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 Active Agents01:27

Surface Active Agents

Surfactants, named for their behavior at interfaces, positively adsorb at the interfaces of two phases, reducing interfacial tension. Their versatility as emulsifiers, detergents, and foaming agents stems from this ability. Surfactants, often termed amphiphiles, share the property of amphipathy, with molecules having both hydrophilic and hydrophobic portions. The hydrophilic part is called the head, and the hydrophobic part, including an elongated alkyl substituent, forms the tail.Surfactants...
Surface Tension, Capillary Action, and Viscosity02:57

Surface Tension, Capillary Action, and Viscosity

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...
Surface Tension of Fluid01:22

Surface Tension of Fluid

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 with...
Hydrostatic Pressure Force on a Curved Surface01:04

Hydrostatic Pressure Force on a Curved Surface

Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...
Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
Surface Tension01:24

Surface Tension

Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...

You might also read

Related Articles

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

Sort by
Same author

A parametric study of mechanoporation through microfluidic design to modulate shear, compressive, and adhesion forces and loading rates.

Lab on a chip·2026
Same author

Mesoscale Modeling of Hydrogels Under Frictional Shear Stress.

Macromolecules·2026
Same author

Mechanotyping of Organoids for Assessing Drug-Induced Injuries.

Advanced materials (Deerfield Beach, Fla.)·2025
Same author

Overcoming the Energy vs Power Dilemma in Commercial Li-Ion Batteries via Sparse Channel Engineering.

ACS energy letters·2024
Same author

Adhesion-based high-throughput label-free cell sorting using ridged microfluidic channels.

Soft matter·2024
Same author

Using Footpad Sculpturing to Enhance the Maneuverability and Speed of a Robotic Marangoni Surfer.

Biomimetics (Basel, Switzerland)·2023

Related Experiment Video

Updated: Jun 8, 2026

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
11:20

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

Published on: August 15, 2018

Selective control of surface properties using hydrodynamic interactions.

Hassan Masoud1, Alexander Alexeev

  • 1George W. Woodruff School of Mechanical Engineering, Atlanta, Georgia, USA.

Chemical Communications (Cambridge, England)
|October 7, 2010
PubMed
Summary
This summary is machine-generated.

Computational modeling designs nano-structured surfaces to control nanoparticle and polymer interactions within microchannels. Surface nanostructure geometry dictates whether particles are attracted to or repelled from channel walls.

More Related Videos

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
08:48

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment

Published on: November 9, 2015

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
08:02

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

Published on: February 11, 2020

Related Experiment Videos

Last Updated: Jun 8, 2026

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
11:20

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

Published on: August 15, 2018

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment
08:48

Selective Area Modification of Silicon Surface Wettability by Pulsed UV Laser Irradiation in Liquid Environment

Published on: November 9, 2015

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars
08:02

Rendering SiO2/Si Surfaces Omniphobic by Carving Gas-Entrapping Microtextures Comprising Reentrant and Doubly Reentrant Cavities or Pillars

Published on: February 11, 2020

Area of Science:

  • Surface science and nanotechnology
  • Fluid dynamics and microfluidics
  • Materials science and engineering

Background:

  • Microfluidic devices are crucial for various applications, including diagnostics and drug delivery.
  • Controlling particle behavior within microchannels is essential for efficient device operation.
  • Existing methods for particle manipulation often lack precise control at the nanoscale.

Purpose of the Study:

  • To design and computationally model nano-structured surfaces for selective regulation of particle-wall interactions in microchannels.
  • To investigate the influence of nanoscopic post geometry on the behavior of colloid-polymer suspensions.
  • To achieve tunable attraction or repulsion of nanoparticles and polymers from microchannel walls.

Main Methods:

  • Utilizing computational modeling and simulations to design surface topographies.
  • Analyzing hydrodynamic interactions between fluid, nanoparticles, and polymer chains.
  • Parametric studies on nanoscopic post geometry (e.g., size, spacing, shape).

Main Results:

  • Demonstrated the ability to design nano-structured surfaces that precisely control particle behavior.
  • Identified specific nanoscopic post geometries that induce hydrodynamic attraction or repulsion.
  • Showcased the potential for selective manipulation of nanoparticles and polymer chains within microchannels.

Conclusions:

  • Nano-structured surfaces offer a powerful platform for regulating particle dynamics in microfluidic systems.
  • Surface geometry is a key design parameter for achieving desired particle-wall interactions.
  • This approach enables advanced control over colloid-polymer suspensions for tailored microfluidic applications.