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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
Summary
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.
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.
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