• Editors' Suggestion

Phases and structures of sunset yellow and disodium cromoglycate mixtures in water

Akihiro Yamaguchi, Gregory P. Smith, Youngwoo Yi, Charles Xu, Silvia Biffi, Francesca Serra, Tommaso Bellini, Chenhui Zhu, and Noel A. Clark
Phys. Rev. E 93, 012704 – Published 12 January 2016

Abstract

We study phases and structures of mixtures of two representative chromonic liquid crystal materials, sunset yellow FCF (SSY) and disodium cromoglycate (DSCG), in water. A variety of combinations of isotropic, nematic (N), and columnar (also called M) phases are observed depending on their concentrations, and a phase diagram is made. We find a tendency for DSCG-rich regions to show higher-order phases while SSY-rich regions show lower-order ones. We observe uniform mesophases only when one of the materials is sparse in the N phases. Their miscibility in M phases is so low that essentially complete phase separation occurs. X-ray scattering and spectroscopy studies confirm that SSY and DSCG molecules do not mix when they form chromonic aggregates and neither do their aggregates when they form M phases.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 14 November 2015
  • Revised 17 December 2015

DOI:https://doi.org/10.1103/PhysRevE.93.012704

©2016 American Physical Society

Physics Subject Headings (PhySH)

Polymers & Soft Matter

Authors & Affiliations

Akihiro Yamaguchi1, Gregory P. Smith1, Youngwoo Yi1, Charles Xu2,*, Silvia Biffi3, Francesca Serra3, Tommaso Bellini3, Chenhui Zhu4, and Noel A. Clark1,†

  • 1Soft Materials Research Center, University of Colorado, Boulder, Colorado 80309, USA
  • 2Fairview High School, Boulder, Colorado 80305, USA
  • 3Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Università degli Studi di Milano, Italy
  • 4Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

  • *Present address: Institute for Quantum Information and Matter, Caltech, Pasadena, CA 91125, USA.
  • Corresponding author: noel.clark@colorado.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 93, Iss. 1 — January 2016

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review E

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×