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Related Concept Videos

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

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 semiconductor's...
Biasing of Metal-Semiconductor Junctions01:27

Biasing of Metal-Semiconductor Junctions

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...
Gap Junctions01:37

Gap Junctions

Multicellular organisms employ a variety of ways for cells to communicate with each other. Gap junctions are specialized proteins that form pores between neighboring cells in animals, connecting the cytoplasm between the two, and allowing for the exchange of molecules and ions. They are found in a wide range of invertebrate and vertebrate species, mediate numerous functions including cell differentiation and development, and are associated with numerous human diseases, including cardiac and...
P-N junction01:11

P-N junction

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...
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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...
Mechanically-gated Ion Channels01:12

Mechanically-gated Ion Channels

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...

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Mechanically controllable break junctions for molecular electronics.

Dong Xiang1, Hyunhak Jeong, Takhee Lee

  • 1Department of Physics and Astronomy, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 151-747, Korea.

Advanced Materials (Deerfield Beach, Fla.)
|August 6, 2013
PubMed
Summary
This summary is machine-generated.

Mechanically controllable break junctions (MCBJ) are key for studying single-molecule electronics. This review covers MCBJ fabrication, operation, applications, and future directions in molecular electronics research.

Keywords:
electron transportmolecular electronicsnanogapsingle molecular junction

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Mechanically controllable break junctions (MCBJ) are crucial for investigating molecular electronic junctions.
  • Understanding charge transport in single molecules is vital for advancing molecular electronics.

Purpose of the Study:

  • To provide a comprehensive review of mechanically controllable break junction (MCBJ) techniques.
  • To discuss the fabrication, operation, applications, challenges, and future prospects of MCBJs in molecular electronics.

Main Methods:

  • Review of existing literature on MCBJ fabrication and operation.
  • Analysis of various applications of MCBJs in studying molecular electronic properties.
  • Discussion of historical development, current challenges, and future trends in MCBJ technology.

Main Results:

  • MCBJ technique offers unique advantages for single-molecule electronics research.
  • MCBJ has significantly advanced the understanding of charge transport processes in molecules.
  • The review consolidates knowledge on MCBJ fabrication, operation, and applications.

Conclusions:

  • MCBJs are fundamental tools for exploring the electronic properties of single molecules.
  • Continued development of MCBJ technology is essential for future breakthroughs in molecular electronics.
  • This review serves as a valuable resource for researchers in the field of molecular electronics.