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

Electron Affinity03:07

Electron Affinity

32.6K
The electron affinity (EA) is the energy change for adding an electron to a gaseous atom to form an anion (negative ion).
32.6K
Electrochemical Systems01:24

Electrochemical Systems

182
Electrochemical systems provide a fascinating insight into the dynamic interplay of charged species within various phases. One notable example is the interaction between a membrane permeable to K⁺ ions but not to Cl⁻ ions, separating an aqueous KCl solution from pure water. As K⁺ ions diffuse through the membrane, they generate net charges on each phase, leading to a potential difference between them.Similarly, when a piece of Zn is immersed in an aqueous ZnSO₄ solution,...
182
P-N junction01:11

P-N junction

1.7K
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
1.7K
Finding Electric Potential From Electric Field01:13

Finding Electric Potential From Electric Field

5.1K
For a system of charges, it is easy to calculate the system's potential because potential is a scalar quantity. However, in some instances where calculating the electric field is more straightforward than finding the potential, the electric field is used to calculate the system's potential. For a positive charge, the electric field is radially outward, and the potential is positive at any finite distance from the positive charge. In such an electric field, the motion away from the...
5.1K
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

949
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
949
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

921
Biasing metal-semiconductor junctions involves applying a voltage across the junction. Specifically, the metal is connected to a voltage source, while the semiconductor is grounded. This technique is essential for controlling the direction and magnitude of current flow in electronic devices, including diodes, transistors, and photovoltaic cells.
In Schottky junctions, where the semiconductor is n-type, applying a positive voltage to the metal relative to the semiconductor reduces its Fermi...
921

You might also read

Related Articles

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

Sort by
Same author

Two Mechanisms Limiting the Emitted Electron Current from a Cathode to an Anode.

Physical review letters·2025
Same author

Thermionic Cooling of the Target Plasma to a Sub-eV Temperature.

Physical review letters·2019
Same author

Alternative model of space-charge-limited thermionic current flow through a plasma.

Physical review. E·2018
Same author

Strongly Emitting Surfaces Unable to Float below Plasma Potential.

Physical review letters·2016
Same author

General cause of sheath instability identified for low collisionality plasmas in devices with secondary electron emission.

Physical review letters·2012
Same author

Absence of Debye sheaths due to secondary electron emission.

Physical review letters·2012
Same journal

Tension on dsDNA bound to ssDNA-RecA filaments may play an important role in driving efficient and accurate homology recognition and strand exchange.

Physical review. E, Statistical, nonlinear, and soft matter physics·2016
Same journal

Publisher's Note: Amplitude-phase coupling drives chimera states in globally coupled laser networks [Phys. Rev. E 91, 040901(R) (2015)].

Physical review. E, Statistical, nonlinear, and soft matter physics·2016
Same journal

Erratum: Shapes of sedimenting soft elastic capsules in a viscous fluid [Phys. Rev. E 92, 033003 (2015)].

Physical review. E, Statistical, nonlinear, and soft matter physics·2016
Same journal

Erratum: Attenuation of excitation decay rate due to collective effect [Phys. Rev. E 90, 022142 (2014)].

Physical review. E, Statistical, nonlinear, and soft matter physics·2016
Same journal

Publisher's Note: Role of connectivity and fluctuations in the nucleation of calcium waves in cardiac cells [Phys. Rev. E 92, 052715 (2015)].

Physical review. E, Statistical, nonlinear, and soft matter physics·2016
Same journal

Publisher's Note: Lattice Boltzmann approach for complex nonequilibrium flows [Phys. Rev. E 92, 043308 (2015)].

Physical review. E, Statistical, nonlinear, and soft matter physics·2016
See all related articles

Related Experiment Video

Updated: May 7, 2026

Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas
08:10

Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas

Published on: May 25, 2021

5.3K

Negative plasma potential relative to electron-emitting surfaces.

M D Campanell1

  • 1Princeton Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543, USA.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 16, 2013
PubMed
Summary
This summary is machine-generated.

A novel "inverse sheath" structure is discovered in plasma-wall interactions with strong electron emission. This new model predicts a negative plasma potential, preventing ion sputtering and charge loss at the wall.

More Related Videos

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
06:58

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization

Published on: July 12, 2016

9.1K
Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
07:54

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas

Published on: April 3, 2018

8.0K

Related Experiment Videos

Last Updated: May 7, 2026

Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas
08:10

Building Langmuir Probes and Emissive Probes for Plasma Potential Measurements in Low Pressure, Low Temperature Plasmas

Published on: May 25, 2021

5.3K
Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization
06:58

Electrochemical Etching and Characterization of Sharp Field Emission Points for Electron Impact Ionization

Published on: July 12, 2016

9.1K
Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas
07:54

Experimental Methods of Dust Charging and Mobilization on Surfaces with Exposure to Ultraviolet Radiation or Plasmas

Published on: April 3, 2018

8.0K

Area of Science:

  • Plasma physics
  • Surface science
  • Materials science

Background:

  • Plasma-wall interactions are crucial in many applications.
  • Previous models predicted space-charge-limited (SCL) sheaths with strong electron emission.
  • SCL sheaths result in a positive plasma potential relative to the wall.

Purpose of the Study:

  • To investigate an alternative plasma sheath structure under strong electron emission.
  • To analytically and numerically demonstrate the existence of an
  • inverse sheath
  • regime.
  • To explore the implications of this new sheath structure on plasma properties and wall interactions.

Main Methods:

  • Analytical solution for the inverse sheath regime with Maxwellian electrons of different temperatures.
  • Full plasma simulation of a plasma bounded by strongly emitting walls.
  • Comparison with existing particle-in-cell simulation studies.

Main Results:

  • Demonstrated an analytical solution for the inverse sheath.
  • Simulations confirmed the formation of inverse sheaths at strongly emitting walls.
  • Observed a monotonically increasing potential towards the wall, shielded by a negative charge layer.
  • Found zero ion wall flux and confined ions within the plasma.

Conclusions:

  • The inverse sheath is a fundamentally different and possible structure in plasma-wall interactions with strong electron emission.
  • This structure leads to a negative plasma potential, vanishing ion sputtering, and no net charge loss at the wall.
  • Results challenge previous SCL sheath predictions and simulation artifacts.