Investigation of Electron Momentum Density in Carbon Nanotubes Using Transmission Electron Microscopy

被引：5
|
作者：
Feng, Zhenbao [1 ]
Li, Hefu [1 ]
Wang, Zongliang [1 ]
Zhang, Xiaoyan [1 ]
Li, Hengshuai [2 ]
Hu, Haiquan [1 ]
Su, Dangsheng [3 ]
机构：
[1] Liaocheng Univ, Sch Phys Sci & Informat Technol, Shandong Key Lab Opt Commun Sci & Technol, Liaocheng 252059, Shandong, Peoples R China
[2] Liaocheng Univ, Sch Mech & Automot Engn, Liaocheng 252059, Shandong, Peoples R China
[3] Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
来源：
MICROSCOPY AND MICROANALYSIS | 2019年 / 25卷 / 05期
基金：
中国国家自然科学基金;
关键词：
carbon nanotubes; Compton profile; electron energy-loss spectroscopy; electron momentum density; COMPTON-SCATTERING; GRAPHITE; PROFILES; SOLIDS;
D O I：
10.1017/S1431927619014879
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Valence Compton profiles (CPs) of multiwall (MWCNTs) and single-wall carbon nanotubes (SWCNTs) were obtained by recording electron energy-loss spectra at large momentum transfer in the transmission electron microscope, a technique known as electron Compton scattering from solids (ECOSS). The experimental MWCNT/SWCNT results were compared with that of graphite. Differences between the valence CPs of MWCNTs and SWCNTs were observed, and the SWCNT CPs indicate a greater delocalization of the ground-state charge density compared to graphite. The results clearly demonstrate the feasibility and potential of the ECOSS technique as a complementary tool for studying the electronic structure of materials with nanoscale spatial resolution.
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页码：1155 / 1159
页数：5
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