共查询到20条相似文献,搜索用时 15 毫秒
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Molecular Ordering: Selectivity of Threefold Symmetry in Epitaxial Alignment of Liquid Crystal Molecules on Macroscale Single‐Crystal Graphene (Adv. Mater. 40/2018) 下载免费PDF全文
Tian‐Zi Shen Seung‐Ho Hong Jae‐Hyun Lee Seog‐Gyun Kang Bomi Lee Dongmok Whang Jang‐Kun Song 《Advanced materials (Deerfield Beach, Fla.)》2018,30(40)
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Graphene: Controlled Growth of Single‐Crystal Twelve‐Pointed Graphene Grains on a Liquid Cu Surface (Adv. Mater. 37/2014) 下载免费PDF全文
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 (Deerfield Beach, Fla.)》2014,26(37):6519-6519
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Fabrication of Millimeter‐Scale,Single‐Crystal One‐Third‐Hydrogenated Graphene with Anisotropic Electronic Properties 下载免费PDF全文
Hui Chen De‐Liang Bao Dongfei Wang Yande Que Wende Xiao Guojian Qian Hui Guo Jiatao Sun Yu‐Yang Zhang Shixuan Du Sokrates T. Pantelides Hong‐Jun Gao 《Advanced materials (Deerfield Beach, Fla.)》2018,30(32)
Periodically hydrogenated graphene is predicted to form new kinds of crystalline 2D materials such as graphane, graphone, and 2D CxHy, which exhibit unique electronic properties. Controlled synthesis of periodically hydrogenated graphene is needed for fundamental research and possible electronic applications. Only small patches of such materials have been grown so far, while the experimental fabrication of large‐scale, periodically hydrogenated graphene has remained challenging. In the present work, large‐scale, periodically hydrogenated graphene is fabricated on Ru(0001). The as‐fabricated hydrogenated graphene is highly ordered, with a √3 × √3/R30° period relative to the pristine graphene. As the ratio of hydrogen and carbon is 1:3, the periodically hydrogenated graphene is named “one‐third‐hydrogenated graphene” (OTHG). The area of OTHG is up to 16 mm2. Density functional theory calculations demonstrate that the OTHG has two deformed Dirac cones along one high‐symmetry direction and a finite energy gap along the other directions at the Fermi energy, indicating strong anisotropic electrical properties. An efficient method is thus provided to produce large‐scale crystalline functionalized graphene with specially desired properties. 相似文献
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Near‐Equilibrium Chemical Vapor Deposition of High‐Quality Single‐Crystal Graphene Directly on Various Dielectric Substrates 下载免费PDF全文
Jianyi Chen Yunlong Guo Lili Jiang Zhiping Xu Liping Huang Yunzhou Xue Dechao Geng Bin Wu Wenping Hu Gui Yu Yunqi Liu 《Advanced materials (Deerfield Beach, Fla.)》2014,26(9):1348-1353
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Graphene: Near‐Equilibrium Chemical Vapor Deposition of High‐Quality Single‐Crystal Graphene Directly on Various Dielectric Substrates (Adv. Mater. 9/2014) 下载免费PDF全文
Jianyi Chen Yunlong Guo Lili Jiang Zhiping Xu Liping Huang Yunzhou Xue Dechao Geng Bin Wu Wenping Hu Gui Yu Yunqi Liu 《Advanced materials (Deerfield Beach, Fla.)》2014,26(9):1471-1471
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Xuefu Zhang Tianru Wu Qi Jiang Huishan Wang Hailong Zhu Zhiying Chen Ren Jiang Tianchao Niu Zhuojun Li Youwei Zhang Zhijun Qiu Guanghui Yu Ang Li Shan Qiao Haomin Wang Qingkai Yu Xiaoming Xie 《Small (Weinheim an der Bergstrasse, Germany)》2019,15(22)
The future electronic application of graphene highly relies on the production of large‐area high‐quality single‐crystal graphene. However, the growth of single‐crystal graphene on different substrates via either single nucleation or seamless stitching is carried out at a temperature of 1000 °C or higher. The usage of this high temperature generates a variety of problems, including complexity of operation, higher contamination, metal evaporation, and wrinkles owing to the mismatch of thermal expansion coefficients between the substrate and graphene. Here, a new approach for the fabrication of ultraflat single‐crystal graphene using Cu/Ni (111)/sapphire wafers at lower temperature is reported. It is found that the temperature of epitaxial growth of graphene using Cu/Ni (111) can be reduced to 750 °C, much lower than that of earlier reports on catalytic surfaces. Devices made of graphene grown at 750 °C have a carrier mobility up to ≈9700 cm2 V?1 s?1 at room temperature. This work shines light on a way toward a much lower temperature growth of high‐quality graphene in single crystallinity, which could benefit future electronic applications. 相似文献
