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Inverted vortex fluidic exfoliation and scrolling of hexagonal-boron nitride
Ahmed Hussein Mohammed Al-Antaki1,2, Xuan Luo1, Thaar M D Alharbi1
1Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University Adelaide SA 5042 Australia colin.raston@flinders.edu.au.
RSC Advances
|May 6, 2022
Summary
This study introduces a novel method for hexagonal boron nitride (h-BN) exfoliation and scrolling using a vortex fluidic device (VFD) at a -45° tilt angle. This optimized VFD process enhances material flow and prevents build-up, improving h-BN production efficiency.
Area of Science:
- Materials Science
- Chemical Engineering
- Nanotechnology
Background:
- Hexagonal boron nitride (h-BN) is a 2D material with unique properties.
- Conventional vortex fluidic device (VFD) methods for h-BN exfoliation face challenges with material build-up.
- Optimizing VFD parameters is crucial for efficient h-BN production.
Purpose of the Study:
- To develop an improved VFD method for hexagonal boron nitride (h-BN) exfoliation and scrolling.
- To investigate the effect of VFD tilt angle on h-BN processing.
- To optimize VFD operating parameters for enhanced h-BN production.
Main Methods:
- Utilized a vortex fluidic device (VFD) operating under continuous flow.
- Employed a novel tilt angle of -45° relative to the horizontal.
- Systematically varied VFD parameters: flow rate, rotational speed, h-BN concentration, and solvent choice.
Main Results:
- The -45° tilt angle effectively prevented material build-up, unlike the conventional +45° angle.
- Downward flow aided by gravity facilitated material exit and h-BN exfoliation/scrolling.
- Water proved to be the most effective solvent, improving green chemistry metrics.
Conclusions:
- A -45° tilt angle in VFD processing is a superior strategy for h-BN exfoliation and scrolling.
- The optimized VFD method enhances efficiency and aligns with green chemistry principles.
- This technique offers a scalable approach for producing high-quality h-BN materials.
