研究目的
To directly correlate the distinct electronic properties with its atomic structure from an individual carbon nanotube.
研究成果
The core-loss spectra has a much higher special resolution and reflects more localized electronic structures. Such a highly localized measurement of electronic properties for individual carbon nanotubes has never been realized by any other methods.
研究不足
The large delocalization in the valence-loss spectra makes it difficult to distinguish the two closely aligned SWNTs.
1：Experimental Design and Method Selection:
Transmission electron microscopy (TEM) consisting of a monochromator was used to demonstrate highly localized electronic properties of individual carbon nanotubes with precise atomic structures.
2：Sample Selection and Data Sources:
Individual freestanding SWNTs were used.
3：List of Experimental Equipment and Materials:
JEOL TEM (TripleC#2) equipped with a Schottky field emission gun, a double Wien filter monochromator and delta correctors.
4：Experimental Procedures and Operational Workflow:
Electron energy loss spectroscopy (EELS) was performed on individual freestanding SWNTs with the scanning TEM (STEM) mode at 60 kV. The target SWNTs were also imaged by both STEM/TEM modes to fully assign their atomic structures.
5：Data Analysis Methods:
The line shape analysis was used to analyze the π* response of the SWNTs.
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