32 citations · 119 across the 16 of their papers we have counts for
17 papers
Mixing Twist-Bend and Ferroelectric nematic liquid crystals
Abinash Barthakur, Jakub Karcz, Przemyslaw Kula +1
Twist-bend (Ntb) and ferroelectric (NF) nematic liquid crystals exhibit several novel effects and new physical properties. The question of what happens in binary mixtures is intere…
Light-responsive nematic colloids and colloidal crystals
Devika Venkuzhy Sudhakaran, Dinesh Kumar Sahu, Osamu Haba +1
Rational control over the periodic arrangement of particles by means of external stimuli is a technologically important aspect of colloidal science with important physical underpin…
Critical splay fluctuations and colossal flexoelectric effect above non-polar to polar nematic phase transition
Abinash Barthakur, Jakub Karcz, Przemyslaw Kula +1
The recent discovery of nematic liquid crystals with polar order (ferroelectric nematic) has created immense interest. Despite intensive research, several physical properties of th…
Giant electroviscous effects in a ferroelectric nematic liquid crystal
M. Praveen Kumar, Jakub Karcz, Przemyslaw Kula +2
The electroviscous effect deals with the change in the viscosity of fluids due to an external electric field. Here, we report experimental studies on the electroviscous effects in…
Nontrivial electrophoresis of silica micro and nanorods in a nematic liquid crystal
Muhammed Rasi M, Archana S, Ravi Kumar Pujala +1
We study DC and AC electrophoresis of silica micro and nanorods in a thin film of a nematic liquid crystal. These particles induce virtual topological defects and also demonstrate…
Defect-polymorphism controlled electrophoretic propulsion of anisometric microparticles in a nematic liquid crystal
Devika V S, Dinesh Kumar Sahu, Ravi Kumar Pujala +1
Nontrivial shape of colloidal particles create complex elastic distortions and topological defects in liquid crystals and play a key role in governing their electrophoretic propuls…
Electrophoresis of metal-dielectric Janus particles with dipolar director symmetry in nematic liquid crystals
Dinesh Kumar Sahu, Surajit Dhara
We study electrophoretic mobility of metal-dielectric Janus particles with dipolar director profile in two nematic liquid crystals (LCs) having same (positive) conductivity anisotr…
Dynamics of a sheared twist bend nematic liquid crystal
M. Praveen Kumar, Jakub Karcz, Przemyslaw Kula +1
We study the flow behaviour of a twist-bend nematic liquid crystal. It shows three distinct shear stress () responses in a certain range of temperatures and shear rat…
Topological phase transitions in 2-dimensional bent-core liquid crystal models
B. Kamala Latha, Surajit Dhara, V. S. S. Sastry
Spontaneous onset of a low temperature topologically ordered phase in a 2-dimensional (2D) lattice model of uniaxial liquid crystal (LC) was debated extensively pointing to a suspe…
Electric field driven controllable motility of metal-dielectric Janus particles with boojum defects in a nematic liquid crystal
Dinesh Kumar Sahu, Surajit Dhara
In a sharp contrast to the response of silica particles we show that the metal-dielectric Janus particles with boojum defects in a nematic liquid crystal are self-propelled under t…
Interactions of charged microrods in chiral nematic liquid crystals
Muhammed Rasi M, Ravi Kumar Pujala, Sathyanarayana Paladugu +1
We study the pair interaction of charged silica microrods in chiral nematic liquid crystals and show that the microrods with homeotropic surface anchoring form a bound state due to…
A novel method for measuring electric field induced dipole moments of metal-dielectric Janus particles in nematic liquid crystals
Dinesh Kumar Sahu, Surajit Dhara
Janus particles are special types of nano or micro particles possessing at least two surfaces with distinct physical or chemical properties. The most studied Janus particles are th…
Smectic-like rheology and pseudo-layer compression elastic constant of a twist-bend nematic liquid crystal
M. Praveen Kumar, P. Kula, Surajit Dhara
In twist-bend nematic (N\textsubscript{TB}) liquid crystals (LCs), the mean molecular orientation exhibits heliconical structure with nanoscale periodicity. On the mesoscopic scale…
Studies on binary mixtures of nematic liquid crystals made of strongly polar molecules with identical cores and antagonistic orientation of permanent dipoles
Dasari Venkata Sai, Tae Hoon Yoon, Surajit Dhara
We report experimental studies on optical (birefringence, ), dielectric and bend-splay elastic anisotropies ( of a few mixtures of two nemat…
Microrheology to Probe Smectic Clusters in Bent-core Nematic Liquid Crystals
Sathyanarayana Paladugu, Supreet Kaur, Golam Mohiuddin +3
Many bent-core nematic liquid crystals exhibit unusual physical properties due to the presence of smectic clusters, known as "cybotactic" clusters in the nematic phase. Effect of t…
Orientation Dependent Interaction and Self-assembly of Cubic Magnetic Colloids in a Nematic Liquid Crystal
Devika V S, Ravi Kumar Pujala, Surajit Dhara
Spherical microparticles dispersed in nematic liquid crystals have been extensively investigated in the past years. Here, we report experimental studies on the elastic deformation,…
Omnidirectional transport and navigation of Janus particles through a nematic liquid crystal film
Dinesh Kumar Sahu, Swapnil Kole, Sriram Ramaswamy +1
We create controllable active particles in the form of metal-dielectric Janus colloids which acquire motility through a nematic liquid crystal film by transducing the energy of an…