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Graphene-Based Bionic Composites with Multifunctional and Repairing Properties.

L Valentini1, S Bittolo Bon1, S Signetti2

  • 1Dipartimento di Ingegneria Civile e Ambientale, Università di Perugia , UdR INSTM, Strada di Pentima 4, 05100 Terni, Italy.

ACS Applied Materials & Interfaces
|March 15, 2016
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Summary

Researchers developed a novel bionic composite using yeast fermentation and graphene nanoplatelets. This self-healing material enhances mechanical and electrical properties, converting light into electrical signals for bioelectronic devices.

Keywords:
biohybrid compositesfunctional propertiesgrapheneself-repairing

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Area of Science:

  • Materials Science
  • Biotechnology
  • Nanotechnology

Background:

  • Yeast fermentation is a biological process with potential for material synthesis.
  • Graphene nanoplatelets offer unique mechanical and electrical properties.
  • Bio-inspired materials are increasingly explored for advanced applications.

Purpose of the Study:

  • To develop a novel bionic composite using yeast fermentation.
  • To investigate the integration of graphene nanoplatelets with Saccharomyces cerevisiae cell walls.
  • To evaluate the mechanical, electrical, and self-healing properties of the resulting composite.

Main Methods:

  • Yeast fermentation of Saccharomyces cerevisiae extract with added graphene nanoplatelets.
  • Formation and characterization of the composite film.
  • Numerical simulations to determine mechanical properties (fracture strength, Young's modulus).
  • Assessment of self-healing capabilities upon surface damage.

Main Results:

  • Successful coupling of graphene nanoplatelets to yeast cell walls, forming a composite film.
  • Enhanced mechanical and electrical properties of the composite.
  • Demonstrated capability of converting light stimuli into electrical signals.
  • Observed self-healing of surface cracking by graphene nanoplatelets, restoring properties.

Conclusions:

  • A novel self-healable bionic composite was successfully fabricated using yeast fermentation and graphene.
  • The composite exhibits improved material properties and light-to-electrical signal conversion.
  • Potential applications include self-healable bioelectronic devices and microorganism-based biosensors.