Home Page Researchers Yuri Feldman

Yuri Feldman

School of Engineering and Computer Science
Faculty of Science
The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Tel: +972-2-6586187; Fax: +972-2-5653878;
E-mail:yurif@vms.huji.ac.il
Website: http://aph.huji.ac.il/people/feldman/index.htm

Dielectric Response of Complex Systems at Mesoscale

The research interests of the laboratory of Dielectric Spectroscopy are centered on the area of soft condensed matter physics for investigation of the structure, dynamics, and macroscopic behavior of complex systems. (CS). CS is a very broad and general class of materials, which include associated liquids, polymers, biomolecules, colloids, porous materials, composites ferroelectrics and liquid crystals.

The dynamical processes occurring in Complex Systems involve different length and time scales. Fast as well as ultra-slow molecular rearrangements take place in the presence of the microscopic, mesoscopic and macroscopic organization of the systems. Commonly, the complete characterization of these relaxation behaviors requires the use of variety techniques in order to span the relevant ranges in frequency. In this view, the use of Dielectric Spectroscopy (DS) is very advantageous. The modern technique may overlap extremely wide frequency (10-6 -1012 Hz) and temperature (-170 oC - +500 oC) ranges, and therefore, these method is more then any others appropriate for such different scales of molecular motions.

The general goal of the DS study of complex systems is to determine their structure and its dynamics, how it arises, and how it influences the macroscopic behavior. It is of great fundamental interest since while we understand the physics controlling the behavior of individual atoms and molecules, and the physics controlling the behavior of macroscopic chunks of matter, we are relatively ignorant of the complex connection between these well-known limits, and completely new and unexpected behaviors often arise. The significance of these studies is not only to attempt to systematically study the influence of geometrical peculiarities on molecular dynamics, but also to lay the experimental and theoretical foundations for future technological progress in this field. The studies provide the theoretical and experimental foundation for designing and fabricating new materials and devices with prescribed architectures and properties.

Specific research topics related to Nanoscience and Nanotechnology:

The research is focused both on solid as well as liquid systems, such as:

  • Structure and non-exponential dynamics in glass forming systems (see Figure 1)

Figure 1:(left)The average X-ray diffraction intensity I versus double angle 2θ for different concentrations of G/W mixtures at room temperature (right Typical master plots of glycerol-water mixtures

  • Dielectric properties of new electrooptic materials (See Figure 2)

Figure 2: The dielectric losses ( Im(ε *)) of the Cu doped KTN crystal. The ferroelectric phase transition is evident at T=296 K

  • Dielectric properties of Nano-Composed Tailor-Made Metal-Polymer Materials

Figure 3: The three dimension plots of the frequency and temperature dependence of the dielectric losses ε'' for porous glass sample containing Pd nanoparticles after it's annealing at 200 0C for 3 hours

  • Single-Molecule Ion Conducting Channels

Figure 4: 3-d plot of frequency and temperature dependence of the dielectric modulus of PEO-based polymer electrolytes with incorporated magnetic nanoparticles cast under gradient magnetic field.

Figure 5: Lab on chip for dielectric spectroscopy of living cells in broad band, high frequencies

List of publications in nanoscience and nanotechnology (2008-2012):

