Article
Materials Science, Multidisciplinary
Xiuli Gao, Runhan Xiao, Yanhui Zhang, Zhiying Chen, He Kang, Shuang Wang, Sunwen Zhao, Yanping Sui, Guanghui Yu, Wei Zhang
Summary: In this work, a series of experiments were conducted to investigate the etching effect of hydrogen and oxygen on graphene on Cu, along with their roles in graphene growth.
Review
Chemistry, Multidisciplinary
Minghui Li, Lin Li, Yixuan Fan, Fei Jiao, Dechao Geng, Wenping Hu
Summary: This article provides an overview of etching techniques for 2D materials and their applications in electronic device manufacturing, growth mechanism research, and grain boundary visualization. It introduces commonly used etching techniques and etching modes, and elucidates the etching mechanism. Additionally, it discusses key issues in the etching process and envisions future developments.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Yawen Yuan, Yishi Wang, Shasha Liu, Xuxue Zhang, Xinzheng Liu, Changhui Sun, Dong Yuan, Yan Zhang, Xiaorong Cao
Summary: Direct growth of high-quality graphene films on glasses by chemical vapor deposition (CVD) method has emerged as a promising route to produce smart glass equipment, with tunable quality, excellent film uniformity, and potential scalability. CF4 plasma etching-assisted CVD method enables the direct synthesis of superhydrophobic light-transmitting graphene glass, with excellent hydrophobicity and transmittance, showing great potential in transparent conductors, smart windows, simple heating devices, and solar-cell electrode fields.
Article
Chemistry, Multidisciplinary
Hyeyeon Cho, Yelim Son, Hee Cheul Choi
Summary: Controlling the stacking angle of bilayer graphene is essential for its fundamental studies and applications. This study discovered that graphene rotates during the chemical vapor deposition process, and this rotation can be used to control the stacking angle. The rotation of graphene is mainly influenced by its edge state, which can be tuned by the growth temperature. Experimental results combined with theoretical calculations confirmed the rotation phenomenon. By controlling the growth temperature, highly selective growth of specific stacking angles of bilayer graphene can be achieved.
Article
Multidisciplinary Sciences
Le Cai, Wanzhen He, Xudong Xue, Jianyao Huang, Ke Zhou, Xiahong Zhou, Zhiping Xu, Gui Yu
Summary: Intrinsic graphene is limited in electronic applications due to its semi-metallic characteristics, while graphene nanoribbons (GNRs) are considered promising semiconductors with bandgap-opening features. This study reports a template-free CVD strategy for growing large-area, high-quality, self-aligned GNR arrays on liquid copper, offering operational simplicity and efficiency for potential use in integrated circuits.
NATIONAL SCIENCE REVIEW
(2021)
Article
Chemistry, Multidisciplinary
Fengning Liu, Jichen Dong, Na Yeon Kim, Zonghoon Lee, Feng Ding
Summary: The study presents a general model to elucidate the formation mechanism of grain boundaries in 2D materials and successfully synthesizes twinned 2D materials on a liquid substrate, demonstrating the growth of twinned graphene. Well-defined twin boundaries in graphene can be selectively etched by hydrogen gas due to preferential adsorption of hydrogen atoms, paving the way to grow various 2D nanostructures with controlled grain boundaries.
Article
Chemistry, Physical
Xiucai Sun, Xiaoting Liu, Zhongti Sun, Xintong Zhang, Yuzhu Wu, Yeshu Zhu, Yuqing Song, Kaicheng Jia, Jincan Zhang, Luzhao Sun, Wan-Jian Yin, Zhongfan Liu
Summary: This study reveals the importance of vapor catalysis in superclean graphene growth through density functional theory calculations, an ideal gas model, and a designed experiment. The study finds that the vapor mainly consists of Cui clusters, which have a significant impact on graphene growth. DFT calculations show that Cu clusters exhibit strong capabilities for adsorption, dehydrogenation, and decomposition, providing a sufficient supply of active carbon atoms for rapid graphene growth. Experimental validation confirms that increasing the amount of Cu vapor improves the growth rate and surface cleanliness of graphene.
