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

P-N junction01:11

P-N junction

620
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...
620
Biasing of P-N Junction01:16

Biasing of P-N Junction

749
The operation of a p-n junction diode involves various biasing conditions, including forward bias, reverse bias, and equilibrium.
In equilibrium, no external voltage is applied across the p-n junction. The depletion region is formed at the junction interface due to the diffusion of carriers, which leaves behind charged dopants, acceptors on the p-side, and donors on the n-side. These immobile charges create an electric field that prevents further diffusion of carriers. The related energy band...
749
Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

437
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...
437
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

315
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...
315
Bipolar Junction Transistor01:22

Bipolar Junction Transistor

885
Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational...
885
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

6.6K
Mechanically-gated ion channels are proteins found in eukaryotic and prokaryotic cell membranes that open in response to mechanical stress. Tension, compression, swelling, and shear stress can alter the conformation of the protein, opening a transmembrane channel that allows the passage of ions for signal transmission. In eukaryotes, mechanically-gated channels are distributed in several regions like the neurons, lungs, skin, bladder, and heart, where they play critical roles in numerous...
6.6K

You might also read

Related Articles

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

Sort by
Same author

Initial cardioplegia dose indexed to left ventricular mass in mitral valve surgery.

Perfusion·2026
Same author

TACE Combined with Ralox-HAIC (Oxaliplatin Puls Raltitrexed) and System Therapy in Patients with Unresectable Hepatocellular Carcinoma.

Journal of hepatocellular carcinoma·2026
Same author

A "Three-in-One" AuNRs@ZIF-8/AuNPs Nanoplatform: Nanoenzyme-Mediated SERS-Colorimetric Bimodal Detection of Intracellular Glutathione and Photothermal Therapy.

ACS applied materials & interfaces·2026
Same author

Central nervous system multiple myeloma: An update for 2026.

Annals of hematology·2026
Same author

Entropy-Stabilized High-Entropy Sulfide Anodes for Fast-Charging and Long-Life Sodium-Ion Batteries.

ACS applied materials & interfaces·2026
Same author

Dissipative quantum geometric phase in the spin-boson system.

The Journal of chemical physics·2026

Related Experiment Video

Updated: Aug 24, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

9.8K

Dipole-Modulated Charge Transport through PNP-Type Single-Molecule Junctions.

Mingyao Li1, Huanyan Fu1,2, Boyu Wang2

  • 1Beijing National Laboratory for Molecular Sciences, National Biomedical Imaging Center, College of Chemistry and Molecular Engineering, Peking University, 292 Chengfu Road, Haidian District, Beijing100871, P. R. China.

Journal of the American Chemical Society
|October 24, 2022
PubMed
Summary

Researchers created a novel PNP-type single-molecule junction using azulene molecules. This breakthrough allows precise control over charge transport and potential barriers in molecular electronics.

More Related Videos

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

14.8K
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

9.7K

Related Experiment Videos

Last Updated: Aug 24, 2025

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
11:33

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

9.8K
Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
14:58

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping

Published on: June 3, 2015

14.8K
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

9.7K

Area of Science:

  • Molecular electronics
  • Condensed matter physics
  • Materials science

Background:

  • PNP structures are crucial for electronic and optoelectronic devices.
  • Understanding single-molecule behavior is key to advancing molecular electronics.

Purpose of the Study:

  • To construct and characterize a PNP-type single-molecule junction.
  • To investigate the role of intrinsic molecular dipoles in charge transport.
  • To explore energy band engineering at the single-molecule level.

Main Methods:

  • Designing a back-to-back azulene molecule with opposing dipole moments.
  • Fabricating single-molecule junctions.
  • Conducting theoretical and experimental studies of charge transport.

Main Results:

  • Successful construction of a PNP-type single-molecule junction.
  • Demonstration that intrinsic molecular dipoles can tune charge transport.
  • Observation of adjustable potential barriers in the molecular junction.

Conclusions:

  • Intrinsic dipoles offer effective control over single-molecule charge transport.
  • Energy band engineering and charge transport regulation are achievable at the single-molecule level.
  • Provides insights for developing high-performance molecular nanocircuits.