Energy resolution of an Omega-type monochromator and imaging properties of the MANDOLINE filter

Essers, Erik; Benner, G.; Mandler, T; Meyer, Stefan P.; Mittmann, Dieter; Schnell, M.; Höschen, R.

doi:10.1016/j.ultramic.2010.02.009

Cited by 53 publications

(28 citation statements)

References 14 publications

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“…It is also possible to switch the monochromator off and operate the microscope with a straight-through beam, as in ordinary operation mode. To take advantage of the reduced energy spread of the monochromator, the microscope also incorporates an in-column energy-loss filter, termed the Omega filter due to its distinct shape (Essers et al, 2010). …”

Section: Methodsmentioning

confidence: 99%

Sub-Ångstrom Low-Voltage Performance of a Monochromated, Aberration-Corrected Transmission Electron Microscope

2010

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Lowering the electron energy in the transmission electron microscope allows for a significant improvement in contrast of light elements, and reduces knock-on damage for most materials. If low-voltage electron microscopes are defined as those with accelerating voltages below 100 kV, the introduction of aberration correctors and monochromators to the electron microscope column enables Ångstrom-level resolution, which was previously reserved for higher voltage instruments. Decreasing electron energy has three important advantages: 1) knock-on damage is lower, which is critically important for sensitive materials such as graphene and carbon nanotubes; 2) cross sections for electron-energy-loss spectroscopy increase, improving signal-to-noise for chemical analysis; 3) elastic scattering cross sections increase, improving contrast in high-resolution, zero-loss images. The results presented indicate that decreasing the acceleration voltage from 200 kV to 80 kV in a monochromated, aberration-corrected microscope enhances the contrast while retaining sub-angstrom resolution. These improvements in low-voltage performance are expected to produce many new results and enable a wealth of new experiments in materials science.

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Section: Methodsmentioning

confidence: 99%

Sub-Ångstrom Low-Voltage Performance of a Monochromated, Aberration-Corrected Transmission Electron Microscope

2010

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“…This microscope incorporates the MANDOLINE filter [25,26], which creates a highly dispersive spectrum of energy losses suffered by the electrons when passing the specimen. Using a mechanical slit, a narrow energy range (0.2 eV) was selected and, using only these inelastically scattered electrons, an image is formed on a CCD detector.…”

Section: Transmission Electron Microscopymentioning

confidence: 99%

EFTEM study of surface plasmon resonances in silver nanoholes

et al. 2010

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“…MCs with Ω-shaped four toroidal deflectors have been proposed, evaluated and applied to TEM [15][16][17]. This symmetric optical configuration can cancel not only the energy dispersion but also all second-order geometric aberrations at the exit plane of the MCs.…”

Section: Introductionmentioning

confidence: 99%