Pragnya Satapathy

Pragnya Satapathy
Centre for Nano and Soft Matter Sciences · Department of Physics

Doctor of Philosophy

About

13
Publications
1,655
Reads
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70
Citations
Citations since 2017
13 Research Items
70 Citations
20172018201920202021202220230510152025
20172018201920202021202220230510152025
20172018201920202021202220230510152025
20172018201920202021202220230510152025

Publications

Publications (13)
Article
Liquid crystals have served as model materials for observing re-entrant phases, now known among a plethora of condensed matter systems spanning from superconductors to proteins. Sadashiva synthesised the organic compounds for the work from Raman Research Institute that laid the claim for having observed a re-entrant nematic in a single component ma...
Article
We demonstrate that dispersing a small amount of CdSeS gradient quantum dots (QDs)in a nematic liquid crystal and geometrically confining the nanocompositein a polymer network leads to their ordered linear assembly, as observed through electron microscopy. Such an orientational order not only enhances the base photoluminescence (PL), but brings in...
Article
Better NIR (near infrared)-driven photomechanical actuation than reported for films containing carbon nanostructures such as carbon nanotubes and graphene has been achieved by incorporating porous carbon nanoparticles (PCNs) into single-layer films of polydimethylsiloxane (PDMS). The PCNs being obtained from a bio-waste source adds an exciting dime...
Article
Full-text available
A polymer stabilized liquid crystal (PSLC) system formed by a nematic contained in a biopolymer network of cellulose nanocrystals, exhibiting many attractive features, is demonstrated. The threshold or the minimum voltage needed to operate the electro-optic device does not depend on the concentration of the polymer, a feature that is in contrast to...
Article
We demonstrate that the photoluminescence in nanocomposites comprising gradient CdSeS quantum dots (QD) doped in a host nematic liquid crystal (LC) can be substantially modulated due to photoisomerization of small amounts of an incorporated azobenzene‐based LC material. An attractive feature of this reversible second‐wavelength optical control is t...
Article
Full-text available
We report photophysical properties of a nanocomposite consisting of perovskite quantum cuboids (QCs) formed by CsPbBr3 and a wide temperature range nematic liquid crystal. Contrary to observations made with conventional II-VI quantum dots dispersed in a liquid crystal, the used QCs form, under the influence of the nematic orientation, linear assemb...
Article
Thermochromic materials are generally synthesized via high temperature melting reaction or solution‐based synthesis. Herein, all‐inorganic thermochromic compounds of (Ag1‐xCux)2HgI4 were synthesized by solvent‐free simple and scalable mechanochemical grinding at room temperature. Temperature‐dependent electronic absorption spectra along with DSC th...
Article
Fast electrically switchable anisotropic photoluminescence from a nano‐soft composite comprising a nematic liquid crystal (LC) and quantum cuboids of a cesium lead halide perovskite is reported. The magnitude of the anisotropy in emission appears to be dictated by the anisotropy of the LC and the capability of the cuboids to form a linear chain, th...
Article
Full-text available
Bent-core liquid crystals (LCs) introduced a whole new dimension to the science of LCs. Besides re-emphasizing the importance of the shape of the molecule, they brought in phases with symmetry, not known earlier. Another sub-class of systems that is emerging is that of soft-bent molecules. In contrast with the bent-core molecules, here the bend is...
Article
Full-text available
An extensive study of the effect of terminal halogens on the structure-property relationship in three series of polar short-core hockey-stick shaped or L-shaped mesogens has been elucidated. The behaviour of the halogens at the tip of the short arm and the role of end alkyl chain at the long arm on the phase structure of the mesogens have been char...
Article
We report the influence of photoisomerization on a guest-host composite comprising a soft-bent dimer exhibiting the presently sought-after twist-bend nematic (NTB) phase, doped with small amounts of a calamitic photoactive azobenzene-based dimer that assumes a bent shape when photo-driven. Trans-cis photoisomerization of the latter compound leads t...

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Projects

Project (1)
Project
Study of structure-property relationship in short-core BLCs (bent liquid crystals)