Graphite to diamond phase transition induced by UV radiation
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-10-03 |
| Authors | Ana I. GĆ³mez de Castro |
| Institutions | Universidad Complutense de Madrid |
Abstract
Section titled āAbstractāGraphite and diamond are the two most common allotropes of solid carbon. Graphite is abundant in nature, diamond is much less abundant and has very much demanded characteristics such as its hardness and its properties as semiconductor: wide bandgap (5.45 eV) and high thermal conductivity (22W/cmK). Chemical vapor deposition (CVD) is often used by the industry to grow diamonds. However, nanodiamonds can also be produced by inducing the phase transition from the sp<sup>2</sup> layered structure of graphite to the sp<sup>3</sup> cubic structure of diamond using UV radiation. The emission of photoelectrons results in a redistribution of the electrons from the graphite π bands to the interlayer band and a distortion of the graphitic lattice that drives at the sp<sup>2</sup> to sp<sup>3</sup> transition. In this contribution, further details on the distribution and structure of the nanodiamonds produced by this means are provided.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
Section titled āReferencesā- 2006 - Instability of graphite structure induced by excited holes