Issue 2, 2018

Size dependent surface reconstruction in detonation nanodiamonds

Abstract

Nanometer-sized diamond particles are used in bio-medical applications, where the nature of the nanodiamond surfaces is crucial to achieving correct functionalisation. Herein, using high-resolution transmission electron microscopy and electronic structure calculations, we study the surface reconstructions that occur in detonation-synthesized nanodiamonds. Our results show that particles smaller than 3 nm exhibit size- and shape-dependent surface reconstructions, and that the surfaces can exhibit a higher-than-expected fraction of sp2+x bonding. This indicates an aliphatic character for sub-3 nm nanodiamond particles. Such behaviour impacts the functionality of nanodiamonds, where both size and surface charge can drive performance. Our observations offer a potential strategy for better functionalization control via the size range of the particles.

Graphical abstract: Size dependent surface reconstruction in detonation nanodiamonds

Supplementary files

Article information

Article type
Communication
Submitted
16 Aug. 2017
Accepted
15 Dec. 2017
First published
15 Dec. 2017

Nanoscale Horiz., 2018,3, 213-217

Size dependent surface reconstruction in detonation nanodiamonds

S. L. Y. Chang, C. Dwyer, E. Ōsawa and A. S. Barnard, Nanoscale Horiz., 2018, 3, 213 DOI: 10.1039/C7NH00125H

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