Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

The Fluid Mosaic Model01:34

The Fluid Mosaic Model

157.4K
The fluid mosaic model was first proposed as a visual representation of research observations. The model comprises the composition and dynamics of membranes and serves as a foundation for future membrane-related studies. The model depicts the structure of the plasma membrane with a variety of components, which include phospholipids, proteins, and carbohydrates. These integral molecules are loosely bound, defining the cell’s border and providing fluidity for optimal function.
157.4K
Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model01:09

Theories of Dissolution: The Danckwerts' Model and Interfacial Barrier Model

937
Various dissolution theories provide insight into the factors that influence the dissolution rate. Danckwerts' Model suggests that turbulence, rather than a stagnant layer, characterizes the dissolution medium at the solid-liquid interface. In this model, the agitated solvent contains macroscopic packets that move to the interface via eddy currents, facilitating the absorption and delivery of the drug to the bulk solution. The regular replenishment of solvent packets maintains the...
937
Fluid Mosaic Model01:19

Fluid Mosaic Model

14.6K
Scientists identified the plasma membrane in the 1890s and its principal chemical components (lipids and proteins) by 1915. The model for plasma membrane structure, proposed in 1935 by Hugh Davson and James Danielli, was the first model to be widely accepted in the scientific community. The model was based on the plasma membrane's "railroad track" appearance in early electron micrographs. Davson and Danielli theorized that the plasma membrane's structure resembled a sandwich...
14.6K
Phase Transitions: Vaporization and Condensation02:39

Phase Transitions: Vaporization and Condensation

16.9K
The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
16.9K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Periodic Feature Characterization in Nanostructured Surfaces and Emulsions.

Langmuir : the ACS journal of surfaces and colloids·2025
Same author

Cholesteric liquid crystal roughness models: from statistical characterization to inverse engineering.

Soft matter·2025
Same author

Liquid-liquid crystalline phase separation of filamentous colloids and semiflexible polymers: experiments, theory and simulations.

Reports on progress in physics. Physical Society (Great Britain)·2025
Same author

Geometry-structure models for liquid crystal interfaces, drops and membranes: wrinkling, shape selection and dissipative shape evolution.

Soft matter·2023
Same author

Atomistic-geometry inspired structure-composition-property relations of hydrogen sII hydrates.

Scientific reports·2023
Same author

A coarse-grained molecular model of amyloid fibrils systems.

Soft matter·2023

Related Experiment Video

Updated: May 2, 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

6.4K

Dynamic wetting model for the isotropic-to-nematic transition over a flat substrate.

Alejandro D Rey1, E E Herrera-Valencia

  • 1Department of Chemical Engineering, McGill University, 3610 University Street, H3A2B2, Montreal, QC, Canada. alejandro.rey@mcgill.ca edtson.herreravalencia@mail.mcgill.ca.

Soft Matter
|March 22, 2014
PubMed
Summary

This study analyzes the isotropic-to-nematic phase transition in liquid crystal (LC) drops on solid surfaces. It reveals a constant dynamic contact angle and contact line speed dependent on undercooling, enhancing LC-substrate interface characterization.

More Related Videos

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

5.7K
Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.2K

Related Experiment Videos

Last Updated: May 2, 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

6.4K
High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

5.7K
Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
11:51

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions

Published on: February 22, 2018

8.2K

Area of Science:

  • Soft matter physics
  • Materials science
  • Chemical engineering

Background:

  • Phase ordering on substrates is crucial for soft material transformations, involving wetting, anchoring, and phase transition kinetics.
  • Understanding the isotropic-to-nematic phase transition in liquid crystals (LCs) on solid surfaces is essential for material applications.

Purpose of the Study:

  • To analyze the kinetics of the isotropic-to-nematic isothermal phase transition in a growing spherical LC drop on a flat solid surface.
  • To develop a tractable surface phase transition kinetic model and extract the advancing dynamic contact angle and contact line speed.
  • To identify elastic and wetting parameters governing the phase transformation process.

Main Methods:

  • Utilized the Landau-de Gennes Q-tensor order parameter equations to model the phase transition kinetics.
  • Derived interface and contact line force balances, ensuring consistency with generic models of conservative interface and contact line motions.
  • Extracted the advancing dynamic contact angle equation from kinematic compatibility between the moving interface and contact line.

Main Results:

  • Developed a tractable surface phase transition kinetic model yielding a constant advancing dynamic contact angle (θ) and contact line speed as a function of undercooling (ΔT).
  • Demonstrated that increasing undercooling causes the surface phase transition to approach the bulk phase transition, with θ approaching π.
  • Identified key elastic and wetting parameters controlling the phase transformation and proposed experiments for their determination.

Conclusions:

  • The dynamic wetting and surface phase transition model expands characterization methods for LC-substrate interfaces beyond static droplet methods.
  • The findings provide insights into the fundamental physics of phase transitions in confined geometries.
  • The identified parameters and experimental definitions facilitate precise control and understanding of LC-substrate interactions.