Q
Qingkai Yu
Researcher at Chinese Academy of Sciences
Publications - 42
Citations - 4176
Qingkai Yu is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Graphene & Chemical vapor deposition. The author has an hindex of 20, co-authored 38 publications receiving 3603 citations. Previous affiliations of Qingkai Yu include University of Science and Technology of China & Center for Excellence in Education.
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Journal ArticleDOI
Control and characterization of individual grains and grain boundaries in graphene grown by chemical vapour deposition
Qingkai Yu,Qingkai Yu,Luis A. Jauregui,Wei Wu,Robert Colby,Jifa Tian,Zhihua Su,Helin Cao,Zhihong Liu,Deepak Pandey,Dongguang Wei,Ting-Fung Chung,Peng Peng,Nathan P. Guisinger,Eric A. Stach,Eric A. Stach,Jiming Bao,Shin-Shem Pei,Yong P. Chen +18 more
TL;DR: It is shown that grain boundaries give a significant Raman 'D' peak, impede electrical transport, and induce prominent weak localization indicative of intervalley scattering in graphene, opening a route towards scalable fabrication of single-crystal graphene devices without grain boundaries.
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Efficient solar water-splitting using a nanocrystalline CoO photocatalyst
Longb Liao,Qiuhui Zhang,Zhihua Su,Zhongzheng Zhao,Yanan Wang,Yang Li,Xiaoxiang Lu,Dongguang Wei,Guoying Feng,Qingkai Yu,Xiaojun Cai,Jimin Zhao,Zhifeng Ren,Hui Fang,Francisco Robles-Hernandez,Steven Baldelli,Jiming Bao +16 more
TL;DR: It is shown that cobalt(II) oxide (CoO) nanoparticles can carry out overall water splitting with a solar-to-hydrogen efficiency of around 5% and that the high photocatalytic activity of the nanoparticles arises from a significant shift in the position of the band edge of the material.
Journal ArticleDOI
Fast growth of inch-sized single-crystalline graphene from a controlled single nucleus on Cu–Ni alloys
Tianru Wu,Xuefu Zhang,Qinghong Yuan,Jiachen Xue,Guangyuan Lu,Zhihong Liu,Wang Huishan,Haomin Wang,Feng Ding,Qingkai Yu,Xiaoming Xie,Xiaoming Xie,Mianheng Jiang,Mianheng Jiang +13 more
TL;DR: An efficient strategy for achieving large-area single-crystalline graphene by letting a single nucleus evolve into a monolayer at a fast rate is demonstrated by locally feeding carbon precursors to a desired position of a substrate composed of an optimized Cu-Ni alloy.
Journal ArticleDOI
Growth of single crystal graphene arrays by locally controlling nucleation on polycrystalline Cu using chemical vapor deposition.
TL;DR: It is critical to synthesize high-quality graphene on a large scale to envision graphene technology, and intense efforts have been made to develop methods for graphene synthesis, including reduction of graphene oxide, thermal decomposition of SiC, and others.
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Patterning Metallic Nanostructures by Ion-Beam-Induced Dewetting and Rayleigh Instability
TL;DR: In this article, a maskless method combining top-down and bottom-up patterning was proposed for the fabrication of ordered nanostructures with precisely controlled size, spacing, and location.