Size dependent surface reconstruction in detonation nanodiamonds

Lan-Yun Chang, Christian Dwyer, Eiji Osawa, Amanda S. Barnard

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)213-217
Number of pages5
JournalNanoscale Horizons
Volume3
Issue number2
DOIs
StatePublished - Mar 1 2018

ASJC Scopus subject areas

  • Materials Science(all)

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