A. Gopinath

Multi-population dissolution in confined active fluids

The paper develops a computational method to model multi-population active fluids under confinement, showing hydrodynamic effects dominate dissolution dynamics in bacterial suspensions.

Lateral gating mechanism and plasticity of the BAM complex in micelles and E. coli

This study investigates the conformational dynamics of the BAM complex in micelles and E. coli, revealing that BamCDE regulates lateral gating in BamA.

Size dependent diffusion and dispersion of particles in mucin

This study investigates particle diffusion and dispersion in mucin solutions and mixed with rock dust, finding size-dependent diffusion and effects of heterogeneity and electrostatic interactions.

Facile determination of the Poisson's ratio and Young's modulus of polyacrylamide gels and polydimethylsiloxane

The paper presents a method to measure Poisson's ratio and Young's modulus of polyacrylamide gels and PDMS using tensile tests and compares results with shear rheology.

Natural and engineered isoforms of the inflammasome adaptor ASC form non-covalent, pH-responsive hydrogels

The paper demonstrates that natural and engineered ASC isoforms form non-covalent, pH-responsive hydrogels through self-assembly, revealing their potential for bioinspired material design.

Clots reveal anomalous elastic behavior of fiber networks

This study investigates the nonlinear elastic behavior of blood clots using microscopy, rheology, and an elastic network model, revealing how crosslinking and platelet contraction affect force propagation and mechanical response.

DNA nanopores as artificial membrane channels for origami based bioelectronics

The paper develops DNA nanopores integrated with bioprotonic contacts to create efficient artificial ion-channel interfaces for bioelectronic signal readout.

DNA origami 2.0

This study presents a method to grow silica shells on DNA origami structures, enhancing their stability while preserving their programmable features.

Effect of ambient fluid rheology on oscillatory instabilities in filament-motor systems

This study investigates how fluid rheology affects oscillatory instabilities in filament-motor systems using stability analysis and numerical simulations.

Ordering and topological defects in social wasps' nests

The paper analyzes the structural order and defects in social wasp nests, finding short-range hexagonal order and specific topological defects.

Effective elasticity and persistence of strain in active filament-motor assemblies

This study investigates the persistence length of strain in active filament-motor assemblies, finding it depends on passive elasticity and motor kinetics under different deformation conditions.

Glycosaminoglycans and glycoproteins influence the elastic response of synovial fluid nanofilms on model oxide surfaces

This study investigates how glycosaminoglycans and glycoproteins affect the elastic response of synovial fluid nanofilms on oxide surfaces, showing that film elasticity depends on component integrity.

How do biofilms feel their environment?

This study investigates how biofilms sense and respond to substrate stiffness using synthetic hydrogels and time-lapse microscopy, finding that biofilm growth increases with substrate stiffness.

Substrate mediated elastic coupling between motile cells modulates inter-cell interactions and enhances cell-cell contact

The paper builds a biophysical model to study how substrate deformation mediates cell-cell interactions and influences collective cell behavior during migration.

Flapping, swirling and flipping: Non-linear dynamics of pre-stressed active filaments

This study investigates the non-linear dynamics of pre-stressed active filaments under follower forces and fluid drag, revealing oscillatory instabilities and three-dimensional swirling patterns.

Synchronized oscillations, metachronal waves, and jammed clusters in sterically interacting active filament arrays

This study uses simulations to show that steric interactions and surface roughness in active filament arrays can generate synchronized oscillations, metachronal waves, and jammed clusters.

Low-cost, bottom-up fabrication of large-scale single-molecule nanoarrays by DNA origami placement

This paper introduces a low-cost method to create large-scale single-molecule nanoarrays using DNA origami and colloidal nanoparticles, achieving higher yield and enabling high-throughput deterministic assays.

Extensions of the worm-like-chain model to tethered active filaments under tension

The paper extends the worm-like-chain model to analyze tethered active filaments under tension, deriving force-extension relationships and mean square deflections under different boundary conditions.

Swarming bacterial fronts: Dynamics and morphology of active swarm interfaces propagating through passive frictional domains

The paper studies the dynamics and morphology of active-passive interfaces in swarming bacteria, finding unique surface roughness and growth exponents influenced by hydrodynamic and steric interactions.

Elastohydrodynamical instabilities of active filaments, arrays and carpets analyzed using slender body theory

This paper uses slender body theory to analyze the stability and dynamics of active filaments, arrays, and carpets under hydrodynamic interactions and follower forces.

Instabilities and Spatiotemporal Dynamics of Active Elastic Filaments

This study investigates the dynamic buckling instabilities of elastic filaments driven by tangential forces in the presence of obstacles or cargo, identifying two distinct instability states and their dynamics.

Filament extensibility and shear stiffening control persistence of strain and loss of coherence in cross-linked motor-filament assemblies

The paper investigates how filament extensibility and shear stiffening affect strain persistence and coherence loss in cross-linked motor-filament assemblies using theoretical and simulation approaches.

Quenching an active swarm: Effect of light exposure on collective motility in swarming Serratia marcescens colonies

This study examines how light exposure affects collective motility in swarming Serratia marcescens colonies, identifying conditions under which mobility is suppressed or reversed.

The propagation of active-passive interfaces in bacterial swarms

This study investigates how active-passive interfaces evolve in bacterial swarms, showing that their propagation is influenced by local swarm speed and curvature, analogous to classical interface theories.