Dispersible Diamond Nanoparticles 5–10 nm ≥97% ATOMFAIR®

How does the surface functionalization of 5-10 nm dispersible diamond nanoparticles affect dispersion stability in polar solvents compared to unmodified nanodiamonds?

The product is rich in hydroxyl and carboxyl groups, which enhance dispersion stability in polar solvents such as water and alcohols through hydrogen bonding and electrostatic repulsion. This surface chemistry reduces agglomeration compared to unmodified nanodiamonds, which lack these functional groups and tend to form larger clusters. The 5-10 nm primary particle size further supports colloidal stability by minimizing gravitational settling.

Can these 5-10 nm diamond nanoparticles be directly integrated into polymer or epoxy matrices for composite reinforcement without additional surface treatment?

Yes, the inherent hydroxyl and carboxyl groups on the nanoparticle surface enable covalent bonding with epoxy resins and polar polymers, potentially eliminating the need for additional silanization or grafting steps. However, compatibility with non-polar matrices like polyolefins may still require surface modification. The 5-10 nm diameter ensures high surface area for interfacial interaction, but uniform dispersion must be verified through sonication or shear mixing protocols.

What storage and handling precautions are required to maintain the ≥97% purity and surface chemistry of 1 g batches of 5-10 nm dispersible diamond nanopowder?

Store the nanopowder in a sealed, inert container under dry conditions to prevent moisture adsorption and oxidation of surface hydroxyl and carboxyl groups. Avoid exposure to temperatures above 100°C, which can desorb functional groups and reduce dispersibility. Use a glovebox or fume hood during handling to minimize airborne contamination, as the 5-10 nm particles have high surface energy and can adsorb atmospheric impurities.