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Deagglomeration of Detonation Nanodiamonds

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It is well known that a commercial powder of detonation nanodiamonds (DND) and their aqueous suspensions consist of agglomerates of 4–5 nm crystalline diamond grains. We have submitted a method for production of stable mono-disperse hydrosol of 4 nm isolated DND particles. The method includes deep purification commercial DND from metal impurities and appropriate control of its residual amount by electronic spin resonance, annealing of purified DND in air and centrifugation. The main result of the study demonstrates that centrifuging of a DND hydrosol of particles with a high negative zeta potential produced by deep purification and air annealing results into breakup of the agglomerates. A model explained high strength of the DND agglomerates has been discussed.
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Keywords: AGGLOMERATION; DETONATION NANODIAMOND; HYDROSOL; MONO-DISPERSE SUSPENSION; SIZE DISTRIBUTION; ZETA-POTENTIAL

Document Type: Short Communication

Publication date: February 1, 2011

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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