  • A. Caduff, M.S. Talary, Yu. Feldman, Comment on experimental methods and conclusions of impedance spectroscopy of solutions at physiological glucose concentrations by A. Tura, S. Sbrignadello, S. Barison, S. Conti, G. Pacini, Biophysical Chemistry (2008) Vol. 132, pp.165?166.
  • Yu. Feldman, A.Puzenko, P.Ben Ishai, A.Caduff, and A. J. Agranat,? Human Skin as Arrays of Helical Antennas in the Millimeter and Submillimeter Wave Range?, PRL (2008) Vol. 100, pp. 128102-4.
  • L. Livshits, A. Caduff, M. S. Talary, Y. Hayashi, A. Puzenko, A. Shendrik and Yu. Feldman, "Dielectric Response of Human Erythrocyte Membranes", J. Phys. Chem. B (2009), Vol. 113, pp. 2212?2220.
  • D. Lev, A. Puzenko, A. Manevich, Z. Manevich, L. Lifshits, Yu. Feldman, and A. Lewis, ?D-Glucose-Induced Second Harmonic Generation Response in Human Erythrocytes?, J. Phys. Chem. B (2009), Vol. 113, pp.2513?2518.
  • Yu. Feldman, A. Puzenko, P. Ben Ishai, A. Caduff, F. Sakran and A. J. Agranat, ?The electromagnetic response of human skin in millimetre and sub millimetre wave range; I. Experimental observation?, Physics in Med. and Biol. (2009) Vol. 54, pp. 3341?3363.
  • P. Ben Ishai, D. Libster, A. Aserin, N.Garti and Yu. Feldman, ?Molecular interactions in lyotropic reverse hexagonal liquid crystals. A dielectric spectroscopy study", J. Phys. Chem. B (2009) Vol. 113 , pp. 12639-12647.
  • L.I. Trakhtenberg, M.A. Kozhushner, G.N. Gerasimov, V.F. Gromov, V.L. Bodneva, T.V. Antropova, E. Axelrod, A. Greenbaum (Gutina), and Yu. Feldman, ?Non-phenomenological description of complex dielectric permittivity of metal-containing porous glasses? Journal of Non-Crystalline Solids (2010) Vol. 356 pp. 642?646
  • A. Puzenko, P. Ben Ishai and Yu. Feldman, ?Cole-Cole broadening and strange kinetics in dielectric relaxation? PRL (2010) Vol. 105, pp. 037601-4
  • Y. Ryabov, A. Gutina, Yu. Feldman, S. Frunza, L. Frunza, A. Schoenhals,?Comment on "Investigating hydration dependence of dynamics of confined water: Monolayer, hydration water, and Maxwell-Wagner processes" [J. Chem. Phys. 128, 154503 (2008)]? Journal of Chemical Physics (2010) Vol. 133, pp.037101-4.
  • P. Ben Ishai, D. Libster, A. Aserin, N. Garti, and Yu. Feldman, ?Influence of Cyclosporine A on Molecular Interactions in Lyotropic Reverse Hexagonal Liquid Crystals?, Journal of Physical Chemistry B (2010) Vol. 114, pp. 12785-12791
  • E. Safrai, P. Ben Ishai, A. Caduff, A. Puzenko, A. Polsman, A.J. Agranat and Yu. Feldman, ?The Remote Sensing of Mental Stress from the Electromagnetic reflection coefficient of human skin in the Sub-THz Range? Bioelectromagnetics (2012) Vol. 33, pp. 375-382
  • E. Levy, A. Puzenko, U. Kaatze, P. Ben Ishai and Yu. Feldman, ?Dielectric spectra broadening as the signature of dipole-matrix interaction; I. Water in nonionic solutions?, J. Chem. Phys. (2012) Vol. 136, 114502-7.
  • E. Levy, A. Puzenko, U. Kaatze, P. Ben Ishai and Yu. Feldman, ?Dielectric spectra broadening as the signature of dipole-matrix interaction; II. Water in ionic solutions?, J. Chem. Phys. (2012) Vol. 136, 114503-7.
  • E. Levy, A. Puzenko, A. Caduff, M. S. Talary and Yu. Feldman, ?Dielectric spectra broadening as a signature for dipole-matrix interaction. III. Water in adenosine monophosphate/adenosine-5?-triphosphatesolutions?, J. Chem. Phys. (2012) Vol. 137, 194502-8.
  • I. Hayut, A. Puzenko, P. Ben Ishai, A. J. Agranat and Yu. Feldman, ?The helical structure of sweat ducts: Their influence on the electromagnetic reflection spectrum of the skin?, IEEE Transactions on Terahertz Science and Technology (in press).
  • T. Mishraki, P. Ben Ishai, D. Babukh, A. Aserin, Yu. Feldman, and N. Garti,? Modulation of physical properties of HII mesophases: a dielectric spectroscopy study? Journal of Colloid and Interface Science (2012 in press)
  • S. E. Lerner, Yu. Feldman, and P. Ben Ishai, ?Polaron Dynamics in Crystalline and Semi-Crystalline Systems?, EPJ (2012 submitted).
  • S. E. Lerner, P. Ben Ishai, M. Mierzwa, M. Paluch, A. J. Agranat, and Yu. Feldman, ?Multivariate Pressure Effects on an Electron Hopping Process in Ferroelectric KTaNbO3?, Physical Review B (2012 submitted).

Most significant publications in the last five years:

