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Related Concept Videos

Integration of Synaptic Events01:28

Integration of Synaptic Events

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Synaptic integration mainly includes the summation of graded potentials. Graded potentials, regardless of their type, cause subtle alterations in membrane voltage, resulting in either depolarization or hyperpolarization. These incremental changes, when combined or summed, can propel the neuron toward its threshold. Consider, for example, a membrane experiencing a +15 mV shift, causing it to depolarize from -70 mV to -55 mV. In this scenario, graded potentials govern the membrane's ability to...
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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
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Updated: Jul 8, 2025

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes
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Bi2O2Se-based CBRAM integrated artificial synapse.

Dharmendra Verma1, Tsung-Cheng Chen1, Bo Liu2

  • 1Department of Electronic Engineering, Chang Gung University, Taoyuan 33302, Taiwan.

Heliyon
|December 18, 2023
PubMed
Summary
This summary is machine-generated.

Few-layered bismuth oxyselenide (Bi2O2Se) demonstrates promising conductive bridge random access memory (CBRAM) and artificial synapse capabilities. This 2D material exhibits stable switching and multilevel characteristics for advanced memory applications.

Keywords:
2D materialArtificial synapseBi2O2SeCBRAMCross point structure

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics

Background:

  • Two-dimensional (2D) semiconducting materials are crucial for advanced memory applications.
  • Bismuth oxyselenide (Bi2O2Se) is a 2D material with high electron mobility and significant potential.
  • Memristor structures integrating 2D materials enable novel memory devices.

Purpose of the Study:

  • To investigate the out-of-plane switching behavior of few-layered Bi2O2Se.
  • To explore its application in conductive bridge random access memory (CBRAM).
  • To evaluate its potential as an artificial synapse for neuromorphic computing.

Main Methods:

  • Fabrication of a CBRAM device using CVD-grown Bi2O2Se as the switching material (SM) in an Al/Cu/Bi2O2Se/Pd structure.
  • Characterization of device performance, including DC cycling, voltage retention, and multilevel switching.
  • Analysis of the switching mechanism using High-Resolution Transmission Electron Microscopy (HRTEM).

Main Results:

  • The CBRAM device demonstrated approximately 90 stable DC switching cycles with consistent SET/RESET voltages.
  • Excellent data retention exceeding 10 ks was observed.
  • Multilevel switching characteristics were achieved, showing four distinct states.
  • Successful realization of an artificial synapse with tunable potentiation and depression.

Conclusions:

  • Few-layered Bi2O2Se exhibits intrinsic switching behavior suitable for CBRAM applications.
  • The material shows potential for use in artificial synapses for neuromorphic computing.
  • Cu migration through Bi2O2Se is identified as the switching mechanism.
  • The developed structure holds promise for future integrated memory technologies.