Q
Qiongyu Li
Researcher at Xiamen University
Publications - 15
Citations - 1087
Qiongyu Li is an academic researcher from Xiamen University. The author has contributed to research in topics: Graphene & Graphene nanoribbons. The author has an hindex of 9, co-authored 13 publications receiving 934 citations.
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Journal ArticleDOI
Millimeter-Size Single-Crystal Graphene by Suppressing Evaporative Loss of Cu During Low Pressure Chemical Vapor Deposition
Shanshan Chen,Hengxing Ji,Harry Chou,Qiongyu Li,Hongyang Li,Ji Won Suk,Richard D. Piner,Lei Liao,Weiwei Cai,Rodney S. Ruoff +9 more
TL;DR: Millimeter-size single-crystal monolayer graphene is synthesized on polycrystalline Cu foil by a method that involves suppressing loss by evaporation of the Cu at high temperature under low pressure, significantly diminishes the number of graphene domains.
Journal ArticleDOI
Growth of Adlayer Graphene on Cu Studied by Carbon Isotope Labeling
Qiongyu Li,Harry Chou,Jin-Hui Zhong,Junyang Liu,Andrei Dolocan,Junyan Zhang,Yinghui Zhou,Rodney S. Ruoff,Shanshan Chen,Weiwei Cai +9 more
TL;DR: Results suggest that adlayer growth proceeds by catalytic decomposition of methane trapped in a "nano-chemical vapor deposition" chamber between the first layer and the substrate, and submillimeter bilayer graphene was synthesized by applying a much lower growth rate.
Journal ArticleDOI
Quantitative correlation between defect density and heterogeneous electron transfer rate of single layer graphene
Jin-Hui Zhong,Jie Zhang,Xi Jin,Junyang Liu,Qiongyu Li,Mao-Hua Li,Weiwei Cai,De-Yin Wu,Dongping Zhan,Bin Ren +9 more
TL;DR: It is demonstrated that precise control of the density of vacancy defects, introduced by Ar(+) irradiation, can improve and finely tune the heterogeneous electron transfer (HET) rate of graphene.
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Thermal conductivity measurements of suspended graphene with and without wrinkles by micro-Raman mapping
Shanshan Chen,Shanshan Chen,Qiongyu Li,Qimin Zhang,Yan Qu,Hengxing Ji,Rodney S. Ruoff,Weiwei Cai +7 more
TL;DR: The results suggest that the variation in published thermal conductivity values for suspended graphene samples could, at least in part, be due to the presence or absence of wrinkles.
Journal ArticleDOI
Study on the Diffusion Mechanism of Graphene Grown on Copper Pockets
Zhijuan Zhao,Zhifa Shan,Cankun Zhang,Qiongyu Li,Bo Tian,Zhiyi Huang,Weiyi Lin,Xiangping Chen,Hengxing Ji,Weifeng Zhang,Weiwei Cai +10 more
TL;DR: A correlation between graphene domains grown on the outer and the inner surfaces of Cu pockets is found, which discloses a new graphene growth mechanism based on the fast diffusion of carbon atoms through the 25 micro-meter-thick Cu foil.