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

Protein Diffusion in the Membrane01:24

Protein Diffusion in the Membrane

Proteins show rotational as well as lateral diffusion across the membrane. The lateral diffusion of proteins was confirmed through the cell fusion experiment where mouse and human cells were fused, resulting in hybrid cells. When the human and mouse cells fused, the specific membrane proteins on human and mouse cells were marked with the red and green-fluorescent markers, respectively. Initially, the red and green fluorescence was located on the respective hemisphere of the cell. As time...
Diffusion01:21

Diffusion

Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
Diffusion01:12

Diffusion

Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
Facilitated Diffusion01:16

Facilitated Diffusion

The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
Passive Diffusion: Overview and Kinetics01:17

Passive Diffusion: Overview and Kinetics

Passive diffusion is a critical process that allows small lipophilic drugs to cross the cell membrane along a concentration gradient. This mechanism's efficiency depends on four primary factors: the membrane's surface area, the drug's lipid-water partition coefficient, the concentration gradient, and the membrane's thickness.
When administered orally, drugs establish a substantial concentration gradient between the gastrointestinal (GI) lumen and the bloodstream, expediting their diffusion into...
Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion03:48

Behavior of Gas Molecules: Molecular Diffusion, Mean Free Path, and Effusion

Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target. At room temperature, a gaseous molecule will experience billions of collisions per second. The mean free path is the average distance a molecule travels between collisions. The mean free path increases with decreasing pressure; in general, the mean free path for a gaseous molecule will be...

You might also read

Related Articles

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

Sort by
Same author

A lightweight zero thermal expansion magnesium alloy.

Nature communications·2026
Same author

Molecular Dynamics Simulation and Experimental Validation of Nanoscale Droplet Wetting and Anti-Icing Performance on OTS Self-Assembled Monolayers.

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

Alternative solid hydrocarbons as propellants for electrothermal plasma radio-frequency thrusters.

Scientific reports·2025
Same author

Crop performance and profitability for the initial transition years of a regenerative cropping system in the Upper Midwest United States.

Journal of environmental quality·2025
Same author

Microstructure and composition evolution of He charged solid-gas nanocomposite films of different matrix elements during thermal annealing in vacuum.

Scientific reports·2025
Same author

Evaluating ion dynamics through Coulomb and Yukawa interaction potentials in one-component strongly coupled plasmas.

Physical review. E·2025

Related Experiment Video

Updated: Jun 25, 2026

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

Anomalous diffusion mediated by atom deposition into a porous substrate.

Pascal Brault1, Christophe Josserand, Jean-Marc Bauchire

  • 1Groupe de Recherches sur l'Energétique des Milieux Ionisés, UMR6606, Université d'Orléans, France.

Physical Review Letters
|March 5, 2009
PubMed
Summary

Constant atom deposition creates a dense overlayer that dynamically controls atomic diffusion within porous substrates. This phenomenon is modeled using a time-dependent diffusion coefficient, effectively rescaling time for porous media.

More Related Videos

Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition
10:52

Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition

Published on: May 15, 2015

Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes
10:43

Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes

Published on: July 19, 2022

Related Experiment Videos

Last Updated: Jun 25, 2026

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging
06:34

In Situ Monitoring of Diffusion of Guest Molecules in Porous Media Using Electron Paramagnetic Resonance Imaging

Published on: September 2, 2016

Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition
10:52

Formation of Thick Dense Yttrium Iron Garnet Films Using Aerosol Deposition

Published on: May 15, 2015

Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes
10:43

Single-Molecule Diffusion and Assembly on Polymer-Crowded Lipid Membranes

Published on: July 19, 2022

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Physics

Background:

  • Atomic deposition is crucial for creating functional materials.
  • Understanding diffusion in porous media is essential for various applications.
  • Controlling diffusion dynamics is a key challenge in materials fabrication.

Purpose of the Study:

  • To investigate the effects of constant flux atom deposition on porous media.
  • To analyze the role of the generated overlayer in controlling atomic diffusion.
  • To develop a generalized model for diffusion in porous substrates under these conditions.

Main Methods:

  • Constant flux atom deposition experiments.
  • Scaling analysis of the overlayer and diffusion profile.
  • Generalization of the porous diffusion equation.

Main Results:

  • A dense overlayer is formed on the porous medium.
  • The overlayer dynamically controls atomic diffusion.
  • A time-dependent diffusion coefficient model was developed, involving nonlinear time rescaling.

Conclusions:

  • The overlayer acts as a dynamic barrier, regulating atomic transport.
  • The generalized porous diffusion equation accurately models the observed phenomena.
  • This work provides a new framework for understanding and controlling diffusion in porous materials.