Article
Materials Science, Multidisciplinary
Yijian Liang, Wenjing Zhang
Summary: This study successfully achieved large-area adlayer-free graphene growth by using the two-step 'bottom-up-etching' method. Experimental results showed that increasing the temperature in the second step significantly accelerated the etching of the bottom graphene layer. A growth model for adlayer-free monolayer graphene on Cu foil is proposed.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Engineering, Environmental
Yue Wang, Fangzhu Qing, Yi Jia, Yinwu Duan, Changqing Shen, Yuting Hou, Yuting Niu, Haofei Shi, Xuesong Li
Summary: The breathing CVD method effectively utilizes reactor space to produce large-area graphene films with a small reactor. This method significantly increases the size and throughput of graphene films compared to conventional methods.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Wataru Kubota, Ryoya Yamaoka, Toru Utsunomiya, Takashi Ichii, Hiroyuki Sugimura
Summary: The vapor-phase etching assisted by graphene oxide enhances the etching reaction without the formation of a porous layer, and microcontact printing of graphene oxide can be combined with silicon etching to form micrometer-sized pores in desired areas.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Shiwei Wang, Chunyang Zheng, Xiucai Sun, Yixuan Zhao, Shengping Zhang, Qingqing Liu, Jiawei Yang, Yeshu Zhu, Jiaxin Shao, Mingyue Wei, Wanjian Yin, Jianbo Yin, Li Lin, Kaicheng Jia, Zhongfan Liu
Summary: An efficient method was demonstrated to synthesize centimeter-sized graphene films with over 80% bilayer ratio on confined Cu substrates. The obtained bilayer graphene films showed a 100% AB-stacking structure confirmed by transmission electron microscopy and Raman characterization. The high quality of the bilayer graphene films was also evidenced by tunable band-gap and uniform optical transmittance. This work provides new insights into graphene growth with controlled layer thickness and a new choice for AB-stacked bilayer graphene film production.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Chemistry, Multidisciplinary
Wenqian Yao, Hongtao Liu, Jianzhe Sun, Bin Wu, Yunqi Liu
Summary: This review provides a comprehensive overview of current challenges and opportunities for chemical vapor deposition (CVD) growth, characterization, and electrical properties of graphene depending on the layer number and twist angles. Various state-of-the-art innovations using the CVD method are presented, and the underlying growth mechanisms and characterization methods are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Chamseddine Bouhafs, Sergio Pezzini, Fabian R. Geisenhof, Neeraj Mishra, Vaidotas Miseikis, Yuran Niu, Claudia Struzzi, R. Thomas Weitz, Alexei A. Zakharov, Stiven Forti, Camilla Coletti
Summary: The study successfully synthesized rhombohedral graphene with a thickness of up to 9 layers, with alternating crystal domains identified in Raman spectroscopy. Microscopic and spectroscopic analyses suggest that rhombohedral-stacking formation is correlated to underlying copper step-bunching.
Article
Chemistry, Multidisciplinary
Sumeer R. Khanna, Michael G. Stanford, Ivan V. Vlassiouk, Philip D. Rack
Summary: In this study, CuxN1-x alloy thin films were used as catalysts for graphene growth at atmospheric pressure. By adjusting the alloy composition, the growth of graphene was controlled. The results showed that graphene primarily grew as a single layer when the Cu concentration (x) was above 69 at.%.
