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    Ben May Center for Chemical Theory and Computation, lecture

    Date:
    02
    Thursday
    April
    2020
    Lecture / Seminar
    Time: 14:00
    Title: Statistical Mechanics of Interfaces: Still a Challenge?
    Location: Gerhard M.J. Schmidt Lecture Hall
    Lecturer: Prof. Kurt Binder
    Organizer: Department of Chemical and Biological Physics
    Abstract: Basic concepts related to interfaces between coexisting phases in thermal equili ... Read more Basic concepts related to interfaces between coexisting phases in thermal equilibrium can be traced back to the classic work of Gibbs, van der Waals, Landau, Cahn and Hilliard. Yet, these concepts still pose problems that are not well understood. The concept of an (intrinsic) interfacial profile is a key one for computing the interfacial free energy, but turns out to be ill-defined due to the inherent difficulties in separating the intrinsic profile from capillary wave broadening. A related problem is the failure of the idea of a free energy of homogeneous states inside the two-phase coexistence region in systems with short range forces. These difficulties can be avoided by computer simulation methods. Yet, the latter suffer from subtle finite size effects, which will be demonstrated in this lecture by extensive Monte Carlo simulations for 2D and 3D Ising models. It will be shown that one can understand them in terms of fluctuation phenomena associated with interfaces, such as translational degrees of freedoms of domains and "domain breathing". Correcting for these finite size effects, one can obtain accurate estimates for interfacial free energies, also for off-lattice models of fluids. Finally, it will be demonstrated that these concepts can be carried over to the study of curved interfaces (of droplets or bubbles, respectively), allowing the estimation of Tolman's length.
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    Mini-symposium on phase separation in cells

    Date:
    13
    Monday
    January
    2020
    Conference
    Time: 08:00
    Location: David Lopatie Conference Centre

    Ben May Center for Chemical Theory and Computation, Inaugural lecture

    Date:
    22
    Sunday
    September
    2019
    Lecture / Seminar
    Time: 11:00
    Title: Trick with Bricks: Complex self-assembly comes of age
    Location: Gerhard M.J. Schmidt Lecture Hall
    Lecturer: Prof Daan Frenkel
    Organizer: Department of Chemical and Biological Physics
    Abstract: A holy grail of nano-technology is to create truly complex, multi-component stru ... Read more A holy grail of nano-technology is to create truly complex, multi-component structures by self-assembly. Most self-assembly has focused on the creation of "structural complexity". In my talk, I will discuss "Addressable Complexity": the creation of structures that contain hundreds or thousands of distinct building blocks that all have to find their place in a 3D structure. Experiments on “DNA bricks” have demonstrated the feasibility of making such structures. Simulation and theory yield surprising insights that suggest design principles for brick structures. Interestingly, the design principles are different for DNA origami.
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