Authors
Zhandong Mu, Wen Teng, Wei Guo, Qiang Wang, Chen Chen, Zhibo Liu, Yongfeng Wang, Ning Kang, Chuan Xu, Wencai Ren
Published in
Science bulletin. Aug 26, 2026. Epub Aug 26, 2026.
Abstract
In the past decade, chemical vapor deposition (CVD)-grown ultrathin Mo2C crystals have attracted extensive interest for applications in two-dimensional superconductivity, electrocatalysis, and heterojunctions. However, conventional growth methods suffer from low growth rates, limiting large-area fabrication, and the air stability of ultrathin Mo2C remains poorly understood. Here, rapid growth of ultrathin Mo2C single crystals is achieved via CVD using a bilayer Cu/MoCx substrate. The combination of a pre-carburized MoCx substrate and a reduced CH4/H2 ratio is identified as the key factor enabling fast growth by effectively regulating the supply of Mo and C. A lateral growth rate of up to 8.3 μm/min at 1090 °C, exceeding previously reported values by more than fourfold, is achieved, while ultrathin Mo2C crystals with lateral sizes up to ∼320 μm are obtained at 1086 °C by prolonging the growth time. Despite the rapid growth, the ultrathin Mo2C crystals exhibit high crystalline quality, smooth surfaces, and robust superconductivity. Moreover, their air stability is systematically investigated, revealing no detectable oxidation or degradation after ∼150 months of air exposure, while their superconductivity remains well preserved. These results demonstrate the exceptional growth efficiency and air stability of ultrathin Mo2C, highlighting its strong potential for future applications, particularly in nanomechanical resonators.
PMID:
42705985
Bibliographic data and abstract were imported from PubMed on 08 Sep 2026.
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