Scalable Reshaping of Diamond Particles via Programmable Nanosculpting

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Diamond particles possess unique properties but large-scale production of custom shapes is difficult due to their inertness and hardness.
• Existing methods for diamond shaping are often complex and not scalable for industrial applications.

Purpose of the Study:

• To demonstrate a scalable and economical method for producing diamond particles with well-defined shapes.
• To explore the use of air oxidation for precise nanosculpting of diamond surfaces.
• To create a shape library for designing customized diamond particles for specific technological needs.

Main Methods:

• Utilizing air oxidation, a standard diamond purification technique, to selectively etch diamond surfaces.
• Exploiting differences in crystal facet reactivity and internal defects to control oxidation patterns.
• Employing experimental observations and Monte Carlo simulations to guide shape fabrication and create a comprehensive shape library.

Main Results:

• Achieved scalable production of diverse diamond shapes, including spheres, twisted surfaces, pyramids, nanoflowers, and porous polygons.
• Nanosculpted diamonds exhibited enhanced features, leading to superior performance in various applications compared to raw diamonds.
• Developed a predictive shape library correlating fabrication parameters with resulting diamond morphologies.

Conclusions:

• Air oxidation offers a simple, economical, and scalable approach for precisely shaping diamond particles.
• Custom-shaped diamond particles with tailored features can significantly benefit anticounterfeiting, optical, and other advanced technologies.
• The developed methodology and shape library provide a pathway for designing and fabricating functional diamond nanomaterials.