ArticleProceedings of the National Academy of Sciences of the United States of America2017
Using chiral tactoids as optical probes to study the aggregation behavior of chromonics.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Remodeling and self-healing of individual amyloid tactoids via multiphoton absorption.Nature communications · 2025Article
- Sunset Yellow Confined in Curved Geometry: A Microfluidic Approach.Langmuir : the ACS journal of surfaces and colloids · 2023Article
- Dynamic and reversible shape response of red blood cells in synthetic liquid crystals.Proceedings of the National Academy of Sciences of the United States of America · 2020Article
- Six-fold director field configuration in amyloid nematic and cholesteric phases.Scientific reports · 2019Article
- Article
- Liquid crystalline tactoids: ordered structure, defective coalescence and evolution in confined geometries.Philosophical transactions. Series A, Mathematical, physical, and engineering sciences · 2018Review
- Stimuli-responsive hydroxyapatite liquid crystal with macroscopically controllable ordering and magneto-optical functions.Nature communications · 2018Article
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5 authors.
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Abstract
Tactoids are nuclei of an orientationally ordered nematic phase that emerge upon cooling the isotropic phase. In addition to providing a natural setting for exploring chromonics under confinement, we show that tactoids can also serve as optical probes to delineate the role of temperature and concentration in the aggregation behavior of chromonics. For high concentrations, we observe the commonly reported elongated bipolar tactoids. As the concentration is lowered, breaking of achiral symmetry in the director configuration is observed with a predominance of twisted bipolar tactoids. On further reduction of concentration, a remarkable transformation of the director configuration occurs, wherein it conforms to a unique splay-minimizing configuration. Based on a simple model, we arrive at an interesting result that lower concentrations have longer aggregates at the same reduced temperature. Hence, the splay deformation that scales linearly with the aggregate length becomes prohibitive for lower concentrations and is relieved via twist and bend deformations in this unique configuration. Raman scattering measurements of the order parameters independently verify the trend in aggregate lengths and provide a physical picture of the nematic-biphasic transition.
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