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Issue 9, 2020
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Dynamic self-assembly of detonation nanodiamond in water

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Abstract

Nanodiamonds are increasingly used in many areas of science and technology, yet, their colloidal properties remain poorly understood. Here we use direct imaging as well as light and X-ray scattering reveal that purified detonation nanodiamond (DND) particles in an aqueous environment exhibit a self-assembled lace-like network, even without additional surface modification. Such behaviour is previously unknown and contradicts the current consensus that DND exists as mono-dispersed single particles. With the aid of mesoscale simulations, we show that the lace network is likely the result of competition between a short-ranged electrostatic attraction between faceted particles and a longer-ranged repulsion arising from the interaction between the surface functional groups and the surrounding water molecules which prevents complete flocculation. Our findings have significant implications for applications of DND where control of the aggregation behaviour is critical to performance.

Graphical abstract: Dynamic self-assembly of detonation nanodiamond in water

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Supplementary files

Article information


Submitted
21 Oct 2019
Accepted
11 Feb 2020
First published
14 Feb 2020

Nanoscale, 2020,12, 5363-5367
Article type
Communication

Dynamic self-assembly of detonation nanodiamond in water

S. L. Y. Chang, P. Reineck, D. Williams, G. Bryant, G. Opletal, S. A. El-Demrdash, P. Chiu, E. Ōsawa, A. S. Barnard and C. Dwyer, Nanoscale, 2020, 12, 5363
DOI: 10.1039/C9NR08984E

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