS (Antarctica). In this way, with this project we wish to continue collaborating in the interpretation of the phenomena that occur in the Antarctic ice corresponding to these perforations.

 

Electronic and Instrumentation Development

Activities concerning experimental development, tutoring, extension, management and specialized technical support are currently conducted.

Experimental support activities relate to the study, development and implementation of scientific instruments for non-conventional applications. Such systems include parallel and/or fault tolerant architectures with built-in self-test facilities for both digital signal processing and real time simulations. Moreover, new state-of-the-art methods and tools are incorporated in related areas.

Technological research areas include virtual instrumentation, digital signal processing and the development of fault-tolerant systems with built-in self-test capability.

Staff:

  • Félix, Daniel Esteban – CPA CONICET
  • Ferreyra, Pablo – Dr. Ing. Electrónico – Prof. Adjunto DSE
  • Fraire, Juan – Dr. Ing. en Telecomunicaciones.
  • Laprovitta, Agustín – Dr. Ing. Electricista Electrónico – Prof. Asistente DS
  • Peretti, Gabriela – Dra. Dr. Ing. Electrónico – Prof. Adjunto DS
  • Romero, Eduardo – Dr. Ing. Electricista Electrónico – Prof. Titular DS
  • Velez, Delfina Ing. Electrónico – Prof. Asistente DSE – Becaria doctoral CONICET
  • Vodanovic, Gonzalo – Prof. Asistente DSE
  • Zaninetti Walter – Ing. Electricista Electrónico – Prof. Titular DS – CPA CONICET – Profesional Principal

Medical Physics

The IFEG-FaMAF Medical Physics team and the Laboratory of Research and Instrumentation in Physics Applied to Medicine and X-Ray Imaging – LIIFAMIRx, is the research group of Medical Physics and Applied Radiophysics of the Institute of Physics E. Gaviola and the Faculty of Mathematics, Astronomy and Physics of the University of Córdoba, Argentina. Created in 2008, it is a young scientific-academic group in continuous growth. It is a multidisciplinary research team consisting of physicists, chemists, electronic engineers, mathematicians, computer scientists, among others. The research interests and problems addressed cover a wide variety of fields, including:

  • Theory and methods of radiation transport
  • Material development for biomedical applications
  • 3D advanced dosimetry
  • Computational physics
  • Medical image processing
  • Nuclear medicine and internal dosimetry
  • Development of specific instrumentation
  • Software for biomedical applications
  • 2D High precision radiology and high resolution microtomography.
  • Characterization of neutron columns in nuclear reactors and BNCT.
  • Monte Carlo simulation of light particles and heavy ions for radiotherapy applications.
  • Development of innovative radiological therapies and techniques based on nanoparticles.

On this web page: http://liifamirx.famaf.unc.edu.ar/ about the team members is provided along with scientific publications, research projects, facilities and services, teaching materials, services to the industry and health system, as well as opportunities for human resources to join the group in collaborations.

Nuclear Magnetic and Quadrupole Resonance

Fundamental and applied studies based on magnetic resonance techniques are performed. In particular, the experimental study of materials within what is known as condensed matter. At the same time, new developments are carried out in the area of ​​magnetic resonance such as sensitivity improvement techniques and imaging. In the area of ​​fundamental studies, magnetic resonance is used as a tool to elucidate fundamental quantum processes in spin decoherence, polymer physics and molecular dynamics.

The main lines of research are:

  • Fundamentals in spin decoherences
  • Studies of porous systems.
  • Characterization of active pharmaceutical products.
  • Polymer physics.
  • Hyperpolarization.
  • Molecular dynamics in disordered systems and molecular crystals.
  • Characterization of support materials for catalysis.
  • Studies of physical and chemical processes in lithiated materials.
  • Biophysics of lipid membranes: elastic properties and molecular dynamics.
  • Development of instrumentation and experimental techniques of cycled magnetic field.

The main instruments available on the group are associated to the National Magnetic Resonance System (Sistema Nacional de Resonancia Magnética). They are available to provide services to public and private institutions. These services are carried out through the corresponding STANs of CONICET.

