Monochromator for a 200 kV Analytical Electron Microscope

Mukai, Masakazu; Inami, W; Omoto, Kazuya; Kaneyama, T.; Tomita, T.; Tsuno, K.; Terauchi, Masami; Tsuda, Kenji; Naruse, Mikio; Honda, T.; Tanaka, Michiyoshi

doi:10.1017/s1431927606064816

Cited by 13 publications

(6 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several different types of monochromators aiming to combine energy resolution of the order of 0.1 eV with small-probe capabilities have been built in the last decade (Terauchi et al 1999;Tiemeijer 1999;Batson et al 2000;Kahl & Rose 2000;Huber et al 2004 (based on the design of Rose 1990b); Mukai et al 2006). All these instruments share one important trait: they disperse the beam in energy when it is at a low voltage of the order of 1-5 keV, and then accelerate it to the final voltage.…”

Section: High-energy-resolution Electron Energy-loss Spectroscopymentioning

confidence: 99%

High-energy-resolution monochromator for aberration-corrected scanning transmission electron microscopy/electron energy-loss spectroscopy

Krivanek

Ursin

Bacon

et al. 2009

Phil. Trans. R. Soc. A.

144

116

View full text Add to dashboard Cite

An all-magnetic monochromator/spectrometer system for sub-30 meV energy-resolution electron energy-loss spectroscopy in the scanning transmission electron microscope is described. It will link the energy being selected by the monochromator to the energy being analysed by the spectrometer, without resorting to decelerating the electron beam. This will allow it to attain spectral energy stability comparable to systems using monochromators and spectrometers that are raised to near the high voltage of the instrument. It will also be able to correct the chromatic aberration of the probe-forming column. It should be able to provide variable energy resolution down to approximately 10 meV and spatial resolution less than 1 Å.

show abstract

Section: High-energy-resolution Electron Energy-loss Spectroscopymentioning

confidence: 99%

High-energy-resolution monochromator for aberration-corrected scanning transmission electron microscopy/electron energy-loss spectroscopy

Krivanek

Ursin

Bacon

et al. 2009

Phil. Trans. R. Soc. A.

144

116

View full text Add to dashboard Cite

show abstract

“…This poor S/N was due to the inability of the monochromator TEM to focus the incident electron beam on an isolated CNT. Recently, a monochromator TEM (Mukai et al, 2007; Sato et al, 2011) has realized an electron probe with 1–2 nm diameter on a specimen with an energy resolution better than 0.1 eV. By using this monochromator TEM, it is expected that an EELS spectrum of isolated CNTs with a high-energy resolution and a better S/N can be obtained.…”

Section: Introductionmentioning

confidence: 99%

High-Energy Resolution Electron Energy-Loss Spectroscopy Study of Interband Transitions Characteristic to Single-Walled Carbon Nanotubes

Sato¹,

Terauchi²

2014

Microsc Microanal

View full text Add to dashboard Cite

An electron energy-loss spectroscopic (EELS) study using a monochromator transmission electron microscope was conducted for investigating the dielectric response of isolated single-walled carbon nanotubes (SWCNTs) owing to interband transitions characteristic to chiral structures. Individual chiral structures of the SWCNTs were determined by electron diffraction patterns. EELS spectra obtained from isolated SWCNTs showed sharp peaks below π plasmon energy of 5 eV, which were attributed to the characteristic interband transitions of SWCNTs. In addition, unexpected shoulder structures were observed at the higher energy side of each sharp peak. Simulations of EELS spectra by using the continuum dielectric theory showed that an origin of the shoulder structures was because of the surface dipole mode along the circumference direction of the SWCNT. It was noticed that the electron excitation energies obtained by EELS were slightly higher than those of optical studies, which might be because of the inelastic scattering process with the momentum transfers. To interpret the discrepancy between the EELS and optical experiments, it is necessary to conduct more accurate simulation including the first principle calculation for the band structure of SWCNTs.

show abstract

“…EELS spectra (Al L 2,3 -edge) were obtained by using a high energy-resolution EELS transmission electron microscope with an electron probe of 1 nm in diameter [19]. This microscope was equipped with a two-stage Wien-filter as a monochromator and an -filter for analyser.…”

Section: Methodsmentioning

confidence: 99%

Characteristic chemical shift of quasicrystalline alloy Al₅₃Si₂₇Mn₂₀ studied by EELS and SXES

Koshiya

Terauchi

Tsai

2011

Philosophical Magazine

View full text Add to dashboard Cite

Chemical shifts of all constituent atoms for amorphous (Am), quasicrystalline (QC) and crystalline (Cryst) alloys of Al 53 Si 27 Mn 20 were investigated for the first time by high energy-resolution electron energy-loss spectroscopy (EELS) and soft-X-ray emission spectroscopy (SXES). Among Al L-shell excitation EELS spectra of Am, QC and Cryst alloys, only QC alloy showed an apparent chemical shift to the larger binding energy side by 0.4 eV. In Al-K and Si-K emission SXES spectra of these alloys, only QC alloy showed a chemical shift to the larger binding energy side by 4 eV for Al-K and 6 eV for Si-K . These chemical shift values are comparable to those of corresponding metal oxides. This indicates a smaller amount of valence charge at Al and Si atomic sites in QC alloy. On the other hand, Mn-L SXES spectra did not show any chemical shift. Therefore, the decreased charge from Al and Si sites should be distributed between atomic sites, indicating the presence of covalent bonding nature for QC ordered alloy.

show abstract

Monochromator for a 200 kV Analytical Electron Microscope

Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005

Cited by 13 publications

References 2 publications

High-energy-resolution monochromator for aberration-corrected scanning transmission electron microscopy/electron energy-loss spectroscopy

High-energy-resolution monochromator for aberration-corrected scanning transmission electron microscopy/electron energy-loss spectroscopy

High-Energy Resolution Electron Energy-Loss Spectroscopy Study of Interband Transitions Characteristic to Single-Walled Carbon Nanotubes

Characteristic chemical shift of quasicrystalline alloy Al₅₃Si₂₇Mn₂₀ studied by EELS and SXES

Contact Info

Product

Resources

About

Monochromator for a 200 kV Analytical Electron Microscope

Abstract: Extended abstract of a paper presented at Microscopy and Microanalysis 2006 in Chicago, Illinois, USA, July 30 – August 3, 2005

Cited by 13 publications

References 2 publications

High-energy-resolution monochromator for aberration-corrected scanning transmission electron microscopy/electron energy-loss spectroscopy

High-energy-resolution monochromator for aberration-corrected scanning transmission electron microscopy/electron energy-loss spectroscopy

High-Energy Resolution Electron Energy-Loss Spectroscopy Study of Interband Transitions Characteristic to Single-Walled Carbon Nanotubes

Characteristic chemical shift of quasicrystalline alloy Al53Si27Mn20 studied by EELS and SXES

Contact Info

Product

Resources

About

Characteristic chemical shift of quasicrystalline alloy Al₅₃Si₂₇Mn₂₀ studied by EELS and SXES