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Janus MXene Fiber Constructed via Flake Orientation Engineering.

Shuo Li1, Yizhou Wang2,1, Ning Chu1

  • 1Materials Science and Engineering, Physical Science and Engineering (PSE) Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Kingdom of Saudi Arabia.

Advanced Materials (Deerfield Beach, Fla.)
|September 8, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a Janus-oriented MXene fiber with vertically and horizontally aligned flakes. This unique structure enables significant water-induced curling deformation, paving the way for advanced stimuli-responsive devices.

Keywords:
MXeneMXene fiberMXene orientationcrystal orientationinformation device

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Advanced Materials

Background:

  • MXene flake orientation is crucial for assembly performance, influencing electrical conductivity, mechanical strength, and transport properties.
  • Existing horizontal or vertical orientations offer distinct benefits but are mutually exclusive and lack stimuli-responsive deformation due to structural symmetry.

Purpose of the Study:

  • To engineer a novel Janus-oriented MXene fiber with asymmetric flake alignment.
  • To investigate the stimuli-responsive deformation capabilities of the Janus-oriented MXene fiber.
  • To demonstrate the application of this fiber in event-triggered logic gates and warning systems.

Main Methods:

  • Fabrication of Janus-oriented MXene fibers with vertically and horizontally aligned flakes.
  • Characterization of mechanical properties, electrical conductivity, and volume expansion behavior.
  • Construction of a logic gate and a dual-mode water immersion warning system.

Main Results:

  • The Janus-oriented MXene fiber exhibited good mechanical properties and high electrical conductivity.
  • Asymmetric volume expansion between the two orientations induced a pronounced curling deformation up to 2100% length change upon water stimulus.
  • A functional event-triggered logic gate was successfully constructed, demonstrating a dual-mode warning system with light and Bluetooth signaling.

Conclusions:

  • The Janus orientation strategy overcomes limitations of traditional MXene assemblies, enabling significant stimuli-responsive deformation.
  • The developed Janus MXene fiber holds promise for advanced MXene-based information devices and sensors.
  • This work provides a new avenue for orientation engineering in MXene materials for diverse applications.