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

Fermi Level Dynamics01:12

Fermi Level Dynamics

1.1K
The vacuum level denotes the energy threshold required for an electron to escape from a material surface. It is usually positioned above the conduction band of a semiconductor and acts as a benchmark for comparing electron energies within various materials.
Electron affinity in semiconductors refers to the energy gap between the minimum of its conduction band and the vacuum level and it is a critical parameter in determining how easily a semiconductor can accept additional electrons.
The work...
1.1K
The Electrical Double Layer01:30

The Electrical Double Layer

217
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
217
Electrochemical Systems01:24

Electrochemical Systems

166
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,...
166
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

1.4K
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
1.4K
Fermi Level01:18

Fermi Level

2.5K
The Fermi-Dirac function is represented by an S-shaped curve indicating the probability of an energy state being occupied by an electron at a given temperature. The Fermi level is the energy level at which there is a fifty percent chance of finding an electron, and it is positioned between the lower-energy valence band and the higher-energy conduction band.
At absolute zero temperature, electrons fill all energy states up to the Fermi level, leaving upper states empty. As the temperature rises,...
2.5K
Energy Bands in Solids01:01

Energy Bands in Solids

2.3K
Isolated atoms have discrete energy levels that are well described by the Bohr model. And, it quantifies the energy of an electron in a hydrogen atom as En. Higher quantum numbers 'n' yield less negative, closer electron energy levels.
 Band Formation:
When atoms are brought close together, as in a solid, these discrete energy levels begin to split due to the overlap of electron orbitals from adjacent atoms. This split occurs because of the Pauli exclusion principle, which states...
2.3K

You might also read

Related Articles

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

Sort by
Same author

Genetically Informed Single-Cell Analysis Reveals <i>PLXND1</i> as a Cell-Type-Specific Molecular Switch in MASLD.

Metabolites·2026
Same author

Liver endothelial zonation orchestrates hepatic steatosis onset through retinoic acid-regulated FGF1.

Science advances·2026
Same author

LEPR Contributes to Lung Squamous Cell Carcinoma: Insights From Mendelian Randomization and Experimental Studies.

Cancer informatics·2026
Same author

Association between renal replacement therapy and in-hospital mortality in patients with severe acute kidney injury: a retrospective cohort study based on MIMIC-IV database.

BMC urology·2026
Same author

Integrating single-cell RNA-seq and machine learning to dissect polyamine metabolism in metabolic dysfunction-associated steatotic liver disease.

Frontiers in medicine·2026
Same author

Co-Delivery of Glucose Oxidase and Iron-Doped ZIF-8 as a pH-Responsive Ferroptosis and Starvation Agent for Triple-Negative Breast Cancer Therapy.

Nanomaterials (Basel, Switzerland)·2026

Related Experiment Video

Updated: Apr 21, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K

Charge separation at nanoscale interfaces: energy-level alignment including two-quasiparticle interactions.

Huashan Li1, Zhibin Lin1, Mark T Lusk1

  • 1Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.

The Journal of Chemical Physics
|October 24, 2014
PubMed
Summary

Understanding charge separation at nanoscale interfaces is key for optoelectronics. This study reveals that two-quasiparticle effects, often overlooked, are crucial for accurate predictions in nanoscale materials.

More Related Videos

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

7.1K
Atomically Traceable Nanostructure Fabrication
12:35

Atomically Traceable Nanostructure Fabrication

Published on: July 17, 2015

8.3K

Related Experiment Videos

Last Updated: Apr 21, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.2K
Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations
13:56

Probe Type II Band Alignment in One-Dimensional Van Der Waals Heterostructures Using First-Principles Calculations

Published on: October 12, 2019

7.1K
Atomically Traceable Nanostructure Fabrication
12:35

Atomically Traceable Nanostructure Fabrication

Published on: July 17, 2015

8.3K

Area of Science:

  • Materials Science
  • Quantum Mechanics
  • Optoelectronics

Background:

  • Charge separation at interfaces is fundamental for nanoscale optoelectronic devices.
  • Existing models often simplify or neglect crucial two-quasiparticle interactions.

Purpose of the Study:

  • To investigate universal criteria for charge separation at nanoscale interfaces.
  • To propose a method incorporating two-quasiparticle effects for accurate analysis.
  • To highlight the importance of these effects in quantum-confined systems.

Main Methods:

  • Utilizing many-body perturbation theory based on Green's functions.
  • Developing a scheme to add two-quasiparticle interactions to single-quasiparticle energy level alignment.
  • Quantitative demonstration of charge separation dynamics.

Main Results:

  • Identified exciton binding, Coulomb stabilization, and exciton transfer as critical two-quasiparticle effects.
  • Demonstrated that simplified methods lead to qualitatively incorrect predictions.
  • Accurate modeling requires inclusion of these complex interactions.

Conclusions:

  • Two-quasiparticle effects are indispensable for understanding charge separation at nanoscale interfaces.
  • The proposed scheme provides a more accurate framework for optoelectronic applications.
  • Quantum confinement effects necessitate the consideration of these many-body interactions.