A Study of Solid CO2/H2O and CO2/CH3OH by XPS
作者:
T. R. Dillingham,
D. M. Cornelison,
期刊:
Surface Science Spectra
(AIP Available online 1999)
卷期:
Volume 6,
issue 2
页码: 146-152
ISSN:1055-5269
年代: 1999
DOI:10.1116/1.1247916
出版商: American Vacuum Society
关键词: carbon dioxide;water;methanol;ice;XPS
数据来源: AIP
摘要:
High quality solid CO2/H2O and CO2/CH3OH films have been grown on a stainless steel cold-finger using a continuous flow liquid nitrogen system. The solid (or ice) was formed from research grade (99.995% min. purity) isotopic13CO2gas, and ultrapure water vapor or methanol vapor. The isotopic13CO2gas was used to distinguish it from any background CO2gas in the vacuum system. The gases were mixed in a stainless steel prechamber with the pressure monitored using an MKS capacitance manometer. The base pressure in the analysis chamber was less than 5 × 10−10T prior to deposition and upon gas introduction was inceased, using a precision leak valve, to approximately 2 × 10−8T. Films were grown at this pressure for approximately 1 h. Gas purity was monitored using a Balzers Prisma QMS 300 quadrupole mass spectrometer. The nucleated films were characterized using x-ray photoelectron spectroscopy (XPS). The reported spectra include survey and high resolution scans of the major photoelectron peaks.
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