303 citations · 978 across the 10 of their papers we have counts for
10 papers
Structuring Stress for Active Materials Control
Rui Zhang, Steven A. Redford, Paul V. Ruijgrok +8
Active materials are capable of converting free energy into mechanical work to produce autonomous motion, and exhibit striking collective dynamics that biology relies on for essent…
Performance limitation of Si Nanowire solar cells: Effects of nanowire length and surface defects
Deepika Bora, Shrestha Bhattacharya, Nitin Kumar +6
In Si nanowire (SiNW) solar cells enhanced light confinement property in addition to decoupling of charge carrier collection and light absorption directions plays a significant rol…
Tunable structure and dynamics of active liquid crystals
Nitin Kumar, Rui Zhang, Juan J. de Pablo +1
Active materials are capable of converting free energy into directional motion, giving rise to striking dynamical phenomena. Developing a general understanding of their structure i…
Trapping and sorting active particles: motility-induced condensation & smectic defects
Nitin Kumar, Rahul Kumar Gupta, Harsh Soni +2
We present an experimental realization of the collective trapping phase transition [Kaiser et al., PRL 108, 268307 (2012)], using motile polar granular rods in the presence of a V-…
Interplay of Structure, Elasticity and Dynamics in Actin-Based Nematic Materials
Rui Zhang, Nitin Kumar, Jennifer Ross +2
Achieving control and tunability of lyotropic materials has been a long-standing goal of liquid crystal research. Here we show that the elasticity of a liquid crystal system consis…
Sorting motile rods by activity
Nitin Kumar, Harsh Soni, Rahul Kumar Gupta +2
We show, through experiments and simulations, that geometrically polar granular rods, rendered active by the transduction of vertical vibration, undergo a collective trapping phase…
Anisotropic Isometric Fluctuation Relations in experiment and theory on a self-propelled rod
Nitin Kumar, Harsh Soni, Sriram Ramaswamy +1
The Isometric Fluctuation Relation (IFR) [P.I. Hurtado et al., PNAS 108, 7704 (2011)] relates the relative probability of current fluctuations of fixed magnitude in different spati…
Flocking at a distance in active granular matter
Nitin Kumar, Harsh Soni, Sriram Ramaswamy +1
The self-organised motion of vast numbers of creatures in a single direction is a spectacular example of emergent order. We recreate this phenomenon using actuated non-living compo…
Oscillatory settling in wormlike-micelle solutions: bursts and a long time scale
Nitin Kumar, Sayantan Majumdar, Aditya Sood +3
We study the dynamics of a spherical steel ball falling freely through a solution of entangled wormlike-micelles. If the sphere diameter is larger than a threshold value, the settl…
Symmetry properties of the large-deviation function of the velocity of a self-propelled polar particle
Nitin Kumar, Sriram Ramaswamy, A. K. Sood
A geometrically polar granular rod confined in 2-D geometry, subjected to a sinusoidal vertical oscillation, undergoes noisy self-propulsion in a direction determined by its polari…