  • Yu. Feldman, A. Puzenko and Ya. Ryabov,?Dielectric Relaxation Phenomena in Complex Materials?, in: Advances in Chemical Physics, Volume 133, John Wiley & Sons, Ltd, (2006), pp.1-125.
  • Yu. Feldman, A. Puzenko, P. Ben Ishai, A. Caduff, and A.J. Agranat, ?Human Skin as Arrays of Helical Antennas in the Millimeter and Submillimeter Wave Range? PRL (2008), Vol, 100, 128102-4.
  • L. Livshits, A. Caduff, M. S. Talary, Y. Hayashi, A. Puzenko, A. Shendrik and Yu. Feldman, "Dielectric Response of Human Erythrocyte Membranes", J. Phys. Chem. B (2009), Vol. 113, pp. 2212?2220.
  • A. Puzenko, P. Ben Ishai and Yu. Feldman, ?Cole-Cole broadening and strange kinetics in dielectric relaxation? PRL (2010) Vol. 105, pp. 037601-4
  • E. Safrai, P. Ben Ishai, A. Caduff, A. Puzenko, A. Polsman, A.J. Agranat and Yu. Feldman, ?The Remote Sensing of Mental Stress from the Electromagnetic reflection coefficient of human skin in the Sub-THz Range? Bioelectromagnetics (2012) Vol. 33, pp. 375-382
  • E. Levy, A. Puzenko, U. Kaatze, P. Ben Ishai and Yu. Feldman, ?Dielectric spectra broadening as the signature of dipole-matrix interaction; I. Water in nonionic solutions?, J. Chem. Phys. (2012) Vol. 136, 114502-7.
  • E. Levy, A. Puzenko, U. Kaatze, P. Ben Ishai and Yu. Feldman, ?Dielectric spectra broadening as the signature of dipole-matrix interaction; II. Water in ionic solutions?, J. Chem. Phys. (2012) Vol. 136, 114503-7.
  • E. Levy, A. Puzenko, A. Caduff, M. S. Talary and Yu. Feldman, ?Dielectric spectra broadening as a signature for dipole-matrix interaction. III. Water in adenosine monophosphate/adenosine-5?-triphosphatesolutions?, J. Chem. Phys. (2012) Vol. 137, 194502-8.
  • I. Hayut, A. Puzenko, P. Ben Ishai, A. J. Agranat and Yu. Feldman, ?The helical structure of sweat ducts: Their influence on the electromagnetic reflection spectrum of the skin?, IEEE Transactions on Terahertz Science and Technology (in press).

Patent (2005-2008)

  • "Method and System for Determination of Physiological Conditions and Emotional States": Feldman Yuri; Ben-Ishai Paul; Puzenko Alexander; Caduff Andreas; Agranat Aharon, PCT, WO 2006126186, 30.11.06, EP1895897, 13.11.08.
  • 2. Method and device for determining a parameter of living tissue, Feldman Yur, Andreas Caduff, US Patent No: 8,200,307

Cooperation with other universities in Israel:

The program involves collaborations with research groups at the Hebrew University and worldwide. The various research programs within this collaboration seek to exploit this exciting combination of joint skills and outlooks in the design of new materials and physical methods of their characterization.

Within Hebrew University:
Prof. Ronny Agranat, Department of Applied Physics, The Hebrew University, Jerusalem
Prof. Aharon Lewis, Department of Applied Physics, The Hebrew University, Jerusalem
Prof. Uriel Levi, Department of Applied Physics, The Hebrew University, Jerusalem
Prof. Yossi Paltiel Department of Applied Physics, The Hebrew University, Jerusalem
Prof. Uri Raviv, Institute of Chemistry, The Hebrew University, Jerusalem
Prof. Daniel Harrison, Institute of Chemistry, The Hebrew University, Jerusalem
Prof. Nissim Garti, Institute of Chemistry, The Hebrew University, Jerusalem

With other universities:

Prof. Itamar Procaccia, Institute of Chemical Physics, Weitzman Institute, Rehovot, Israel
Prof. Irit Sagi, Dept of Structural Biology, Weitzman Institute, Rehovot, Israel
Prof. Martina Havenith, Institute of Phaysics, Ruhr University, Bochum, Germany
Prof. Rudolf Hilfer, Department of Physics, Stuttgart University, Stuttgart, Germany
Prof. Udo Kaatze, Drittes Physikalisches Institut, Georg-August-University, Goettingen, Germany
Prof. Gene Stanly, Department of Physics, Boston University (USA)
Prof. Alexei Sokolov, Department of Physics, University of Tennessee (USA)
Prof. Valerica Raicu, the Department of Physics, University of Wisconsin (USA)
Prof. Reimund Gerhard, The Dean of the faculty of Science of the Potsdam University, (Germany)
Prof. Kodo Kawase, The Department of Physics, Nagoya University (Japan)
Prof. Dr. Jan Gimsa (PhD, DSc) Chair of Biophysics, University of Rostock, Rostock (Germany)
Prof. Michael Wuebenhorst, Department of Physics, The Catholic Uinversity of Leuvin, (Belgium)
Prof. Leonid Trakhtenberg, Institute of Physical Chemistry (Moscow, Russia)

Students and researchers (include those graduated in 2008-2009):

Staff scientists: Dr. Alexander Puzenko, Dr. Anna Greenbaum, Dr. Vladimir Rozenshtein, Dr. Paul Ben Ishai
Ph.D. students (present and graduated):  Leonid Livshits, (2007), Paul Ben Ishai (2009) presently the manager of the Centre for Electromagnetic Research and Characterization, Shimon Lerner (2011), Eli Safrai (2012), Lev Lavi, Evegenia Levi, Yael Segev, Daniel Agranovich.
M.Sc. Students (present and graduated): Daniel Babuch (2009), Tomer Rahamim (2010), Ido Segev (2011), Ziv Sobol (2011), Alexander Polsman, Moshe Brodski, Olga Maxaimov.

 

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