Optimization of Monochromated TEM for Ultimate Resolution Imaging and Ultrahigh Resolution Electron Energy Loss Spectroscopy

Sergei Lopatin, Bin Cheng, Wei-Ting Liu, Meng-Lin Tsai, Jr-Hau He, Andrey Chuvilin

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The performance of a monochromated transmission electron microscope with Wien type monochromator is optimized to achieve an extremely narrow energy spread of electron beam and an ultrahigh energy resolution with spectroscopy. The energy spread in the beam is improved by almost an order of magnitude as compared to specified values. The optimization involves both the monochromator and the electron energy loss detection system. We demonstrate boosted capability of optimized systems with respect to ultra-low loss EELS and sub-angstrom resolution imaging (in a combination with spherical aberration correction).
Original languageEnglish (US)
Pages (from-to)109-115
Number of pages7
JournalUltramicroscopy
Volume184
DOIs
StatePublished - Sep 1 2017

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