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The <100> oriented single crystalline Zirconium Carbide (ZrC) nanowires were controllably synthesized on a graphite substrate by chemical vapor deposition (CVD) with optimized growth parameters involving zirconium tetrachloride (ZrCl4), flow of methane (CH4) and growth temperature. The length of nanowires is above 10 µm while the diameter is smaller than 100 nm. A single ZrC nanowire was picked up and fixed on a tungsten tip for field emission measurement. After surface pretreatments, a sharpened and cleaned ZrC nanowire emitter showed a high emission current density of 1.1×1010 A m-2 at a low turn-on voltage of 440 V. The field emission is stable for 150 mins with a fluctuation of 1.77%. This work provides an effective method for syn-thesizing and stabilizing single crystalline ZrC nanowire emitters as an electron source for elec-tron-beam applications.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: zirconium carbide, nanowire, electric field emission, chemical vapor deposition

Date published: 2024-09-27

Publisher: MDPI AG

Journal:

• Nanomaterials (ISSN: 20794991) vol. 14 issue. 19 1567

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Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.3390/nano14191567

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Updated at: 2024-10-28 16:30:16 +0900

Published on MDR: 2024-10-28 16:30:17 +0900