Production of Metal-Free Diamond Nanoparticles.

Area of Science:

• Materials Science
• Nanotechnology
• Quantum Physics

Background:

• Commercially available diamond nanoparticles often contain metal impurities.
• Existing production methods can introduce contaminants like iron oxide or nondiamond carbon.
• High-purity diamond nanoparticles are essential for advanced applications.

Purpose of the Study:

• To demonstrate the controlled production of high-quality, metal-free diamond nanoparticles.
• To investigate the impact of different milling materials on nanoparticle purity.
• To identify methods for producing customized diamond nanoparticles for quantum technologies.

Main Methods:

• Milling techniques using different materials (tempered steel, SiN).
• Analysis of contamination types and levels resulting from milling.
• Evaluation of impurity removal strategies.

Main Results:

• Milling with tempered steel results in difficult-to-remove iron oxide contamination.
• Milling with SiN reduces metal contamination but increases nondiamond carbon.
• The choice of milling material directly impacts the type and level of contaminants.
• Successful production of high-quality diamond nanoparticles is achieved.

Conclusions:

• Milling material selection is critical for controlling nanoparticle purity.
• Minimizing metal impurities is key to unlocking new possibilities for diamond nanoparticles.
• Customized, high-purity diamond nanoparticles can meet the demands of quantum applications.