Prof Moses J Kartha's Talk

Apr 11, 2019 - 17:00

Apr 11, 2019 - 18:00

Room 118, Chemical Engg Dept

Seminars

Moses J Kartha, Department of Physics, Savitribai Phule Pune University

Abstract: Recent advances in particles synthesis lead to the fabrication of nanometer-to-micrometer sized particles that can interacts each other via patches having anisotropic interactions. These particles are called ‘Patchy colloids’. In this talk I discuss how the patchy interactions lead to a non-equilibrium phase transitions observed in well-known surface growth models like ballistic deposition (BD) and diffusion-limited aggregation (DLA). Moreover, we identify that such phase transition belong to the well-known directed percolation (DP) universality class. Also in Patchy-DP problem, how bond probability can be replaced by patch probability of patchy particles. Interestingly, such systems also show a non-equilibrium phase transition like DP with shift in critical value of probability. The applicability of such patchy-DP model is identified for the existence of a robust virus structure.Final discussion is focused on how visibility Graphs (VG) can be used to understand the morphological phase transition observed in BD with patchy particles and in understanding 2d surface structures having same surface roughness with different surface morphology. Bio: Moses J Kartha completed his Post-Graduation in Physics from School of Pure and Applied Physics, Mahatma Gandhi University, Kerala. He completed M. Phil. Physics from Department of Physics, Savitribai Phule Pune university under the guidance of Dr. Ahmed Sayeed. Later he continued as a Ph.D Scholar under the guidance of Dr. Ahmed Sayeed and Dr. Arun G. Banpurkar and submitted his Ph.D Thesis entitled “Computational study of Non-equilibrium growth models and their application to aggregation of Patchy Particles”. During his Ph.D. work they were first able to show a directed percolation with patchy particles. Presently he is working as visiting faculty in Department of Physics, Government College of Engineering, Karad. The research area includes Soft Condensed Matter, Aggregation of Patchy Particles, Monte-Carlo Simulations for Equilibrium and Non-equilibrium systems, Interface Growth of Thin Films, Growth on Rough Substrates, Membrane Dynamics. This seminar is compulsory for students registered for course CL 702 or CL 704.