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Related Concept Videos

Redox Reactions01:24

Redox Reactions

Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
Types of Reversible Electrodes01:24

Types of Reversible Electrodes

For electrode reversibility to be maintained, all the reactants and products involved in the half-reaction must be present at the electrode. There are several types of reversible electrodes (half-cells).In metal-metal-ion electrodes, a metal balances electrochemically with a solution of its own ions. Examples are Cu2+|Cu and Zn2+|Zn. Metals that react with the solvent, like group 1 and most group 2 metals, which react with water, and zinc, which reacts with aqueous acidic solutions, cannot be...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Redox Equilibria: Overview01:23

Redox Equilibria: Overview

A reduction-oxidation reaction is commonly called a redox reaction. In a redox reaction, electrons are transferred from one species to another rather than being shared between or among atoms. The reducing agent or reductant is the species that loses electrons and gets oxidized in the process. The species that gains electrons and gets reduced in the process is the oxidizing agent or oxidant. Redox reactions are represented as two separate equations called half-reactions, where one equation...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...

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Related Experiment Video

Updated: May 14, 2026

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

Redox-based resistive switching memories.

Rainer Waser1

  • 1IWE 2, RWTH Aachen, and PGI-7, Forschungszentrum Jülich, JARA-FIT 52425 Jülich, Germany.

Journal of Nanoscience and Nanotechnology
|February 21, 2013
PubMed
Summary
This summary is machine-generated.

This review explores resistive random access memories (ReRAM), detailing their nanoscale redox and ionic switching mechanisms. These advanced memory devices offer fast switching, low energy use, and potential for miniaturization to 5 nm and below.

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Area of Science:

  • Materials Science
  • Solid-State Physics
  • Nanotechnology

Background:

  • Resistive random access memories (ReRAM) store data using nanoscale redox and ionic motion.
  • Understanding the physics and chemistry of these processes is crucial for ReRAM operation.
  • The valence change memory (VCM) effect is a key mechanism in ReRAM technology.

Purpose of the Study:

  • To review the fundamental principles of ReRAM technology.
  • To explain the microscopic switching mechanisms and nonlinear kinetics in ReRAM.
  • To highlight the key characteristics and future potential of ReRAM devices.

Main Methods:

  • Review of existing literature on ReRAM.
  • Analysis of nanoscale redox and ionic processes.
  • Explanation of valence change memory (VCM) effects.

Main Results:

  • ReRAM devices exhibit very short switching times.
  • Low switching energies and long data retention times are characteristic of ReRAM.
  • ReRAM technology shows scalability potential down to 5 nm and below.

Conclusions:

  • ReRAM offers a promising non-volatile memory technology.
  • The nanoscale ionic and redox mechanisms are key to ReRAM performance.
  • Further development of ReRAM could lead to significant advancements in memory density and efficiency.