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Related Concept Videos

Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Related Experiment Video

Updated: May 8, 2026

Design, Surface Treatment, Cellular Plating, and Culturing of Modular Neuronal Networks Composed of Functionally Inter-connected Circuits
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Three-Dimensional Integrated Synaptic Devices Based on a Silver-Cluster Conduction Mechanism with High

Mingjun Li1, Ming Li1, Jun Seop An1

  • 1Department of Electronics and Computer Engineering, Hanyang University, Seoul 04763, Republic of Korea.

ACS Applied Materials & Interfaces
|August 1, 2024
PubMed
Summary

This study introduces a novel artificial synapse using polyimide-molybdenum disulfide quantum dots (MoS2 QDs) for enhanced stability. The new device demonstrates reliable synaptic functions and high recognition rates, even at elevated temperatures.

Keywords:
Ag cluster-type filamentshigh thermal stabilitymolybdenum disulfide quantum dotsneuromorphic computingsynaptic devicesthree-dimensional stacked

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Neuroscience

Background:

  • Traditional conductive filament (CF) synaptic devices suffer from unreliable CF formation/dissolution, impacting stability.
  • Joule heating and thermal coupling in conventional devices further degrade CFs over time.
  • These limitations hinder the practical application of artificial synaptic devices.

Purpose of the Study:

  • To develop a stable and reliable artificial synapse device.
  • To overcome the limitations of traditional CF-based synaptic devices.
  • To investigate the performance of a novel polyimide-molybdenum disulfide quantum dot (MoS2 QD) nanocomposite.

Main Methods:

  • Fabrication of an artificial synapse using polyimide-MoS2 QD nanocomposites.
  • Utilizing MoS2 QDs to induce Ag ion reduction and control CF growth.
  • Testing synaptic functions, including long-term potentiation/long-term depression (LTP/LTD).
  • Evaluating device performance in high-temperature environments (up to 110 °C).

Main Results:

  • The MoS2 QD-based device achieved stable synaptic functions.
  • Demonstrated good linearity in long-term potentiation/long-term depression (LTP/LTD).
  • The device maintained normal operation at 110 °C due to altered CF shapes.
  • Achieved high recognition rates of ~90.75% at room temperature and ~90.63% at 110 °C.

Conclusions:

  • The developed MoS2 QD-based artificial synapse offers enhanced stability and reliability.
  • The device exhibits robust performance across a range of temperatures, suitable for demanding applications.
  • This work presents a promising pathway for high-performance, temperature-resilient neuromorphic computing.