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Scaled-down ionic liquid-functionalized geopolymer memristors.

Maedeh Ahmadipour1, Mahmudul Alam Shakib2, Zhaolin Gao2

  • 1Department of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, USA. reza@iastate.edu.

Materials Horizons
|May 13, 2025
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Summary
This summary is machine-generated.

Researchers developed low-cost, sustainable geopolymer memristors at the micron-scale. Functionalizing with ionic liquids improved memory retention by 50%, enabling advanced neuromorphic computing applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Neuroscience

Background:

  • Traditional memristors use expensive fabrication methods.
  • Geopolymer memristors offer a low-cost, sustainable alternative.
  • Previous geopolymer memristors were too large and had poor memory retention.

Purpose of the Study:

  • To develop smaller, more stable geopolymer memristors.
  • To enhance the synaptic properties of geopolymer memristors.
  • To enable geopolymer memristors for neuromorphic computing.

Main Methods:

  • Fabrication of micron-scale geopolymer memristors using inexpensive methods.
  • Functionalization of geopolymer pores with EMIM+ Ot f- ionic liquid.
  • Characterization of memristive switching, synaptic properties, and retention.

Main Results:

  • Achieved 99.998% volume reduction for micron-scale devices.
  • Ionic liquid functionalization improved memory retention by 50%.
  • Demonstrated ideal synaptic properties including PPF, PPD, and STDP.

Conclusions:

  • Ionic liquid-functionalized, micron-scale geopolymer memristors overcome previous limitations.
  • These improved memristors are suitable for space-efficient neuromorphic computing.
  • Potential applications include reservoir computing and in-memory computing.