As Professor Zhongfan Liu from Peking university always said, “fabrication determines future”. 7 To realize the ultimate goal of 2D materials, fabrication matters a lot and serves as the first step. However, only materials that meet the requirements of industrial production can occupy the potential material market. 6 On the basis of the development of graphene, it is highly desirable that graphene would revolutionize the industry. 6–10 Taking the most typical 2D material graphene as an example, great advances with respect to its synthesis method and relevant unique properties have progressed inspiringly since it was first isolated. 1–5 In the past decades, significant developments have been witnessed in the preparation, characterization and application of 2D materials. Introduction 2D materials have emerged as star materials for applications in chemistry, materials science and physics owing to their extraordinary and fascinating property profiles. His research interests mainly focus on the chemical vapor deposition synthesis of 2D materials, and their further properties and applications.ġ. He received his PhD from the Institute of Chemistry, Chinese Academy of Sciences in 2015. Before that, he carried out research at the National University of Singapore and Singapore University of Technology and Design. Her research interests mainly focus on the controlled synthesis of 2D materials, and their further properties and biological applications.ĭechao Geng is a full Professor at the Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University since 2019. ![]() She received her PhD from the Institute of Chemistry, Chinese Academy of Sciences in 2016. Before that, she conducted postdoctoral studies at the University of Electronic Science and Technology of China. Lin Li has been an Assistant Professor at Institute of Molecular Plus, Tianjin University since 2020. Her current research is focused on the chemical vapor deposition synthesis of 2D materials and related heterostructures. Currently, she is pursuing a Master's degree at Tianjin University under the supervision of Prof. Ziyi Han received her Bachelor's degree at the College of Chemistry and Material Science, Hebei Normal University in 2021. Finally, we outline the current challenges, and a bright development in the future of the continuous orientated growth of scaled 2D crystals should be envisioned. Furthermore, the growth mechanism for the 2D single crystals is presented and the following application in electronics, optics and antioxidation coatings are also discussed. Then, other typical 2D materials (including graphene, h-BN, and TMDs) are given in terms of the unique feature under the guideline of the multi-seed growth approach. In this review, we present the detailed cases of growing the representative monocrystalline 2D materials via the single-seed CVD method as well as show its advantages and disadvantages in shaping 2D materials. Currently, the latter is recognized as a more effective method to meet the demand of industrial production, whereas the oriented domains can seamlessly merge into a continuous single-crystal film in a short time. Two types of strategies have been developed: one is single-seed method, which focuses on the ultimate control of the density of nucleation into only one nucleus and the other is a multi-seed approach, which concentrates on the precise engineering of orientation of nuclei into a uniform alignment. Recently, chemical vapor deposition (CVD) shows great promise for the synthesis of high-quality 2D materials owing to high controllability, high scalability and ultra-low cost. Single-crystal 2D materials have attracted a boom of scientific and technological activities.
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