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3D-printed graphene/polymer structures for electron-tunneling based devices.

Deisy C Carvalho Fernandes1, Dylan Lynch1, Vikas Berry2

  • 1Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL, USA.

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|July 11, 2020
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Summary
This summary is machine-generated.

Researchers developed a 3D printed tensile gauge using graphene/polylactic acid composite. This device utilizes electron tunneling for strain detection, offering a novel approach for on-demand electronic applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • 3D printing enables custom micro-architectures with electronic materials.
  • Understanding electronic transport is crucial for on-demand device fabrication.

Purpose of the Study:

  • To demonstrate 3D printing of a graphene/polylactic acid composite for a functional tensile gauge.
  • To investigate the electron-tunneling mechanism in 3D printed conductive structures under strain.

Main Methods:

  • Controlled nozzle-extrusion 3D printing of graphene/polylactic acid.
  • Characterization of electronic transport properties (Fowler Nordheim mechanism).
  • Measurement of gauge sensitivity under mechanical strain.

Main Results:

  • Fabricated a 3D printed tensile gauge with tunable electron-tunneling barrier width.
  • Observed Fowler Nordheim tunneling with specific parameters (0.79-0.95 nm width, 2.66 × 10^12/cm^2 carrier concentration).
  • Demonstrated high sensitivity (2.59 Ω/Ω%) correlating strain-induced changes in electron flux.

Conclusions:

  • 3D printed graphene/polymer composites can function as sensitive tensile gauges.
  • Electron-tunneling models are applicable to conductive 3D printed structures.
  • This approach paves the way for next-generation on-demand printed electronic and electromechanical devices.