Advantages of soft X-ray absorption over TEM-EELS for solid carbon studies - a comparative study on diesel soot with EELS and NEXAFS

被引：136

作者：

Braun, A

Huggins, FE

Shah, N

Chen, Y

Wirick, S

Mun, SB

Jacobsen, C

Huffman, GP

机构：

[1] Univ Kentucky, Consortium Fossil Fuel Sci, Lexington, KY 40506 USA

[2] Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Upton, NY 11973 USA

[3] Ernest Orlando Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

CARBON | 2005年 / 43卷 / 01期

基金：

美国国家科学基金会;

关键词：

soot; combustion; electron energy loss spectroscopy; functional groups;

D O I：

10.1016/j.carbon.2004.08.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Diesel soot was investigated with electron energy loss spectroscopy (EELS) and near edge X-ray absorption fine structure spectroscopy (NEXAFS). The EELS spectra were obtained in connection with transmission electron microscopy studies, whereas the NEXAFS were obtained from a scanning transmission X-ray microscope (STXM) and from a conventional NEXAFS beamline at two synchrotron facilities. The X-ray absorption spectra show molecular species, aliphatics, such as carboxyl, and C-H bonds, which are not visible in EELS spectra of the same material. In particular, EELS fails to detect surface-functional groups, which can be detected with NEXAFS. Since numerous works on molecular carbon structure determined with TEM-EELS have been published, it is possible that these results have to be reassessed. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：117 / 124

页数：8

共 24 条

[1] Microstructural and electron spectroscopic characterization of carbon nanostructures and nanotubes produced using multimetal catalysts [J].