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 language | English |
|---|---|
| Article number | 143998 |
| Journal | Applied Surface Science |
| Volume | 499 |
| DOIs | |
| Publication status | Published - Jan 1 2020 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films
Cite this
Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate. / Zhang, Chitengfei; Wang, Zegao; Tu, Rong; Dong, Mingdong; Li, Jun; Yang, Meijun; Li, Qizhong; Shi, Ji; Li, Haiwen; Ohmori, Hitoshi; Zhang, Song; Zhang, Lianmeng; Goto, Takashi.
In: Applied Surface Science, Vol. 499, 143998, 01.01.2020.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Growth of self-aligned single-crystal vanadium carbide nanosheets with a controllable thickness on a unique staked metal substrate
AU - Zhang, Chitengfei
AU - Wang, Zegao
AU - Tu, Rong
AU - Dong, Mingdong
AU - Li, Jun
AU - Yang, Meijun
AU - Li, Qizhong
AU - Shi, Ji
AU - Li, Haiwen
AU - Ohmori, Hitoshi
AU - Zhang, Song
AU - Zhang, Lianmeng
AU - Goto, Takashi
PY - 2020/1/1
Y1 - 2020/1/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85073009291&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85073009291&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.143998
DO - 10.1016/j.apsusc.2019.143998
M3 - Article
AN - SCOPUS:85073009291
VL - 499
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
M1 - 143998
ER -