X射线光电子能谱
放气
聚乙烯
三聚体
材料科学
分析化学(期刊)
结合能
聚合物
聚对苯二甲酸乙二醇酯
午睡
环境压力
化学
核磁共振
有机化学
复合材料
原子物理学
物理
热力学
生物
神经科学
二聚体
作者
Tahereh G. Avval,Grant T. Hodges,Joshua J. Wheeler,Daniel H. Ess,Stephan Bahr,Paul Dietrich,Michael Meyer,Andreas Thißen,Matthew R. Linford
摘要
Near-ambient pressure x-ray photoelectron spectroscopy (NAP-XPS) is a less traditional form of XPS that allows samples to be analyzed at relatively high pressures, i.e., at greater than 2500 Pa. With NAP-XPS, XPS can probe moderately volatile liquids, biological samples, porous materials, and/or polymeric materials that outgas significantly. In this submission, we show survey, C 1s, and O 1s NAP-XPS spectra of polyethylene terephthalate, a common, widely used thermoplastic. The C 1s envelope was fit with different approaches, i.e., to three, four, and five Gaussian–Lorentzian sum (GLS) functions. Hartree–Fock orbital energy calculations of a model trimer served as a guide to an additional fit of the C 1s envelope. The best fit was obtained by adding an extra component to the four-component fit to compensate for adventitious carbon or additives in the polymer. The O 1s signal was well fit with two GLS peaks with a 1:1 area ratio representing the C—O and C=O moieties in PET.
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