Observation of MWCNTs with low-energy electron point source microscope

Yu Jie
Bai Xin
Zhang Zhao-Xiang
Zhang Geng-Min
Guo Deng-Zhu
Xue Zeng-Quan

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Publication date

January 2006

DOI

10.1088/1009-1963/15/7/030

Publisher

中国物理英文版

ISSN

1009-1963

Journal

1009-1963

Citation count (estimate)

Abstract

The low-energy electron point source (LEEPS) microscope, which creates enlarged projection images with low-energy field emission electron beams, can be used to observe the projection image of nano-scale samples and to characterize the coherence of the field emission beam. In this paper we report the design and test operation performance of a home-made LEEPS microscope. Multi-walled carbon nanotubes (MWCNTs) synthesized by the CVD method were observed by LEEPS microscope using a conventional tungsten tip, and projection images with the magnification of up to 10(4) was obtained. The resolution of the acquired images is similar to 10 nm. A higher resolution and a larger magnification can be expected when the AC magnetic field inside the equipm...