Article
Materials Science, Multidisciplinary
Jie Wang, Tengfei Fan, Jianchen Lu, Xiaoming Cai, Lei Gao, Jinming Cai
Summary: Graphene with different morphologies, such as dendrites, rectangle, and hexagon, has been grown on polycrystalline copper substrates using low-pressure chemical vapor deposition. The evolution of fractal graphene grown on the copper substrate has also been observed. The study investigates the changes in graphene morphology as a function of the methane to hydrogen volume ratio. Additionally, phenomena of stitching snow-like graphene and stacking graphene with different angles have been observed.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Dechao Geng, Huaping Wang, Gui Yu
ADVANCED MATERIALS
(2015)
Article
Nanoscience & Nanotechnology
Jie Xu, Weifeng Zhang, Dechao Geng, Yuan Liu, Huaping Wang, Nujiang Tang, Gui Yu
ADVANCED ELECTRONIC MATERIALS
(2015)
Article
Chemistry, Physical
Jianyi Chen, Wu Zhou, Wei Tang, Bingbing Tian, Xiaoxu Zhao, Hai Xu, Yanpeng Liu, Dechao Geng, Sherman Jun Rong Tan, Wei Fu, Kian Ping Loh
CHEMISTRY OF MATERIALS
(2016)
Article
Materials Science, Multidisciplinary
Dechao Geng, Xiaoxu Zhao, Linjun Li, Peng Song, Bingbing Tian, Wei Liu, Jianyi Chen, Dong Shi, Ming Lin, Wu Zhou, Kian Ping Loh
Article
Chemistry, Multidisciplinary
Xiaoxu Zhao, Deyi Fu, Zijing Ding, Yu-Yang Zhang, Dongyang Wan, Sherman J. R. Tan, Zhongxin Chen, Kai Leng, Jiadong Dan, Wei Fu, Dechao Geng, Peng Song, Yonghua Du, T. Venkatesan, Sokrates T. Pantelides, Stephen J. Pennycook, Wu Zhou, Kian Ping Loh
Article
Chemistry, Multidisciplinary
Dechao Geng, Birong Luo, Jie Xu, Yunlong Guo, Bin Wu, Wenping Hu, Yunqi Liu, Gui Yu
ADVANCED FUNCTIONAL MATERIALS
(2014)
Article
Chemistry, Multidisciplinary
Jianyi Chen, Yunlong Guo, Lili Jiang, Zhiping Xu, Liping Huang, Yunzhou Xue, Dechao Geng, Bin Wu, Wenping Hu, Gui Yu, Yunqi Liu
ADVANCED MATERIALS
(2014)
Article
Chemistry, Multidisciplinary
Dechao Geng, Lan Meng, Bingyan Chen, Enlai Gao, Wei Yan, Hui Yan, Birong Luo, Jie Xu, Huaping Wang, Zupan Mao, Zhiping Xu, Lin He, Zhiyong Zhang, Lianmao Peng, Gui Yu
ADVANCED MATERIALS
(2014)
Article
Multidisciplinary Sciences
Jianyi Chen, Yunlong Guo, Liping Huang, Yunzhou Xue, Dechao Geng, Hongtao Liu, Bin Wu, Gui Yu, Wenping Hu, Yunqi Liu, Daoben Zhu
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2014)
Review
Chemistry, Multidisciplinary
Dechao Geng, Gui Yu
MATERIALS HORIZONS
(2018)
Article
Chemistry, Multidisciplinary
Dechao Geng, Xiaoxu Zhao, Zhongxin Chen, Weiwei Sun, Wei Fu, Jianyi Chen, Wei Liu, Wu Zhou, Kian Ping Loh
ADVANCED MATERIALS
(2017)
Article
Chemistry, Physical
Huaping Wang, Enlai Gao, Peng Liu, Duanliang Zhou, Dechao Geng, Xudong Xue, Liping Wang, Kaili Jiang, Zhiping Xu, Gui Yu
Article
Chemistry, Multidisciplinary
Wei Liu, Mani Ulaganathan, Ibrahim Abdelwahab, Xin Luo, Zhongxin Chen, Sherman Jun Rong Tan, Xiaowei Wang, Yanpeng Liu, Dechao Geng, Yang Bao, Jianyi Chen, Kian Ping Loh
Article
Chemistry, Multidisciplinary
Jianyi Chen, Xiaoxu Zhao, Gustavo Grinblat, Zhongxin Chen, Sherman J. R. Tan, Wei Fu, Zijing Ding, Ibrahim Abdelwahab, Yi Li, Dechao Geng, Yanpeng Liu, Kai Leng, Bo Liu, Wei Liu, Wei Tang, Stefan A. Maier, Stephen John Pennycook, Kian Ping Loh
ADVANCED MATERIALS
(2018)
