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Fast scanning growth of high-quality graphene films on Cu foils fueled by dimeric carbon precursor
Nano Research 2023, 16 (10): 12246-12252
Published: 22 June 2023
Downloads:72

Carbon source precursor is a critical factor governing chemical vapor deposition growth of graphene films. Methane (CH4), has been the most commonly used precursor in the last decade, but it presents challenges in terms of decomposition efficiency and growth rate. Here we thoroughly evaluated acetylene (C2H2), a precursor that is probably for providing carbon dimer (C2) species, for fast growth of large-scale graphene films. We find that the graphene growth behaviors fueled by C2H2 exhibit unconventional localized growth behavior with significant advantages in terms of high growth rate, which mainly ascribe to the as-decomposed C2 species. Therefore, a C2-fueled scanning growth strategy is proposed, and the fast scanning growth rate of 40 cm/min was experimentally demonstrated. This growth strategy is compatible with the approach of unidirectional growth of single-crystal graphene films, and the as-grown graphene films are of high-quality. This work demonstrates a reliable and promising strategy for the rapid synthesis of high-quality graphene film and may pave the avenue to cost-effective mass production of graphene materials in the roll-to-roll system.

Research Article Issue
Porous-structure engineered spacer for high-throughput and rapid growth of high-quality graphene films
Nano Research 2022, 15 (11): 9741-9746
Published: 01 July 2022
Downloads:69

Chemical vapor deposition (CVD) in conjunction with batch-to-batch manufacturing process is considered as the most promising technical route for mass-production of high-quality graphene films. To improve the space utilization of the CVD chamber and increase the throughput per batch, stacking of the Cu foil substrates is efficient, but suffers from the problems of adjacent fusion and the poor mass-transfer. Here, we demonstrate an efficient strategy for high-throughput and rapid growth of high-quality graphene by alternate stacking of Cu foils and porous carbon fiber paper (CFP). Relying on the unhindered mass-transfer through the pores of CFPs, full-covered high-quality graphene films on compact-stacked Cu foils were achieved within 2 min. Computational fluid dynamics (CFD) simulation and isotope labeling technique were performed to explore the gas diffusion and graphene growth process in the confined space of the Cu-CFP stacks. This work provides a feasible method for industrial production of graphene films, which may also be used for batch production of other two-dimensional materials.

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