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Related Concept Videos

Contact Angle01:13

Contact Angle

When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive force...

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Updated: May 14, 2026

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

Introduction to optical methods for characterizing liquid crystals at interfaces.

Daniel S Miller1, Rebecca J Carlton, Peter C Mushenheim

  • 1Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States.

Langmuir : the ACS Journal of Surfaces and Colloids
|January 26, 2013
PubMed
Summary
This summary is machine-generated.

This review explains optical methods to measure liquid crystal (LC) orientations and anchoring energies at various interfaces. These techniques are accessible for students studying LC behavior at solid, aqueous, and biomolecular surfaces.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Soft Matter Physics

Background:

  • Liquid crystals (LCs) exhibit complex interfacial behavior crucial for device applications.
  • Understanding LC orientation and anchoring at interfaces is essential for controlling material properties.

Purpose of the Study:

  • To provide an instructional overview of methods for characterizing LC orientations and anchoring energies at interfaces.
  • To make these fundamental studies accessible to nonexpert readers, including students.

Main Methods:

  • Focus on widely available optical methods for characterizing LC interfaces.
  • Describes techniques applicable to solid, aqueous, planar, and nonplanar interfaces.
  • Enables studies at polymeric, chemically functionalized, and biomolecular interfaces.

Main Results:

  • Detailed description of optical methods for quantifying LC orientation.
  • Explanation of how to measure the strength of LC anchoring at interfaces.
  • Demonstration of method applicability across diverse interface types.

Conclusions:

  • Optical methods offer a versatile and accessible approach to studying LC interfacial phenomena.
  • This review equips students and researchers with the knowledge to investigate LC ordering at various interfaces.
  • The described techniques facilitate fundamental understanding of LC-biomolecular and LC-polymeric interactions.