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

Zhenbao Feng; Hefu Li; Zongliang Wang; Xiaoyan Zhang; Hengshuai Li; Haiquan Hu; Dangsheng Su

doi:10.1017/S1431927619014879

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

Microsc Microanal. 2019 Oct;25(5):1155-1159. doi: 10.1017/S1431927619014879.

Authors

Zhenbao Feng¹, Hefu Li¹, Zongliang Wang¹, Xiaoyan Zhang¹, Hengshuai Li², Haiquan Hu¹, Dangsheng Su³

Affiliations

¹ School of Physics Science and Information Technology, Shandong Key Laboratory of Optical Communication Science and Technology, Liaocheng University, Liaocheng 252059, China.
² School of Mechanical and Automotive Engineering, Liaocheng University, Liaocheng 252059, China.
³ Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.

PMID: 31481138
DOI: 10.1017/S1431927619014879

Abstract

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.

Keywords: Compton profile; carbon nanotubes; electron energy-loss spectroscopy; electron momentum density.

Publication types

Research Support, Non-U.S. Gov't