Laboratory Astrophysics Group of the Max Planck Institute for Astronomy at the Friedrich Schiller University Jena, Institute of Solid State Physics, Helmholtzweg 3, D-07743 Jena, Germany.
J Phys Chem A. 2010 Dec 23;114(50):13045-9. doi: 10.1021/jp110323n. Epub 2010 Nov 19.
The reaction between Si and O(2) was studied in liquid He droplets at low temperature (T = 0.37 K) by monitoring the energy release during the reaction. Additionally, the reactions of Si atoms and clusters with the oxidation agents H(2)O and O(2) have been studied by mass spectrometry. It was found that Si atoms react fast with O(2) molecules. On the other hand, Si atoms and clusters do not react with H(2)O molecules. The energy released during the chemical reaction leads to the ejection of the products from small He droplets. In contrast, large He droplets (N(He) > 20000) are capable of keeping part of the reaction products in their interior. The observation of SiO(2) products with the mass spectrometer reveals that the He droplet can stabilize intermediate products in the exit channel.
通过监测反应过程中的能量释放，研究了 Si 和 O(2) 在低温（T=0.37 K）下的液氦液滴中的反应。此外，还通过质谱法研究了 Si 原子和团簇与氧化剂 H(2)O 和 O(2) 的反应。结果发现，Si 原子与 O(2)分子反应迅速。另一方面，Si 原子和团簇与 H(2)O 分子不反应。化学反应过程中释放的能量导致产物从小的氦液滴中喷射出来。相比之下，大的氦液滴（N(He) > 20000）能够将部分反应产物保留在内部。质谱仪观察到的 SiO(2)产物表明，氦液滴可以在出口通道中稳定中间产物。
