Size dependent surface reconstruction in detonation nanodiamonds

作者：Chang Shery L Y^*; Dwyer Christian; Osawa Eiji; Barnard Amanda S

来源：Nanoscale Horizons, 2018, 3(2): 213-217.

DOI：10.1039/c7nh00125h

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 detonationsynthesized 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 sp(2+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.

• 出版日期2018-3
• 单位CSIRO