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

Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

27.8K
Surface Tension
The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
27.8K
Surface Tension of Fluid01:22

Surface Tension of Fluid

279
Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies...
279
Capillarity in Fluid01:19

Capillarity in Fluid

202
Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
202
Types of Fluids01:27

Types of Fluids

246
Fluids can be classified into Newtonian and non-Newtonian fluids based on their response to shear stress. Newtonian fluids have a linear relationship between shear stress and the shear strain rate, following Newton's law of viscosity. Their viscosity remains constant regardless of the shear rate, making their behavior predictable and easier to analyze. Common examples include water, air, oil, and gasoline.
In contrast, non-Newtonian fluids do not follow Newton's law of viscosity, and...
246
Colloidal precipitates01:09

Colloidal precipitates

576
The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
576
Colloids03:22

Colloids

17.5K
Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...
17.5K

You might also read

Related Articles

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

Sort by
Same author

Bridging Liquid and Elastic Solid Impact Regimes Using Flexible Hydrogels.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Ecotypes of triple-negative breast cancer in response to chemotherapy.

Nature·2026
Same author

Spontaneous Coulomb fissions of drops on lubricated surfaces.

Proceedings of the National Academy of Sciences of the United States of America·2026
Same author

Biomarkers of Diabetic Macular Edema on Optical Coherence Tomography After Cataract Surgery.

Journal of vitreoretinal diseases·2026
Same author

Evaluating the Accuracy and Educational Potential of Generative AI Models in Pharmacy Education: A Comparative Analysis of ChatGPT and Gemini Across Bloom's Taxonomy.

Pharmacy (Basel, Switzerland)·2026
Same author

Radiolabeling of CHX-A″-DTPA-Antibody Conjugates with [<sup>89</sup>Zr]ZrCl<sub>4</sub>.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine·2025

Related Experiment Video

Updated: Jun 30, 2025

Challenges in Rheological Characterization of Highly Concentrated Suspensions &#8212; A Case Study for Screen-printing Silver Pastes
08:42

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

20.0K

Unsteady wetting of soft solids.

Quoc Vo1, Surjyasish Mitra2, Marcus Lin3

  • 1School of Mechanical & Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639708, Singapore; Division of Pulmonary, Allergy, Critical Care, and Sleep Medicine, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA(2).

Journal of Colloid and Interface Science
|March 14, 2024
PubMed
Summary

Unsteady liquid spreading on soft solids exhibits stick-slip behavior. This phenomenon is driven by liquid inertia, capillary forces, and a growing pinning force from the solid

Keywords:
Soft surfacesStick-slipWetting

More Related Videos

Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids
10:09

Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids

Published on: March 5, 2014

12.4K
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

8.7K

Related Experiment Videos

Last Updated: Jun 30, 2025

Challenges in Rheological Characterization of Highly Concentrated Suspensions &#8212; A Case Study for Screen-printing Silver Pastes
08:42

Challenges in Rheological Characterization of Highly Concentrated Suspensions — A Case Study for Screen-printing Silver Pastes

Published on: April 10, 2017

20.0K
Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids
10:09

Fast Imaging Technique to Study Drop Impact Dynamics of Non-Newtonian Fluids

Published on: March 5, 2014

12.4K
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

8.7K

Area of Science:

  • Soft matter physics
  • Fluid dynamics
  • Surface science

Background:

  • Liquid spreading on soft solids often exhibits intermittent stick-slip dynamics.
  • Previous studies primarily focused on quasi-static or forced spreading, where a persistent ridge forms, minimizing velocity dependence.
  • Unsteady wetting, a common scenario, remains less explored, with a hypothesized dependence on sticking duration, velocity, and ridge growth.

Purpose of the Study:

  • To investigate the mechanisms controlling stick-slip transitions in unsteady wetting of soft solids.
  • To explore the role of the growing wetting ridge in influencing the depinning threshold.
  • To develop a predictive model for stick-to-slip transitions based on liquid and solid properties.

Main Methods:

  • Conducted unsteady wetting experiments using freely spreading water droplets on soft solids of varying stiffness.
  • Employed synchronous high-speed imaging and interferometry to capture stick-slip behavior and wetting ridge evolution.
  • Analyzed experimental data to correlate stick-slip characteristics with wetting ridge dynamics.

Main Results:

  • Identified a competition between liquid inertia, capillary force changes, and solid viscoelasticity-induced pinning force as drivers of intermittent wetting.
  • Developed a theoretical framework to quantitatively predict stick-to-slip transitions.
  • Established relationships between contact angle change, sticking duration, spreading velocity, and solid viscoelastic properties.

Conclusions:

  • Unsteady wetting on soft solids is governed by a dynamic interplay of inertial, capillary, and viscoelastic forces.
  • The growing wetting ridge significantly impacts the depinning threshold, controlling stick-slip transitions.
  • The findings offer mechanistic insights and control strategies for unsteady wetting in applications like tissue engineering and flexible electronics.