Evolvement Investigation of Secondary Electron Emission for Ultrathin MgO Coatings Prepared by Atomic Layer Deposition | |
Zhu, Xiangping5,6; Guo, Junjiang4; Li, Xiangxin3; Zhou, Rundong5,6; Wang, Dan1,2; Zhao, Wei6 | |
刊名 | APPLIED SCIENCES-BASEL |
2021-06 | |
卷号 | 11期号:11 |
关键词 | secondary electron emission magnesium oxide double-layer structure |
ISSN号 | 2076-3417 |
DOI | 10.3390/app11114801 |
产权排序 | 1 |
英文摘要 | MgO is a kind of high secondary electron yield (SEY) material with important applications in electron multipliers. MgO coatings can be used as the electron emission layer for multiplier dynode to improve the electron gain significantly. However, the SEY investigation on ultrathin MgO coatings is not complete and needed to be supplemented urgently. In this work, a series of MgO coatings with increasing thickness were prepared by atomic layer deposition. SEY properties and energy spectra were characterized, and the effect of coating thickness on SEY was systematically analyzed. Experimental results show that SEY of MgO/Si samples rises as the coating thickness increases. Merely, SEY almost does not change with the coating thickness when the thickness exceeds 30 nm. Then, a SEY semi-empirical theory was employed to interpret the SEY regularities of MgO coatings by regarding the coating samples as ideal double-layer structures. Theoretical calculation quantitatively explained the SEY variation observed during the experiments, and further quantified the SEY contribution level of top coating and bottom substrate for the 1 nm and 20 nm MgO coatings. The work is of great significance for comprehending the SEY of ultrathin MgO coatings and expanding the applications of nanoscale coatings with high SEY. |
语种 | 英语 |
出版者 | MDPI |
WOS记录号 | WOS:000659616000001 |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/94892] |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
通讯作者 | Wang, Dan |
作者单位 | 1.Xi An Jiao Tong Univ, Sch Microelect, Xian 710049, Peoples R China 2.Xi An Jiao Tong Univ, Sch Informat & Commun Engn, Xian 710049, Peoples R China 3.ZhongKe Atom Precise Mfg Technol Co Ltd, Xian 710119, Peoples R China 4.Dept Sci & Technol Guangxi Zhuang Autonomous Reg, Nanning 530012, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China |
推荐引用方式 GB/T 7714 | Zhu, Xiangping,Guo, Junjiang,Li, Xiangxin,et al. Evolvement Investigation of Secondary Electron Emission for Ultrathin MgO Coatings Prepared by Atomic Layer Deposition[J]. APPLIED SCIENCES-BASEL,2021,11(11). |
APA | Zhu, Xiangping,Guo, Junjiang,Li, Xiangxin,Zhou, Rundong,Wang, Dan,&Zhao, Wei.(2021).Evolvement Investigation of Secondary Electron Emission for Ultrathin MgO Coatings Prepared by Atomic Layer Deposition.APPLIED SCIENCES-BASEL,11(11). |
MLA | Zhu, Xiangping,et al."Evolvement Investigation of Secondary Electron Emission for Ultrathin MgO Coatings Prepared by Atomic Layer Deposition".APPLIED SCIENCES-BASEL 11.11(2021). |
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