Single atom spectroscopy: Decreased scattering delocalization at high energy losses, effects of atomic movement and X-ray fluorescence yield

Luiz H.G. Tizei, Yoko Iizumi, Toshiya Okazaki, Ryo Nakanishi, Ryo Kitaura, Hisanori Shinohara, Kazu Suenaga

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Single atom localization and identification is crucial in understanding effects which depend on the specific local environment of atoms. In advanced nanometer scale materials, the characteristics of individual atoms may play an important role. Here, we describe spectroscopic experiments (electron energy loss spectroscopy, EELS, and Energy Dispersed X-ray spectroscopy, EDX) using a low voltage transmission electron microscope designed towards single atom analysis. For EELS, we discuss the advantages of using lower primary electron energy (30 keV and 60 keV) and higher energy losses (above 800 eV). The effect of atomic movement is considered. Finally, we discuss the possibility of using atomically resolved EELS and EDX data to measure the fluorescence yield for X-ray emission.

Original languageEnglish
Pages (from-to)239-246
Number of pages8
JournalUltramicroscopy
Volume160
DOIs
Publication statusPublished - 2016 Jan 1

Keywords

  • EDX
  • EELS
  • STEM
  • Single atoms

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Instrumentation

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