Research Interests

As an experimental soft matter physicist with postdoctoral experience in microbial ecology and active matter, I enjoy working at the interface of physics and biology. At present, I am particularly interested in studying the interactions between active and passive soft matter from the perspective of nonequilibrium self-assembly and information processing. My journey in science thus far, is chronicled below.

Soft Matter Physics
My doctoral research focused on using dense colloidal suspensions as model systems to gain a microscopic understanding of equilibrium as well as non-equilibrium phenomena commonly observed in atomistic solids and liquids. In particular, using suitable combinations of experimental techniques such as optical and confocal microscopy, rheometry and holographical optical tweezers, I studied various dynamical phenomena associated with grain boundary interface fluctuations in polycrystalline materials as well as glass formation. Click on the images below to visit some of my key papers or take a look at my review articles on grain bounday dynamics and the glass transition, which I have co-authored with my doctoral advisers.

Random Pinning Colloidal Glass Transition (Nature Commun., 2014)

Random Pinning Colloidal Glass Transition (Nature Communications, 2014)

Ellipsoid_featured

Dynamical facilitation in suspensions of colloidal ellipsoids (PNAS, 2014)

Growing amorphous order in glass-forming liquids (Nature Physics, 2015)

Growing amorphous order in glass-forming liquids (Nature Physics, 2015)

Microbial ecology:
As a postdoc in the Gore lab, I have I studied the influence of migration on the oscillatory population dynamics of laboratory co-cultures of ampicillin-resistant and chloramphenicol-resistant strains of E. coli. In an environment containing both antibiotics, the co-culture exhibits an obligatory cross-protection mutualism in which each strain protects its partner by deactivating one of the antibiotics. Using batch culture daily dilution experiments as well as simulations of a differential equation-based model of antibiotic deactivation, we showed that intermediate levels of migration disturb the period of oscillations and lead to enhanced survival of co-cultures in harsh environments. This work has been published in Nature Communications.

Active matter: As a PLS fellow at MIT, I have been combining my doctoral interests in soft matter with postdoctoral interests in biophysics. Currently, in collaboration with Prof. Nikta Fakhri and her graduate student Junang Li in the MIT Physics of Living Systems group, I am working on a series of experiments on the physics of active matter. We have recently shown that motile bacteria induce effective attractions between passive colloids, resulting in dynamic clustering (arXiv:2110.02294, 2021). I have also investigated odd elasticity in living chiral crystals of starfish embryos in collaboration with the groups of Prof. Fakhri and Prof. Jörn Dunkel (arXiv:2105.07507).