L
Lei Qian
Researcher at Shandong University
Publications - 79
Citations - 2443
Lei Qian is an academic researcher from Shandong University. The author has contributed to research in topics: Permittivity & Dielectric. The author has an hindex of 23, co-authored 62 publications receiving 1895 citations. Previous affiliations of Lei Qian include University of Liverpool.
Papers
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Journal ArticleDOI
Controlled freezing and freeze drying: a versatile route for porous and micro-/nano-structured materials
Lei Qian,Haifei Zhang +1 more
TL;DR: Freeze drying is a process whereby solutions are frozen in a cold bath and then the frozen solvents are removed via sublimation under vacuum, leading to formation of porous structures as mentioned in this paper.
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Random Composites of Nickel Networks Supported by Porous Alumina Toward Double Negative Materials
Zhicheng Shi,Runhua Fan,Zidong Zhang,Lei Qian,Meng Gao,Mo Zhang,Li-tuo Zheng,Xi-hua Zhang,Longwei Yin +8 more
TL;DR: The random composite for DNMs (RC-DNMs) can be prepared by typical processing of material, which makes it possible to explore new DNMs and potential applications, and to feasibly tune their electromagnetic parameters by controlling their composition and microstructure.
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Radio frequency negative permittivity in random carbon nanotubes/alumina nanocomposites
Chuanbing Cheng,Runhua Fan,Yanrong Ren,Tao Ding,Lei Qian,Jiang Guo,Li Xiaofeng,Liqiong An,Yanhua Lei,Yansheng Yin,Zhanhu Guo +10 more
TL;DR: This work is favorable to revealing the generation mechanism of negative permittivity behavior and will greatly facilitate the practical applications of metamaterials.
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Urchin-like NiO–NiCo2O4 heterostructure microsphere catalysts for enhanced rechargeable non-aqueous Li–O2 batteries
Wen Zhao,Xiaomin Li,Rui Yin,Lei Qian,Xiaoshuai Huang,Hu Liu,Hu Liu,Jiaoxia Zhang,Jiaoxia Zhang,Jun Wang,Tao Ding,Zhanhu Guo +11 more
TL;DR: NiO-NiCo2O4 microspheres with heterostructures are successfully synthesized through a facile hydrothermal method and the electrode can be continuously discharged and charged without obvious terminal voltage variation for 80 cycles, suggesting that NiO- NiCo 2O4 is a promising catalyst for Li-O2 batteries.
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Green synthesis of chitosan-based nanofibers and their applications
Lei Qian,Haifei Zhang +1 more
TL;DR: In this article, a simple and green method was proposed for the preparation of chitosan-based nanofibers by freeze-drying dilute aqueous solutions, without the use of organic solvent, high concentration of acid solutions, or the need to pre-treat chitosa.