Nonconductive layered hexagonal boron nitride exfoliation by bipolar electrochemistry

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Hexagonal boron nitride (h-BN) is an isoelectronic analogue of graphite with unique properties, attracting significant research interest.
• Existing methods for isolating few-layered h-BN nanosheets include chemical vapor deposition, solution-based exfoliation, and ball-milling.
• The bipolar electrochemical method, effective for graphite and other layered materials, has not been applied to insulators like h-BN.

Purpose of the Study:

• To report a novel, scalable, and time-efficient bipolar electrochemical method for direct exfoliation of bulk h-BN into few-layered nanosheets.
• To demonstrate the applicability of this method to non-conductive layered materials.

Main Methods:

• Utilized a solution-based bipolar electrochemical approach for exfoliation.
• Applied the method to bulk hexagonal boron nitride (h-BN).

Main Results:

• Successfully exfoliated bulk insulator h-BN into few-layered h-BN nanosheets.
• Established a scalable and time-efficient electrochemical exfoliation process for h-BN.

Conclusions:

• The electrochemical exfoliation of non-conductive h-BN using this method is feasible.
• This scalable technique opens avenues for applying bipolar electrochemistry to a wide range of non-conductive layered materials.
• The facile method provides an alternative platform for h-BN electrochemical exfoliation in diverse fields like electronics and biomedical science.