Revealing distortion of carbon nanotube walls via angle-resolved X-ray spectroscopy
Current Applied Physics(2015)
摘要
Arrays of aligned single-walled carbon nanotubes (SWCNTs) produced by supergrowth method were studied by scanning electron microscopy (SEM) and angle-resolved near-edge X-ray absorption fine structure spectroscopy, which defined that nanotube disorder is 10–13° and 23–27°, respectively. The latter value was confirmed by X-ray fluorescent spectroscopy. The difference in the obtained angular deviations was attributed to distortion of the SWCNT walls, because the X-ray spectroscopy methods are sensitive to a local environment of probing atoms, while the SEM examines the nanotubes at a substantially larger length scale. Significant distortion (20–24°) of SWCNT walls could be related to the defects introduced during the growth process.
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关键词
Single-walled carbon nanotubes,Angle-resolved NEXAFS,X-ray fluorescent spectroscopy,Wall distortion
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