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Surface Monocrystallization of Copper Foil for Fast Growth of Large Single‐Crystal Graphene under Free Molecular Flow 下载免费PDF全文
Huan Wang Xiaozhi Xu Jiayu Li Li Lin Luzhao Sun Xiao Sun Shuli Zhao Congwei Tan Cheng Chen Wenhui Dang Huaying Ren Jincan Zhang Bing Deng Ai Leen Koh Lei Liao Ning Kang Yulin Chen Hongqi Xu Feng Ding Kaihui Liu Hailin Peng Zhongfan Liu 《Advanced materials (Deerfield Beach, Fla.)》2016,28(40):8968-8974
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Self‐Assembly of Thiourea‐Crosslinked Graphene Oxide Framework Membranes toward Separation of Small Molecules 下载免费PDF全文
Jingjing Yang Dian Gong Guihua Li Gaofeng Zeng Qiyan Wang Yelei Zhang Guojuan Liu Ping Wu Evgeny Vovk Zheng Peng Xiaohong Zhou Yong Yang Zhi Liu Yuhan Sun 《Advanced materials (Deerfield Beach, Fla.)》2018,30(16)
The poor mechanical strength of graphene oxide (GO) membranes, caused by the weak interlamellar interactions, poses a critical challenge for any practical application. In addition, intrinsic but large‐sized 2D channels of stacked GO membranes lead to low selectivity for small molecules. To address the mechanical strength and 2D channel size control, thiourea covalent‐linked graphene oxide framework (TU‐GOF) membranes on porous ceramics are developed through a facile hydrothermal self‐assembly synthesis. With this strategy, thiourea‐bridged GO laminates periodically through the dehydration condensation reactions via ? NH2 and/or ? SH with ? O?C? OH as well as the nucleophilic addition reactions of ? NH2 to C? O? C, leading to narrowed and structurally well‐defined 2D channels due to the small dimension of the covalent TU‐link and the deoxygenated processes. The resultant TU‐GOF/ceramic composite membranes feature excellent sieving capabilities for small species, leading to high hydrogen permselectivities and nearly complete rejections for methanol and small ions in gas, solvent, and saline water separations. Moreover, the covalent bonding formed at the GO/support and GO/GO interfaces endows the composite membrane with significantly enhanced stability. 相似文献
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Clean Transfer of Large Graphene Single Crystals for High‐Intactness Suspended Membranes and Liquid Cells 下载免费PDF全文
Jincan Zhang Li Lin Luzhao Sun Yucheng Huang Ai Leen Koh Wenhui Dang Jianbo Yin Mingzhan Wang Congwei Tan Tianran Li Zhenjun Tan Zhongfan Liu Hailin Peng 《Advanced materials (Deerfield Beach, Fla.)》2017,29(26)
The atomically thin 2D nature of suspended graphene membranes holds promising in numerous technological applications. In particular, the outstanding transparency to electron beam endows graphene membranes great potential as a candidate for specimen support of transmission electron microscopy (TEM). However, major hurdles remain to be addressed to acquire an ultraclean, high‐intactness, and defect‐free suspended graphene membrane. Here, a polymer‐free clean transfer of sub‐centimeter‐sized graphene single crystals onto TEM grids to fabricate large‐area and high‐quality suspended graphene membranes has been achieved. Through the control of interfacial force during the transfer, the intactness of large‐area graphene membranes can be as high as 95%, prominently larger than reported values in previous works. Graphene liquid cells are readily prepared by π–π stacking two clean single‐crystal graphene TEM grids, in which atomic‐scale resolution imaging and temporal evolution of colloid Au nanoparticles are recorded. This facile and scalable production of clean and high‐quality suspended graphene membrane is promising toward their wide applications for electron and optical microscopy. 相似文献
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