Surface graphitization of diamond nanotips induced by field-emission current
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-04-04 |
| Journal | Applied Physics Letters |
| Authors | Victor I. Kleshch, V. Porshyn, P. Serbun, Anton S. Orekhov, Š . Š . ŠŃŠ¼Š°Š³ŠøŠ»Š¾Š² |
| Institutions | Russian Academy of Sciences, Federal Scientific Research Centre Crystallography and Photonics |
| Citations | 13 |
Abstract
Section titled āAbstractāSurface graphitization as a result of Joule heating by a field-emission (FE) current is revealed for needlelike diamond nanotips. The apex temperature and electrical resistance of the diamond needles during FE were measured by electron spectroscopy. Transmission electron microscopy indicated that the diamond structure in the near-surface layer was transformed into well-ordered graphene layers after FE with currents of up to 30 Ī¼A. The resulting structure can be viewed as a multi-walled carbon nanotube (MWCNT) having a diamond core. Thus, the observed FE behavior exhibited by the graphitized diamond needles is qualitatively similar to that of MWCNTs. On the other hand, due to its outstanding thermal conductivity, the diamond core ensures an efficient Joule heat dissipation, which provides better emission stability and higher currents, up to at least 225 Ī¼A. It makes these graphitized diamond needles promising candidates for high-brightness point electron sources required for various applications, e.g., in electron microscopy or scanning electron lithography.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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