Directed gas phase formation of silicon dioxide and implications for the formation of interstellar silicates

Nature Communications
Tao YangTom J Millar

Abstract

Interstellar silicates play a key role in star formation and in the origin of solar systems, but their synthetic routes have remained largely elusive so far. Here we demonstrate in a combined crossed molecular beam and computational study that silicon dioxide (SiO2) along with silicon monoxide (SiO) can be synthesized via the reaction of the silylidyne radical (SiH) with molecular oxygen (O2) under single collision conditions. This mechanism may provide a low-temperature path-in addition to high-temperature routes to silicon oxides in circumstellar envelopes-possibly enabling the formation and growth of silicates in the interstellar medium necessary to offset the fast silicate destruction.

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Citations

Apr 18, 2020·Chemistry : a European Journal·Weiyu QianXiaoqing Zeng
Aug 30, 2020·Proceedings of the National Academy of Sciences of the United States of America·Srinivas DoddipatlaTom J Millar
Jan 16, 2020·Journal of the American Chemical Society·Changyun ChenXiaoqing Zeng

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