2026-11-13 — 2026-11-15  |  浙江省乐清市
Li Xuesong Invited

Li Xuesong

Professor
Shenzhen Institute for Advanced Study, UESTC
China
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Report Topic

Ultrafast Graphene Film Growth and AI-Assisted Rapid Characterization

Roll-to-roll chemical vapor deposition (R2R-CVD) is the core technological route for continuous, scalable production of graphene films, yet its industrialization has long been constrained by the inherent trade-off between growth rate and film quality. In atmospheric-pressure CVD, the thick boundary layer and low diffusion coefficient require a high CH₄ partial pressure to maintain sufficient carbon flux, but a high CH₄ partial pressure in turn intensifies gas-phase side reactions and introduces defects. Low-pressure CVD suppresses gas-phase reactions, but an excessively low absolute CH₄ partial pressure leaves the surface carbon concentration insufficient to sustain continuous growth. This report presents a systematic study of the pressure-dependent growth behavior of graphene in an industrial-scale R2R-CVD system, combined with two gas-atmosphere control strategies, namely Cu foil pre-oxidation and hydrogen-free precursor chemistry. This approach enables continuous monolayer graphene growth on Cu foil at meter-per-minute rates: monolayer coverage >90% with I<sub>D</sub>/I<sub>G</sub> < 5% at 1 m/min, and ~80% monolayer coverage with I<sub>D</sub>/I<sub>G</sub> ~20% at 2 m/min, together with uniformity verification over a 60 m long roll. This work clarifies the distinct roles of the CH₄ partial pressure, the total pressure, and the gas atmosphere in graphene CVD, and provides a scalable technological pathway toward industrial production of high-throughput, high-quality graphene. This report also introduces a rapid image-recognition-based strategy for evaluating the transfer completeness of graphene films, and further discusses the application of AI assistance in graphene film preparation.

Biography

Li Xuesong, a professor at the University of Electronic Science and Technology of China and Shenzhen Institute for Advanced Study, University of Electronic Science and Technology of China, is a highly cited research (Clarivate). He is the inventor of the method of synthesizing large-area graphene films on copper foil using chemical vapor deposition of methane. Bachelor's degree in Mechanical Engineering and Master's degree in Materials Processing Engineering from Tsinghua University, and PhD in Materials Engineering from Rensselaer Polytechnic Institute. He has conducted postdoctoral and associate research scientist at the University of Texas at Austin, IBM T.J. Watson Research Institute, and Yale University. His research field is the preparation and application of graphene films. More than 80 SCI articles have been published in top journals such as Science and Nature, with over 31000 SCI citations. His work on Large area synthesis of high quality and uniform graphene films on copper foils, published in Science in 2009, was selected by Science as one of the major breakthroughs of 2009, with over 10000 citations. The current research and production mainly use this technology for the preparation of graphene films.