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Antagonistically Functionalized Diatom Biosilica for Bio-Triboelectric Generators.

Araz Rajabi-Abhari1, Jeehee Lee2, Rassoul Tabassian1

  • 1National Creative Research Initiative for Functionally Antagonistic Nano-Engineering, Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)
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Summary

Researchers enhanced biomaterial-based triboelectric nanogenerators (Bio-TENGs) using diatom frustules with amine and fluorine functionalizations. This antagonistic approach significantly boosts power generation for practical applications in electronics and sensors.

Keywords:
antagonistic functionalizationbite counterscellulose nanocrystalsdiatom frustulestriboelectric nanogenerators

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Biomaterials

Background:

  • Biomaterial-based triboelectric nanogenerators (Bio-TENGs) are promising for wearable electronics and implantable sensors.
  • Current Bio-TENGs exhibit insufficient power generation for practical applications.

Purpose of the Study:

  • To significantly enhance the output performance of Bio-TENG devices.
  • To develop an antagonistic approach using diatom frustules (DFs) with amine and fluorine chemical functionalizations.

Main Methods:

  • Diatom frustules (DFs) were treated with piranha solution to increase hydroxyl group density.
  • Tribo-positive and tribo-negative composite films were created using antagonistically functionalized DFs.
  • The tribo-positive composite comprised aminated DFs and cellulose nanocrystals (CNCs); the tribo-negative composite contained fluorinated DFs and polydimethylsiloxane (PDMS).

Main Results:

  • An antagonistically and chemically functionalized TENG (ACF TENG) achieved an output voltage of 248 V, a short-circuit current of 16.4 µA, and a power density of 2.01 W m⁻².
  • This performance is 16.6 times higher than a reference TENG (CNC:PDMS).
  • The ACF TENG demonstrated efficient performance with a contact area of 9.6 cm² under 8 N force and 5 Hz frequency.

Conclusions:

  • A simple antagonistic approach for chemical functionalization effectively enhances Bio-TENG power generation.
  • This method allows for manipulation of the tribo-polarity of bio-additives.
  • The findings pave the way for more powerful and practical Bio-TENG devices.