Ion emission from solid electrolyte CsAg4Br2.68I2.32 film deposited on Ag-tip: Characteristics and applications

Autor: Zhenguo Wang, Xiaomei Zeng, Dmitriy V. Suvorov, Gennady P. Gololobov, A. E. Ieshkin, Vasiliy O. Pelenovich, Dejun Fu, Wenbin Zuo, Alexander Tolstogouzov, Donghong Hu, Chuansheng Liu
Rok vydání: 2019
Předmět:
Zdroj: Vacuum. 167:382-388
ISSN: 0042-207X
DOI: 10.1016/j.vacuum.2019.06.041
Popis: 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.
Databáze: OpenAIRE
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