Interaction of chiral carbon dots with the lamellar and hexagonal phase of lyotropic liquid crystals

Kumar, Ranjesh (2022) Interaction of chiral carbon dots with the lamellar and hexagonal phase of lyotropic liquid crystals. Masters thesis, Indian Institute of Science Education and Research Kolkata.

Text (MS dissertation of Ranjesh Kumar (17MS029)) 17MS029_Thesis_file.pdf - Submitted Version Restricted to Repository staff only Download (1MB)

Abstract

Carbon quantum dots (CQDs) are a new class of nanomaterials that is composed of carbon nanoparticles. CQDs show fluorescence properties and show better photostability and lower toxicity compared to the traditional fluorescent dyes and heavy metals containing QDs. Achiral CQDs synthesized by m-PDA and CA (citric acid) in equal molar ratio. Chiral CQDs are synthesized by using a chiral precursor (L/D cysteine). CQDs have a spherical structure that is characterized by spectroscopy and microscopy techniques. we have tried with the luminescent CQDs as reporter for studying the properties of the different phases of LLCs prepared from sodium dodecyl sulphate (SDS). Along with this, we intended to study the effect of the different phases of the LLCs on the chirality modulation of the CQDs. Lyotropic liquid crystalline (LLC) mesophase forms by dissolving an amphiphilic molecule in a suitable solvent under appropriate conditions of concentration, temperature and pressure. LLCs phase both Lamellar and Hexagonal prepared by sodium dodecyl sulphate (SDS) surfactant in aqueous (water) at a cheaper rate and then characterized by microscopy technique. The interaction between the achiral and the chiral CQDs with the lamellar and the hexagonal phases of LLCs. The effect of the imposition of chirality to the achiral CQDs which adsorb to the LLC surface has never been studied before. The various steps in this interaction were monitored spectroscopically and microscopically.

Actions (login required)

View Item