Quantum Physics

The methods to prepare and control quantum states, and to process their information content, are nowadays a research area as important as the traditional calculation of spectra and physical properties of different quantum systems. The degree of control achievable in condensed systems, ultracold atomic gases and ion crystals is becoming comparable with the one reached decades ago for atomic or molecular few-body systems, leading to ever longer decoherence times. Such high controllabilities and long decoherence times are essential for quantum information processing tasks. Using various numerical and analytical techniques we theoretically model:

  • Quantum dots under the effective mass approximation.
  • Electronic structures of atoms and molecules.
  • Ions and atoms in optical and electromagnetic traps.
  • Superconducting qubits.
  • Quantum state transfer in chains or graphs.
  • Quantum state control.
  • Spectral properties of reduced density matrices in bosonic or fermionic systems.
  • Asymptotic entanglement properties in open quantum systems.
  • Quantum Dynamics of Coupled Spin Systems​
  • Loschmidt Echoes in Quantum Chaos and Decoherence.

Laboratory of sustainable energy

In the laboratory of sustainable energy we develop novel materials that are used as anode and cathode for lithium-ion, lithium-sulfur batteries. The aim is to enhance the charge/discharge specific capacity, cyclability and power of lithium-ion and/or lithium-sulfur batteries. In order to obtain these novel materials, we use different methods of synthesis (sol-gel, precipitation, ceramic, ball milled, etc.) and several treatments. These materials are used afterwards as electrodes in coin-cell and T-cell to study their electrochemical performance with the goal of getting high power electrodes. This allows us to obtain a structure/properties ratio based on which we can re-design the strategy of synthesis.

On the other hand, we use different computational methods (DFT, MC, KMC, MD, etc.) in order to get deeper insight on the microscopic properties and events that occur at surface and bulk scale of the experimentally studied materials (microscopic interactions, density of energies, density of states, diffusion and reaction mechanism, etc.)

This way, in our laboratory we use complementary experimental and theoretical tools in order to develop novel materials for lithium batteries.

The aforementioned computational tools are also employed to study other systems,
such as surface processes that occur in the anodes or cathodes of fuel cells.

More information on the LAES web page:
http://www.laesunc.com/laes/

Statistical Physics and Dynamic Systems

Different techniques from both equilibrium and non equilibrium Statistical Physics (such as Monte Carlo and Molecular Dynamics Simulations, Mean Field Theory, Renormalization Group, Transfer Matrix, Stochastic Differential Equations, Complex Networks, etc.) are devoted to the study of several problems from physics and biology, such as phase transitions and critical phenomena in magnetic and biological systems, magnetization processes in materials, neural networks, complex networks, data bases complexity, community detection in complex networks, transport and characterization of excitations, KPZ equation as a flow gradient, etc..

The main research lines at the present are the following:

  • Thermodynamics and pattern formation in ultrathin magnetic films.
  • Modeling of magnetization processes in materials.
  • Dynamics of magnetic domains over pinning geometries.
  • Phase transitions and critical phenomena in lattice models.
  • Statistical Physics of brain activity patterns.
  • Dynamics and percolation in mithocondrial networks.
  • Synchronization in complex networks: applications to chronobioloby.
  • Multiscale analysis of complex systems and complex networks.
  • Structure and dynamics of colloidal suspensions and gels.
  • Ratchet effect.
  • Dynamics of interphases.
  • Opinion formation modeling.
  • Three bodies problem dynamics.
  • Simulations of wet convection at high Rayleigh numbers.

Atomic and nuclear spectroscopy

Basic and applied studies relying on x-ray emission spectroscopy are complemented with related methodologies. The main areas involved are: interaction of radiation with matter; synchrotron radiation; materials characterization through conventional X-Ray Fluorescence, as well as grazing angle and high resolution techniques; electron probe microanalysis; small-angle x-ray and neutron scattering; x-ray diffraction; electron backscatter diffraction; inelastic x-ray scattering; x-ray imaging; applications to positron lifetime spectroscopy.

Physics Education

Research on Physics Education is conducted focusing on both learning and teaching. Our research program includes topics that can be grouped in the following areas: Physics Problem Solving, Physics Curriculum, and Physics Teaching. At present, our activities are focused on the first and third of these topics. Within them, students’ cognitive processes, as well as the interplay with interactional characteristics, are addressed.

Besides research, most members of the group participate or have participated in in-service teacher training programs. Among these, collaborating in the design of the Physics curriculum for secondary and university levels and participating in different teacher-training programs directed to high-school and university Physics teachers.