Kyungpook National University
Department of Physics.
> 사람&연구 > 교수진 > 교수
교수
  • 파나요티스 베네타토스교수
  • Professor Benetatos, Panayotis
연구분야
연구실
제 1과학관 218-2호 ,053-950-7355
이메일
pben@knu.ac.kr
홈페이지
  • 학력/경력
  • 연구소개
  • 최근 5년간 주요논문

학력

  • · 2000Ph.D. in Physics, Syracuse University, Syracuse, NY, USA
  • · 1995Sc.M. in Physics, Brown University, Providence, RI, USA
  • · 1993B.Sc. in Physics, National and Kapodistrian University of Athens

주요경력

  • · 2018-presentAssociate Professor, Kyungpook National University
  • · 2012-2018Assistant Professor, Kyungpook National University
  • · 2009-2012Research Associate, Theory of Condensed Matter Group, Cavendish Laboratory, University of Cambridge
  • · 2005-2009Research Associate, Institute for Theoretical Physics, Georg-August University of Goettingen
  • · 2001-2005Research Associate, Department of Theoretical Physics, Hahn-Meitner Institute

연구내용

Theoretical Physics of Soft and Biological Matter. I use analytical tools from statistical mechanics and field theory to study the structure and elasticity of (bio)polymers.

최근 5년간 주요논문

1. M. Razbin, P. Benetatos, A.A. Moosavi-Movahedi, A first-passage approach to the thermal breakage of a discrete one-dimensional chain, Soft matter 15 (11), 2469-2478 (2019)


2. S. Dutta, P. Benetatos, Inequivalence of fixed-force and fixed-extension statistical ensembles for a flexible polymer tethered to a planar substrate, Soft matter 14 (33), 6857-68661 (2018)


3. P. Benetatos, Tensile elasticity of semiflexible polymers with hinge defects, Physical Review E 96 (4), 0425023 (2017)


4. P. Benetatos, Y.S. Jho, Bundling in semiflexible polymers: A theoretical overview, Advances in colloid and interface science 232, 114-1267 (2016)


5. M. Razbin, P. Benetatos, A.  Zippelius, Elasticity of a semiflexible filament with a discontinuous tension due to a cross-link or a molecular motor, Physical Review E 93 (5), 0524086 (2016)


6. S. Dutta, P. Benetatos, Y.S. Jho, Bundle formation in parallel aligned polymers with competing interactions, EPL (Europhysics Letters) 114 (2), 280012 (2016)


7. M. Razbin, M. Falcke, P. Benetatos, A. Zippelius, Mechanical properties of branched actin filaments, Physical Biology 12 (4), 0460077 (2015)

연구실 소개

Research on condensed matter at KNU includes both "hard" and "soft" condensed matter physics. "Hard" matter refers to matter whose behavior is determined by interatomic forces, and quantum mechanics plays a prominent role. The study of crystals, metals, semiconductors, and superconductors falls in this category. "Soft" matter refers to materials whose behavior is intermediate between that of simple liquids and crystalline solids. Examples include polymers, colloids, liquid crystals, surfactants and most materials of biological origin. Living organisms are made of soft matter. These materials are literally "softer," exhibiting large responses to weak forces and being very sensitive to the geometry of the boundaries, thermal fluctuations, or the action of external fields. Contrary to "hard" matter where the macroscopic behavior is primarily determined by the energy of its elementary building blocks, in "soft" matter entropy plays an equally, if not more, important role as energy. In order to understand the structure and elasticity of soft/biological matter as a collective behavior on the basis of the geometry and interactions of its elementary constituents, we use the tools of statistical mechanics.


The current focus of research in my lab is the study of semiflexible polymers. Some important biopolymers, including DNA and the structural elements of the cytoskeleton (F-actin, microtubules, intermediate filaments) are semiflexible, that is, on a certain length scale, they behave as thermally fluctuating slender rods. This semiflexibility makes them markedly different from their flexible counterparts. The latter, which include most synthetic polymers (e.g., polystyrene), can be modeled as paths of random walkers (ideal coils). Semiflexibility, which is very important for their biological function, poses many challenges in their theoretical understanding. We study both single-molecule phenomena (e.g., force-extension relations) and the properties of assemblies of many polymers. An important part of our research is the theoretical analysis of networks of cross-linked polymers. We treat the constraints imposed by permanent random cross-links as quenched disorder (that is, disorder  frozen in time, which is markedly distinct from thermal disorder) using the tools of the statistical physics of disordered systems (replica field theory). Another topic of current interest is the emergence of order (self-organization) in brushes of semiflexible polymers with attractive interactions. The interplay between the opposing tendencies of the attraction to bring the chains closer together and of the permanent grafting to keep them in place results in the emergence of bundled states.


An area of of Physics where "soft" matter meets "hard" matter is the so-called vortex matter in type-II superconductors which here at KNU is studied experimentally in the "hard" condensed matter group. Vortex matter in high-Tc superconductors (flux-line states) can be viewed as soft matter embedded in hard matter. It is "soft" because it has rather small elastic moduli, it is very sensitive to thermal fluctuations (the Abrikosov lattice can undergo a melting transition), and quenched disorder can have a profound effect on its behavior yielding various glassy states. My background in condensed matter theory originated in the study of vortex matter and I still maintain an interest in it.