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Updated: Dec 26, 2025

Fabrication of Ti3C2 MXene Microelectrode Arrays for In Vivo Neural Recording

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Published on: February 12, 2020

2D MXene-TiO₂ Core-Shell Nanosheets as a Data-Storage Medium in Memory Devices.

Benzheng Lyu¹, Yongsuk Choi², Hongyue Jing¹

¹SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, 16419, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)

|March 19, 2020

Summary

This study introduces MXene-TiO2 core-shell nanosheets for nano-floating-gate transistor memory (NFGTM) devices. These materials demonstrate excellent nonvolatile memory and synaptic functions, paving the way for advanced data storage.

Keywords:

2D MXenes MXene-TiO 2 artificial synapses floating-gate memory window

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Published on: May 13, 2020

Area of Science:

Materials Science
Nanotechnology
Electronics

Background:

MXenes are 2D transition metal carbides/nitrides with potential for memory devices due to their structure, high density-of-states, and work function.
Controlling MXene surface properties is crucial for optimizing their performance in electronic applications.

Purpose of the Study:

To synthesize MXene-TiO2 core-shell nanosheets for nano-floating-gate transistor memory (NFGTM) devices.
To investigate the impact of controlled MXene oxidation on memory performance.
To demonstrate the potential of these devices for nonvolatile memory and neuromorphic computing.

Main Methods:

Deterministic synthesis of MXene-TiO2 core-shell nanosheets via controlled surface oxidation.
Fabrication of NFGTM devices using a facile, low-cost, water-based process.
Optimization of memory performance by adjusting the TiO2 tunneling layer thickness.

Main Results:

Achieved excellent nonvolatile memory characteristics: large memory window (>35.2 V), high programming/erasing current ratio (≈10^6), low off-current (<1 pA), long retention (>10^4 s), and 300 cycles endurance.
Successfully emulated synaptic functions, including excitatory/inhibitory postsynaptic currents and synaptic plasticity.
Demonstrated simultaneous formation of floating gate (MXene) and tunneling layer (TiO2) in a single process.

Conclusions:

Controlled oxidation of MXenes is a viable strategy for developing high-performance NFGTMs.
MXene-based NFGTMs show promise for future nonvolatile data storage and neuromorphic applications.
The facile synthesis method offers a cost-effective route for MXene-based electronic devices.