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Near-Infrared Responsive Ionoelastomer Junction Enabling Switchable Ionic Logic Gate.

Yeonji Kim1, Seung Won Lee1,2, Jihye Jang1

  • 1Department of Materials Science and Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea.

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|December 12, 2025
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Summary
This summary is machine-generated.

Researchers developed a novel near-infrared (NIR)-responsive ionic junction using ionoelastomers and MXene nanosheets. This junction acts as a switchable logic gate, demonstrating reversible control over ionic current rectification with NIR light.

Keywords:
NIR-responsive current rectificationionic junction diodeionoelastomerphotothermal energy conversionpositively and negatively charged MXene nanosheetsswitchable logic gate

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Ionic Electronics

Background:

  • Ionic junctions for current rectification are advancing, mimicking electronic p-n junctions.
  • Stimuli-responsive ionic junctions with reversible control are rarely demonstrated.

Purpose of the Study:

  • To present a near-infrared (NIR)-responsive ionic junction.
  • To demonstrate its application as a switchable logic gate.

Main Methods:

  • Fabrication of a bilayer ionoelastomer junction with NIR-responsive 2D MXene (Ti3C2Tx) nanosheets.
  • Incorporation of MXene with specific surface potentials into p-type (cationic) and n-type (anionic) ionoelastomers.
  • Utilizing photothermal energy conversion of MXene upon NIR exposure to modulate ionic diffusion and rectification.

Main Results:

  • Enhanced ionic current rectification in the developed ionic diode.
  • NIR exposure significantly increased rectification ratio due to MXene's photothermal effect.
  • Reversible control of rectification ratio with NIR exposure time and power.

Conclusions:

  • Demonstrated a switchable ionic logic gate based on the NIR-responsive ionic junction.
  • Achieved reversible manipulation of logic gate states (AND-to-OR transition) using NIR light and cooling.
  • Highlighted the potential of MXene-based ionoelastomers for advanced ionic devices.