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Ion emission from solid electrolyte CsAg4Br2.68I2.32 film deposited on Ag-tip: Characteristics and applications
Vacuum ( IF 4 ) Pub Date : 2019-09-01 , DOI: 10.1016/j.vacuum.2019.06.041
Wenbin Zuo , Vasiliy O. Pelenovich , Alexander B. Tolstogouzov , Alexei E. Ieshkin , Xiaomei Zeng , Zhenguo Wang , Gennady Gololobov , Dmitriy Suvorov , Chuansheng Liu , Dejun Fu , Donghong Hu

Abstract We have developed a solid electrolyte ion source (SEIS) with CsAg4Br2.68I2.32 film deposited on a silver tip. In the paper, Ag+ ion emission was significantly enhanced and the ion current of 1.6 μA was obtained at 168 °C temperature and 20 kV accelerating voltage. I-T and I-U characteristics were well described by the field evaporation (FEV) model, and the surface potential barrier was estimated to be 0.19 eV. Experimental investigations of the Ag+ ion emission mechanisms revealed that the solid electrolyte film plays an important role of ion-transport system, and the emitted Ag+ ions were compensated by the ions diffusing from the silver reservoir (Ag-tip). The developed SEIS was exploited for the synthesis of Ag nanoparticles on Si surface. The average size of these nanoparticles was estimated 15.5 ± 0.3 nm, and the projected range Rp of the low-energy high-dose Ag+ ions implanted Si sample was found to be less than 5 nm using TOF-SIMS depth profiling. The future application of SEISs in ion propulsion systems of miniature spacecraft with limited on-board payloads was discussed, and the thrust was estimated within μN range.

中文翻译:

沉积在 Ag 尖端上的固体电解质 CsAg4Br2.68I2.32 膜的离子发射:特性和应用

摘要 我们开发了一种固体电解质离子源 (SEIS),其 CsAg4Br2.68I2.32 薄膜沉积在银尖端上。论文中,Ag+离子发射显着增强,在168℃温度和20kV加速电压下获得1.6μA的离子电流。场蒸发 (FEV) 模型很好地描述了 IT 和 IU 特性,估计表面势垒为 0.19 eV。Ag+ 离子发射机制的实验研究表明,固体电解质膜在离子传输系统中起着重要作用,发射的 Ag+ 离子被从银库(Ag-tip)扩散的离子补偿。开发的 SEIS 用于在 Si 表面合成 Ag 纳米粒子。这些纳米颗粒的平均尺寸估计为 15.5 ± 0.3 nm,并且使用 TOF-SIMS 深度分析发现低能量高剂量 Ag+ 离子注入 Si 样品的投影范围 Rp 小于 5 nm。讨论了 SEIS 未来在载载有限的微型航天器离子推进系统中的应用,推力估计在 μN 范围内。
更新日期:2019-09-01
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