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

Colloids and Suspensions01:17

Colloids and Suspensions

2.3K
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 visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...
2.3K
Colloids03:22

Colloids

17.9K
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...
17.9K
Capillarity in Fluid01:19

Capillarity in Fluid

380
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...
380
Colloidal precipitates01:09

Colloidal precipitates

747
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...
747
Surface Tension of Fluid01:22

Surface Tension of Fluid

481
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...
481
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

29.2K
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...
29.2K

You might also read

Related Articles

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

Sort by
Same author

Effects of surface roughness on droplet impact dynamics.

Soft matter·2026
Same author

Fabrication of Janus Supraparticles by Induced Phase Separation by Gravity.

ACS nano·2026
Same author

Dynamic Contact Angles on Moving Fibers Measured by X-ray Holography.

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

Nacre-Inspired Composite Coatings with Hierarchical Architecture for Durable Surface Protection.

Chemistry of materials : a publication of the American Chemical Society·2026
Same author

Tethered Cation Size Affects the Imbibition of Polymerized Ionic Liquids and the Ionic Conductivity in Nanopores.

Macromolecules·2026
Same author

Poly(ethylene glycol) Crystallization in Multifunctional Polypeptide-Polymer Hybrids Based on Human Serum Albumin Scaffolds.

Biomacromolecules·2026
Same journal

Tuning Piezoelectricity and Pyroelectricity in Poly(vinylidene fluoride) through Ionic Liquid Anion-Size Directed Polymorph and Interface Engineering.

ACS applied materials & interfaces·2026
Same journal

Adsorption-Induced Ferroelectric Symmetry Breaking in Two-Dimensional CuInP<sub>2</sub>S<sub>6</sub>.

ACS applied materials & interfaces·2026
Same journal

Nanocomplexes Integrated into a Polymeric Bilayer Film Enhance Buccal Permeation of a GLP-1 Peptide Analogue.

ACS applied materials & interfaces·2026
Same journal

Correction to "Multienzyme Active Nanozyme for Efficient Sepsis Therapy through Modulating Immune and Inflammation Inhibition".

ACS applied materials & interfaces·2026
Same journal

A Programmable Perfusion Platform with Temperature Monitoring Achieves Multiscale Cryopreservation.

ACS applied materials & interfaces·2026
Same journal

Oral Delivery of Mesenchymal Stem Cell-Derived Extracellular Vesicles To Treat Intestinal Inflammation.

ACS applied materials & interfaces·2026
See all related articles

Related Experiment Video

Updated: Sep 9, 2025

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

6.8K

Capillary-Wave-Driven Jumping Droplets on Superhydrophobic Colloidal Rafts.

Till Pfeiffer1, Jakob Sterz1, Luca Pekari1

  • 1Institute for Technical Thermodynamics, Technical University of Darmstadt, Darmstadt 64287, Germany.

ACS Applied Materials & Interfaces
|September 2, 2025
PubMed
Summary
This summary is machine-generated.

Researchers discovered a new droplet jumping phenomenon where multiple microdroplets launch simultaneously from superhydrophobic rafts. This occurs when a capillary wave, generated by droplet coalescence, propels neighboring droplets off the rafts.

Keywords:
capillary wavescolloidal raftsdroplet coalescencedropwise condensationjumping dropletsmother and daughter dropssuperhydrophobic surfaces

More Related Videos

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

5.5K
Taking Advantage of Reduced Droplet-surface Interaction to Optimize Transport of Bioanalytes in Digital Microfluidics
07:57

Taking Advantage of Reduced Droplet-surface Interaction to Optimize Transport of Bioanalytes in Digital Microfluidics

Published on: November 10, 2014

8.0K

Related Experiment Videos

Last Updated: Sep 9, 2025

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

6.8K
Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
08:27

Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation

Published on: August 28, 2017

5.5K
Taking Advantage of Reduced Droplet-surface Interaction to Optimize Transport of Bioanalytes in Digital Microfluidics
07:57

Taking Advantage of Reduced Droplet-surface Interaction to Optimize Transport of Bioanalytes in Digital Microfluidics

Published on: November 10, 2014

8.0K

Area of Science:

  • Fluid Dynamics
  • Surface Science
  • Microscale Phenomena

Background:

  • Droplet jumping is a known phenomenon with several established mechanisms, including coalescence-induced, evaporation-induced, and partially constrained droplet jumping.
  • Understanding droplet dynamics on surfaces is crucial for applications in microfluidics, heat transfer, and anti-fouling technologies.

Purpose of the Study:

  • To introduce and characterize a novel droplet jumping phenomenon involving multiple microdroplets.
  • To elucidate the underlying physical mechanism driving the simultaneous jumping of microdroplets from superhydrophobic rafts.
  • To develop a model for predicting the droplet launching region.

Main Methods:

  • Experimental observation of microdroplet behavior on superhydrophobic colloidal rafts.
  • Triggering droplet jumping via coalescence with an underlying water source.
  • Analysis of capillary wave propagation and its effect on droplet launching.
  • Derivation of a simple theoretical model to estimate the droplet launching area.

Main Results:

  • A new phenomenon of simultaneous multiple microdroplet jumping from superhydrophobic colloidal rafts was identified.
  • The jumping is triggered by the coalescence of a microdroplet with underlying water, generating a capillary wave.
  • This capillary wave propagates, perturbs the rafts, and launches the adjacent microdroplets.
  • A model was developed to estimate the size of the droplet launching region.

Conclusions:

  • The study reveals a novel mechanism for droplet launching driven by energy transfer through capillary waves.
  • Coalescing droplets can impart useful work to flexible or floating substrates, propelling neighboring droplets.
  • This finding has implications for controlling microdroplet behavior and developing novel propulsion methods.