Preparation of MgO/Au Multilayer Composite Films and Related Studies on Secondary Electron Emission Effect

Wei, Qiang; Wu, Shengli; Wei, Kongting; Li, Jie; Hu, Wenbo; Zhang, Jintao

doi:10.1007/s11664-017-5768-2

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…There is a sufficient number of works where enhancement of SEEC of the relatively thick (>10 nm) MgO films was observed due to lowering EA due to the surface embedded metal. So, composites such as MgO/Au and Au/MgO modified by Zn and Al, showed high SEE, but despite modifying MgO, the films remained to be unstable during functioning [17][18][19][20][21][22][23][24]. The ALD fabrication of the Al 2 O 3 /MgO and MgO/Nb/MgO laminated composites with encapsulated MgO and nanoscale Nb layers was of interest for coating due to enhancement of SEEC [25,26].…”

Section: General Trendsmentioning

confidence: 99%

Mixed Films Based on MgO for Secondary Electron Emission Application: General Trends and MOCVD Prospects

et al. 2021

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Doping process is widely used to improving emission performance of MgO films thicker than 10 nm via assisting the surface recharge and changing in electron structure. The present paper briefly reviews this strategy in a search for the new materials and structures being effective for secondary electron emission (SEE) and their diagnostics. Then, Metal-Organic Chemical Vapor Deposition (MOCVD) coupled with the specially selected precursor is suggested here as a new technique that transforms the refractory oxides to nanoscale, defect-disordered materials able to solid-solid interaction at 450 °C. Primary experiments have been performed for demanded mixed films based on MgO with ZrO2 and CeO2 additions. A dopant impact on facilitating the formation of oxygen vacancies in the host oxide and on the features of new mixed phases have been studied by new diagnostic means, based primarily on chemical method of differential dissolution. The method brought out the effective solvents that were the probes for identifying the nanoscale and amorphous phases possessing by the different defects on the surface of MgO films and determining contents of these phases. This approach allowed us to explain the origin of mixed phases and to estimate contribution of each from them in the macroscopic SEE properties.

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Section: General Trendsmentioning

confidence: 99%

Mixed Films Based on MgO for Secondary Electron Emission Application: General Trends and MOCVD Prospects

et al. 2021

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“…Magnesium oxide is a well-studied model system − for our purpose. It can be found in multilayer systems , and ultrathin layers , and it is used, for example, in (photo) catalysis , and as a protective layer for electrodes. , Additionally, (MgO) n cubes have been investigated by density functional theory (DFT) calculations and in molecular beam experiments. − …”

Section: Introductionmentioning

confidence: 99%

“…35 The crystals have a NaCl structure, that is, form a cubic system with the space group Fm3̅ m. 36 Magnesium oxide is a well-studied model system 37−40 for our purpose. It can be found in multilayer systems 41,42 and ultrathin layers 43,44 and it is used, for example, in (photo) catalysis 45,46 and as a protective layer for electrodes. 47,48 Additionally, (MgO…”

Section: ■ Introductionmentioning

confidence: 99%

Structures and Thermodynamics of MgO/SiO Interfaces

et al. 2019

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Silicon monoxide is a complex material which tends to form atomic and nanoscale amorphous structures. The question is in which ways can the stability of SiO on suitable carriers or interfaces be enhanced. This was investigated by statistical thermodynamics based on density functional theory calculations on SiO layers on and in-between MgO(100) model surfaces. Furthermore, the stability of ordered close-packed SiO layers and their relaxation into amorphous structures were studied. Some selected SiO structures between thin MgO sheets were investigated and their interface energies are discussed. The results for the interface tensions can be understood by a strong lateral repulsion between atoms in ordered close-packed SiO layers on MgO(100). The SiO layer can thereby induce stress on the MgO sheets.

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Surface characterization determined from the secondary electron emission coefficient upon ion bombardment

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Ballauf

et al. 2021

Applied Surface Science

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Preparation of MgO/Au Multilayer Composite Films and Related Studies on Secondary Electron Emission Effect

Cited by 6 publications

References 14 publications

Mixed Films Based on MgO for Secondary Electron Emission Application: General Trends and MOCVD Prospects

Mixed Films Based on MgO for Secondary Electron Emission Application: General Trends and MOCVD Prospects

Structures and Thermodynamics of MgO/SiO Interfaces

Surface characterization determined from the secondary electron emission coefficient upon ion bombardment

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