Abstract
Low-pressure chemical vapour deposition (LPCVD) has been used to grow multi-walled carbon nanotubes (MWCNTs) on a silicon (Si) substrate. The Si substrate is coated with iron (Fe) nanoparticles at different times of deposition at a power of 100 W (W) by using Radio Frequency (RF) sputtering. In this paper, we have prepared MWCNTs with different thicknesses of Fe nanoparticles. To enhance the field emission properties, we coat the surface of MWCNTs with Zinc oxide (ZnO) nanoparticles for 5 min at 100 W power by using the RF sputtering technique. The growth of MWCNTs and the attaching of ZnO nanoparticles on MWCNTs were substantiated by scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, Raman spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. The field emission studies of ZnOx–Fex@MWCNTs (where x represents 5 min) nanostructures show that the current density increases remarkably. Compared to other field emitters such as MWCNTs and ZnO-attached MWCNTs, the ZnO attached MWCNTs had less iron thickness MWCNTs field emitters are better field emitters with lower turn-on voltage, higher current density, higher field enhancement factor, and better repeatability, and they also show good stability over a period of 15 h.
| Original language | English |
|---|---|
| Article number | 163 |
| Journal | Journal of Materials Science: Materials in Electronics |
| Volume | 34 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jan 2023 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics
- Electrical and Electronic Engineering