A5081278879- Liquid Crystal Research Advancements
- Photonic and Optical Devices
- Material Dynamics and Properties
- Advanced Fiber Laser Technologies
- Advanced Materials and Mechanics
- Plant Reproductive Biology
- Surfactants and Colloidal Systems
- Synthesis and Properties of Aromatic Compounds
- Photochemistry and Electron Transfer Studies
- Characterization and Applications of Magnetic Nanoparticles
- Molecular spectroscopy and chirality
- Vibration Control and Rheological Fluids
University of Hyderabad
2019-2024
The recent discovery of nematic liquid crystals with polar order (ferroelectric) has created immense interest. Despite intensive research, several physical properties this crystal are yet to be investigated and understood. Here, we report experimental studies on the surface alignment, birefringence, flexoelectric coefficient a $({N}_{\mathrm{F}})$ crystal. Our experiments directly reveal that splay fluctuations influence birefringence degrees above nonpolar $(N)$ phase transition...
A simple molecular design of unsymmetrical bent-core molecules exhibiting low layer shrinkage and a dip in the birefringence at SmA–SmC phase transition, typical characteristics “de Vries” liquid crystals.
Bent-core liquid crystals (BLCs) are a class of thermotropic LCs that exhibit chiral and polar superstructures in achiral molecules. Progress design synthesis novel bent-core architectures search unconventional properties enriched the field BLCs. Here, we present comprehensive review recent bent-shaped LCs, discuss relevant simulation theoretical models, which draws comparison to experimental results, survey advances molecular structure-property correlation, predict future directions from...
Twist-bend (N_{tb}) and ferroelectric (N_{F}) nematic liquid crystals exhibit several novel effects new physical properties. Here, we report experimental studies on the phase diagram some properties of binary mixtures CB9CB RM734 mesogens. Both N-N_{tb} N-N_{F} transition temperatures corresponding enthalpies decrease significantly and, eventually, these transitions disappear at intermediate compositions, stabilizing wide (N). Temperature-dependent birefringence degrees above shows strong...
In recent years, investigation on the non-display applications of liquid crystals has increased considerably. One emerging is whispering gallery mode (WGM) lasing. Here, we report experimental studies morphology and WGM lasing in nematic (N), smectic-A (SmA) smectic-C (SmC) microdroplets dispersed a highly transparent low refractive index perfluopolymer. The mesomorphic microdroplets, obtained by varying temperature, exhibit radial director configuration. SmA are found to be stable robust...
Nematic liquid crystals whose dielectric anisotropy changes sign above the crossover frequency are known as dual-frequency nematic (DFNLCs). Here, we report experimental studies on whispering gallery mode (WGM) optical resonance in fluorescent dye-doped DFNLC microdroplets. The microdroplets dispersed a phospholipid-doped glycerol, forming radial director structure. We investigate effect of amplitude and applied electric field morphology WGM resonance. show that can be tuned by changing at...
Twist-bend (Ntb) and ferroelectric (NF) nematic liquid crystals exhibit several novel effects new physical properties. The question of what happens in binary mixtures is interesting as a matter curiosity pure science. Here, we report experimental studies on the phase diagram some properties above-mentioned crystals. Both N-Ntb N-NF transition temperatures corresponding enthalpies decrease significantly eventually, these transitions disappear intermediate compositions. Temperature dependent...
The recent discovery of nematic liquid crystals with polar order (ferroelectric nematic) has created immense interest. Despite intensive research, several physical properties this crystal are yet to be investigated and understood. Here, we report experimental studies on the birefringence exoelectric coefficient a (NF) crystal. Our experiments directly reveal that splay fluctuations influence degrees above nonpolar (N) polar-nematic phase transition temperature heat capacity exponent obtained...