Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate

Chitengfei Zhang, Zegao Wang, Rong Tu, Mingdong Dong, Jun Li, Meijun Yang, Qizhong Li, Ji Shi, Haiwen Li, Hitoshi Ohmori, Song Zhang, Lianmeng Zhang, Takashi Goto

Research output: Contribution to journalArticle

Abstract

The single-crystal α-Mo2C nanosheets was first achieved on liquid copper by chemical vapor deposition in 2015. However, the other single-crystal transition-metal carbide nanosheets have not been reported yet. Here, we demonstrate the chemical vapor deposition of single-crystal VC nanosheets with the maximum size of 77 μm on a unique stacked metal substrate. The thickness of VC crystals can be controlled from 12 to 227 nm by changing the deposition pressure (Pd). The reduced Pd decreased the growth rate parallel and perpendicular to the [0 1¯ 1] zone axis. When the Pd was 5000 Pa, the well-aligned single-crystal VC arrays with the thickness of 12 ± 4 nm was obtained. The effect of the hydrogen flow (f) on VC morphology was also discussed. Due to the growth of VC complied to the mass-transport-limited process under high f, the VC crystals tended to be dendrite with the increase of the f. This study could pave a new way for controlling growth of transition-metal carbide nanosheets with tunable thickness and morphology.

Original languageEnglish
Article number143998
JournalApplied Surface Science
Volume499
DOIs
Publication statusPublished - Jan 1 2020

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

Fingerprint Dive into the research topics of 'Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate'. Together they form a unique fingerprint.

  • Cite this

    Zhang, C., Wang, Z., Tu, R., Dong, M., Li, J., Yang, M., Li, Q., Shi, J., Li, H., Ohmori, H., Zhang, S., Zhang, L., & Goto, T. (2020). Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate. Applied Surface Science, 499, [143998]. https://doi.org/10.1016/j.apsusc.2019.143998