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Materials Research Institute



Special Seminar - 'Tunable many-body interactions and Particle-Resolved Phase Identification', with Prof. Stanislav Yurchenko'

Image: Prof Stanislav Yurchenko
Prof Stanislav Yurchenko

Date: 2 February 2018   Time: 16:00 - 17:00

We recently proposed a method [1] for phase identification in two-dimensional (2D) condensable systems on the basis of the analysis of the Voronoi cells’ characteristics. A simple algorithm is developed for determination of particles belonging to a condensate, a gaseous state, and an interface between them (i. e. surface). The efficiency and stability of the developed method is studied using molecular dynamics simulations and calculation of binodals in 2D systems with both short- and long-range attraction between particles. To illustrate prospectives of the method for experimental studies, 2D clusters of 2.12 ?m diameter colloidal silica particles assembled in a rotating external electric field have been analyzed using the the proposed method. The results show that the proposed method can be applied to analysis of simulation data (obtained by molecular dynamics or Monte Carlo methods) and results of particle-resolved experimental studies (with colloidal suspensions and complex (dusty) plasmas) of solids and liquids when the considered multiparticle systems can undergo spinodal decomposition. The developed method can be generalized to analyze three-dimensional and multicomponent systems, and therefore, the presented results are of relevance for a broad range of problems in physical chemistry, chemical physics, and materials science.

1. "Particle-Resolved Phase Identification in Two-Dimensional Condensable Systems", Pavel V. Ovcharov, Nikita P. Kryuchkov, Kirill I. Zaytsev, and Stanislav O. Yurchenko, The Journal of Physical Chemistry C 2017 121 (48), 26860-26868, DOI: 10.1021/acs.jpcc.7b09317

Location:  Arts One Lecture Theatre, Queen Mary University of London, Mile End Road, London E1 4NS
Contact:  Dr Andrei V Sapelkin