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Multifunctional Applications Enabled by Fluorination of Hexagonal Boron Nitride.

Devashish Salpekar1, Peter Serles2, Guillaume Colas3

  • 1Department of Materials Science & NanoEngineering, Rice University, 6100 Main Street, Houston, TX, 77005, USA.

Small (Weinheim an Der Bergstrasse, Germany)
|May 21, 2024
PubMed
Summary

Chemically functionalizing hexagonal boron nitride (hBN) with fluorine enhances its properties. Fluorinated hBN (F-hBN) shows improved thermal conductivity, lubrication, and potential for microelectronics.

Keywords:
2D materialsdielectricsfunctionalizationhexagonal boron nitridelubricantnanofillers

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Two-dimensional (2D) materials offer unique properties compared to bulk materials.
  • Chemical functionalization is key to tuning 2D material properties for advanced applications.
  • Hexagonal boron nitride (hBN) is a chemically inert 2D ceramic with potential for functionalization.

Purpose of the Study:

  • To chemically functionalize hexagonal boron nitride (hBN) using gas-phase fluorination.
  • To investigate the impact of fluorine functionalization on hBN's properties and applications.
  • To explore F-hBN's utility in thermofluids, lubrication, and microelectronics.

Main Methods:

  • Gas-phase fluorination of hexagonal boron nitride (hBN).
  • Characterization of fluorine-functionalized hBN (F-hBN) properties.
  • Evaluation of F-hBN performance as a thermofluid additive and lubricant.

Main Results:

  • Fluorine functionalization led to interlayer expansion and increased polar surface charges in hBN.
  • F-hBN demonstrated over 75% enhancement in thermal conductivity and dispersibility.
  • F-hBN reduced friction by 31% and wear by 71% in steel tribological contacts.
  • F-hBN exhibited a permanent dipole moment, indicating microelectronic potential.

Conclusions:

  • Chemical functionalization of hBN significantly enhances its properties and expands its application range.
  • F-hBN shows promise as a high-performance additive for thermofluids and lubricants.
  • The permanent dipole moment of F-hBN opens possibilities for microelectronic devices and composite materials.