Suppression of secondary electron emission of oxygen free copper by two-step electrodeposition of rGO/Cu composite coating

被引：3
作者：
Zhang, Haifeng [1 ]
Ge, Ying [1 ]
Lu, Yunkun [2 ]
Yan, Mengjie [1 ]
Zhang, Jingcen [1 ]
Fu, Hao [3 ]
Long, Haiming [1 ]
Li, Pei [1 ]
Li, Yang [1 ]
Zhang, Chenzeng [1 ]
Hao, Junjie [1 ,4 ]
机构：
[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[2] China Gen Nucl Powder New Energy Holdings Co Ltd, Sci & Technol Innovat Ctr, Beijing 100160, Peoples R China
[3] China Elect Technol Grp Corp, Res Inst 12, Beijing 100015, Peoples R China
[4] Beijing Inst Smart Energy, Beijing 102211, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2023年 / 611卷
关键词：
Graphene oxide; Secondary electron yield; Electric vacuum; Electro-deposition; MECHANICAL-PROPERTIES; GRAPHENE OXIDE; ELECTROPHORETIC DEPOSITION; RAMAN-SPECTROSCOPY; GRAPHITE; BOMBARDMENT;
D O I：
10.1016/j.apsusc.2022.155789
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We prepared a reduced-graphene-oxide/Cu (rGO/Cu) composite coating to suppress the total secondary electron yield by two-step electrodeposition. We found that driven by the applied electric field, copper ions can enter the interior of graphene oxide (GO) film and nucleate, while the surface is still GO. The rGO/Cu composite coating was obtained by heat treatment with a combination of hydrogen and argon. After heat treatment, XPS analysis shows that the oxygen content of rGO on the surface of the composite coating is reduced from 31.29 at.% to 11.00 at.%, and the carbon content is 85.25 at.%. Raman analysis shows that rGO is still mainly sp2 hybrid structure. The deposited copper particles sintered in the composite coating and formed Cu-O-C chemical bond. The maximum secondary electron yield (delta(max)) is 1.10, which is close to the delta(max) of rGO coating (1.09). Compared with the rGO coating, the presence of copper in the rGO/Cu composite coating slightly increases the TEY, but significantly improves the bonding strength between the coating and the substrate at high temperatures.
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页数：11
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