Origins of sp3C peaks in C1s X-ray Photoelectron Spectra of Carbon Materials

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• 作者：Ayaka Fujimoto ; Yasuhiro Yamada ; Michio Koinuma ; Satoshi Sato
• 刊名：Analytical Chemistry
• 出版年：2016
• 出版时间：June 21, 2016
• 年：2016
• 卷：88
• 期：12
• 页码：6110-6114
• 全文大小：375K
• 年卷期：0
• ISSN：1520-6882

文摘

X-ray photoelectron spectroscopy (XPS) is among the most powerful techniques to analyze defective structures of carbon materials such as graphene and activated carbon. However, reported assignments of defects, especially sp³C and sp²C, are questionable. Most reports assign sp³C peaks to be higher than sp²C peaks, whereas a few reports assign sp³C peaks to be lower than sp²C peaks. Our group previously reported that calculated binding energies of sp³C were basically lower than those of sp²C. This work clarified that one of the reasons for the prevailing ambiguous assignments of sp³C peaks is charging effects of diamond.