Electrical and mechanical properties of poly(dopamine)-modified copper/reduced graphene oxide composites | |
Department | 固体润滑国家重点实验室 |
Jia, Zhengfeng1,2,3; Li, Haoqi2; Zhao, Yao2; Laszlo Frazer4; Qian, Bosen2; Eric Borguet4; Ren, Fei2; Dmitriy A. Dikin2 | |
2017 | |
Source Publication | Journal of Materials Science |
ISSN | 0022-2461 |
Volume | 52Issue:19Pages:11620-11629 |
Abstract | Surface oxidation is frequently encountered in powder metallurgy of metals and alloys, and it leads to a reduction in their electrical conductivities. Therefore, it is highly desired to remove the naturally occurring oxide layer from the particles surface and to prevent its subsequent formation. A new approach was proposed in this study, where copper particles were mixed with graphene oxide (GO) sheets in an aqueous solution containing dopamine (DA) molecules. It was expected that polymerization of the DA molecules on the surface of the copper particle could promote both a reduction of surface oxide layer and the adhesion of GO sheets to the particles surface. The powder system was then washed, heat-treated in inert atmosphere and compressed at room temperature to form compacts. Electron microscopy revealed nearly ideal dispersion of GO sheets within the copper matrix. X-ray photoelectron spectroscopy showed a shift from Cu2+ to Cu+ and metallic copper in the coated and heat-treated samples, and Raman spectroscopy pointed to the increased amount of sp2 carbon as a result of the heat treatment. All DA/GO-coated and heat-treated compacts exhibited significantly higher electrical conductivity than those that have been made from pure copper powder or were not been heat-treated. Also, indentation measurements showed an increase in microhardness in samples with the shortest, 10 min, coating time and heat-treated at the highest, 600 °C, temperature. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1007/s10853-017-1307-z |
Funding Organization | Project of Shandong Province Higher Educational Science and Technology Program of China (No. J15LA60);Open Project of State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, China (LSL-1504);the Temple University faculty startup fund;The SEM imaging was performed in the CoE-NIC facility at Temple University, which is based on DoD DURIP Award N0014-12-1-0777 from the Office of Naval Research and is sponsored by the College of Engineering;part of the Center for the Computational Design of Functional Layered Materials, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Basic Energy Sciences under Award#DE-SC0012575 |
Indexed By | SCI |
If | 2.599 |
Language | 英语 |
compositor | 第三作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22098 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Ren, Fei; Dmitriy A. Dikin |
Affiliation | 1.Liaocheng Univ, Coll Mat Sci & Engn, Liaocheng 252059, Peoples R China 2.Temple Univ, Dept Mech Engn, Philadelphia, PA 19122 USA 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 73000, Peoples R China 4.Temple Univ, Dept Chem, Philadelphia, PA 19122 USA |
Recommended Citation GB/T 7714 | Jia, Zhengfeng,Li, Haoqi,Zhao, Yao,et al. Electrical and mechanical properties of poly(dopamine)-modified copper/reduced graphene oxide composites[J]. Journal of Materials Science,2017,52(19):11620-11629. |
APA | Jia, Zhengfeng.,Li, Haoqi.,Zhao, Yao.,Laszlo Frazer.,Qian, Bosen.,...&Dmitriy A. Dikin.(2017).Electrical and mechanical properties of poly(dopamine)-modified copper/reduced graphene oxide composites.Journal of Materials Science,52(19),11620-11629. |
MLA | Jia, Zhengfeng,et al."Electrical and mechanical properties of poly(dopamine)-modified copper/reduced graphene oxide composites".Journal of Materials Science 52.19(2017):11620-11629. |
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