Molecular Dynamics Simulations of Dielectric Breakdown of Lunar Regolith: Implications for Water Ice Formation on Lunar Surface

被引：9

作者：

Huang, Ziyu ^{[1
]}

Nomura, Ken-ichi ^{[2
]}

Nakano, Aiichiro ^{[3
]}

Wang, Joseph ^{[1
]}

机构：

[1] Univ Southern Calif, Dept Astronaut Engn, Los Angeles, CA 90007 USA

[2] Univ Southern Calif, Dept Chem Engn & Mat Sci, Los Angeles, CA USA

[3] Univ Southern Calif, Dept Comp Sci, Los Angeles, CA USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2021年 / 48卷 / 03期

关键词：

deep dielectric charging; dielectric breakdown; lunar regolith; molecular dynamics simulations; water formation; space weather; SOLAR-WIND IMPLANTATION; OH/H2O; MOON; RETENTION;

D O I：

10.1029/2020GL091681

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Molecular dynamics simulations are carried out to investigate dielectric breakdown of lunar regolith induced by space weather events and its potential effects on water ice formation on lunar surface. We find that dielectric breakdown can trigger the water formation process by breaking the chemical bonds of regolith grains and exposing the oxygen atoms to react with the hydrogen implanted by solar wind. In the permanently shadowed region, the water molecules formed become attached to regolith grains in the molecular structure of ice after the event. Thus, dielectric breakdown can also enable the preservation of water molecules by changing the hydrophobicity of regolith grains.

引用

页数：8

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