Size dependent surface reconstruction in detonation nanodiamonds.
Shery L Y Chang1, Christian Dwyer, Eiji Ōsawa
1John M. Cowley Center for High Resolution Electron Microscopy, Arizona State University, Tempe, USA. shery.chang@asu.edu.
Nanoscale Horizons
|April 8, 2020
Summary
Surface reconstructions in detonation-synthesized nanodiamonds smaller than 3 nm show size-dependent aliphatic character. This finding is crucial for controlling nanodiamond functionalization in biomedical applications.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Nanometer-sized diamond particles are vital for biomedical applications.
- The surface properties of nanodiamonds are critical for their successful functionalization.
Purpose of the Study:
- To investigate surface reconstructions in detonation-synthesized nanodiamonds.
- To understand how size and shape influence nanodiamond surface properties.
Main Methods:
- High-resolution transmission electron microscopy (HRTEM).
- Electronic structure calculations.
Main Results:
- Sub-3 nm nanodiamonds exhibit size- and shape-dependent surface reconstructions.
- These small nanodiamonds show a higher fraction of sp2+x bonding, indicating aliphatic character.
- Surface charge and particle size influence nanodiamond performance.
Conclusions:
- The study reveals unique surface characteristics of sub-3 nm nanodiamonds.
- Understanding these reconstructions offers a pathway to improved functionalization control.
- Tailoring nanodiamond size can optimize their use in biomedical fields.
