Electron-induced secondary electron emission of Zn-doped MgO/Au composite film

Jie Li; Wenbo Hu; Ling Hao; Buyu Gao; Shengli Wu; Jintao Zhang; Yongdong Li; Huiqing Fan

doi:10.1016/j.matlet.2018.07.058

Electron-induced secondary electron emission of Zn-doped MgO/Au composite film

Jie Li, Wenbo Hu, Ling Hao, Buyu Gao, Shengli Wu, Jintao Zhang, Yongdong Li, Huiqing Fan

School of Materials Sience and Engineering

Xi'an Jiaotong University

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

An MgO/Au composite film with a 1.8 at% Zn-doped MgO surface layer prepared by reactive magnetron sputtering exhibited a superior electron-induced secondary electron emission (SEE) performance, and it had a SEE coefficient of 5.4 with an increase of 9.3% and a similar SEE degradation rate in comparison with an undoped composite film under primary electron bombardment of 200 eV. The mechanism for this SEE coefficient increase is tightly related to the reduced work function of Zn-doped MgO crystal analyzed by first-principles calculations and the enlarged MgO grains as well as the decreased surface roughness of Zn-doped MgO/Au film observed by morphological characterizations. In addition, for the Zn-doped MgO/Au film its improved electrical conductivity induced by Zn doping results in a similar SEE degradation rate even though it emits secondary electrons with the higher coefficient all the time under continuous electron bombardment compared with the undoped film.

Original language	English
Pages (from-to)	360-363
Number of pages	4
Journal	Materials Letters
Volume	229
DOIs	https://doi.org/10.1016/j.matlet.2018.07.058
State	Published - 15 Oct 2018

Keywords

Electronic materials
MgO/Au composite film
Secondary electron emission
Sputtering
Zn-doped MgO

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10.1016/j.matlet.2018.07.058

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title = "Electron-induced secondary electron emission of Zn-doped MgO/Au composite film",

abstract = "An MgO/Au composite film with a 1.8 at% Zn-doped MgO surface layer prepared by reactive magnetron sputtering exhibited a superior electron-induced secondary electron emission (SEE) performance, and it had a SEE coefficient of 5.4 with an increase of 9.3% and a similar SEE degradation rate in comparison with an undoped composite film under primary electron bombardment of 200 eV. The mechanism for this SEE coefficient increase is tightly related to the reduced work function of Zn-doped MgO crystal analyzed by first-principles calculations and the enlarged MgO grains as well as the decreased surface roughness of Zn-doped MgO/Au film observed by morphological characterizations. In addition, for the Zn-doped MgO/Au film its improved electrical conductivity induced by Zn doping results in a similar SEE degradation rate even though it emits secondary electrons with the higher coefficient all the time under continuous electron bombardment compared with the undoped film.",

keywords = "Electronic materials, MgO/Au composite film, Secondary electron emission, Sputtering, Zn-doped MgO",

author = "Jie Li and Wenbo Hu and Ling Hao and Buyu Gao and Shengli Wu and Jintao Zhang and Yongdong Li and Huiqing Fan",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = oct,

day = "15",

doi = "10.1016/j.matlet.2018.07.058",

language = "英语",

volume = "229",

pages = "360--363",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Electron-induced secondary electron emission of Zn-doped MgO/Au composite film

AU - Li, Jie

AU - Hu, Wenbo

AU - Hao, Ling

AU - Gao, Buyu

AU - Wu, Shengli

AU - Zhang, Jintao

AU - Li, Yongdong

AU - Fan, Huiqing

PY - 2018/10/15

Y1 - 2018/10/15

N2 - An MgO/Au composite film with a 1.8 at% Zn-doped MgO surface layer prepared by reactive magnetron sputtering exhibited a superior electron-induced secondary electron emission (SEE) performance, and it had a SEE coefficient of 5.4 with an increase of 9.3% and a similar SEE degradation rate in comparison with an undoped composite film under primary electron bombardment of 200 eV. The mechanism for this SEE coefficient increase is tightly related to the reduced work function of Zn-doped MgO crystal analyzed by first-principles calculations and the enlarged MgO grains as well as the decreased surface roughness of Zn-doped MgO/Au film observed by morphological characterizations. In addition, for the Zn-doped MgO/Au film its improved electrical conductivity induced by Zn doping results in a similar SEE degradation rate even though it emits secondary electrons with the higher coefficient all the time under continuous electron bombardment compared with the undoped film.

AB - An MgO/Au composite film with a 1.8 at% Zn-doped MgO surface layer prepared by reactive magnetron sputtering exhibited a superior electron-induced secondary electron emission (SEE) performance, and it had a SEE coefficient of 5.4 with an increase of 9.3% and a similar SEE degradation rate in comparison with an undoped composite film under primary electron bombardment of 200 eV. The mechanism for this SEE coefficient increase is tightly related to the reduced work function of Zn-doped MgO crystal analyzed by first-principles calculations and the enlarged MgO grains as well as the decreased surface roughness of Zn-doped MgO/Au film observed by morphological characterizations. In addition, for the Zn-doped MgO/Au film its improved electrical conductivity induced by Zn doping results in a similar SEE degradation rate even though it emits secondary electrons with the higher coefficient all the time under continuous electron bombardment compared with the undoped film.

KW - Electronic materials

KW - MgO/Au composite film

KW - Secondary electron emission

KW - Sputtering

KW - Zn-doped MgO

UR - http://www.scopus.com/inward/record.url?scp=85049968982&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2018.07.058

DO - 10.1016/j.matlet.2018.07.058

M3 - 文章

AN - SCOPUS:85049968982

SN - 0167-577X

VL - 229

SP - 360

EP - 363

JO - Materials Letters

JF - Materials Letters

ER -

Electron-induced secondary electron emission of Zn-doped MgO/Au composite film

Abstract

Keywords

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