Controlling Liquid Crystal Configuration and Phase Using Multiple Molecular Triggers

Linda M. Oster, Jake Shechter, Benjamin Strain, Manisha Shivrayan, Sankaran Thai Thayumanavan, Jennifer L. Ross

Research output: Contribution to journalArticlepeer-review

Abstract

Liquid crystals are able to transform a local molecular interaction into a macroscopic change of state, making them a valuable “smart” material. Here, we investigate a novel polymeric amphiphile as a candidate for molecular triggering of liquid crystal droplets in aqueous background. Using microscopy equipped with crossed polarizers and optical tweezers, we find that the monomeric amphiphile is able to trigger both a fast phase change and then a subsequent transition from nematic to isotropic. We next include sodium dodecyl sulfate (SDS), a standard surfactant, with the novel amphiphilic molecules to test phase transitioning when both were present. As seen previously, we find that the activity of SDS at the surface can result in configuration changes with hysteresis. We find that the presence of the polymeric amphiphile reverses the hysteresis previously observed during such transitions. This work demonstrates a variety of phase and configuration changes of liquid crystals that can be controlled by multiple exogenous chemical triggers.

Original languageEnglish (US)
Article number878
JournalMolecules
Volume27
Issue number3
DOIs
StatePublished - Feb 1 2022

Keywords

  • Emulsions
  • Liquid crystals
  • Rod-shaped molecules

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry (miscellaneous)
  • Molecular Medicine
  • Pharmaceutical Science
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry

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