SCANNING TRANSMISSION ELECTRON MICROSCOPES
The 200kV Zeiss monochromated LIBRA 200MC is designed to produce high contrast imaging for TEM and STEM and either convergent beam or parallel beam diffraction using Koehler illumination.In addition, the incorporation of a monochromator into the field emission gun enables energy resolution of ~0.15eV for electron energy loss spectroscopy. The dedicated in-column Omega Filter implemented in this microscope also can be used for both spectroscopic analysis and energy-filtered imaging with a 2048x2048 CCD camera. The high tilt capability of the stage and pole piece accepts various types of analytical holders.This microscope is optimized for soft materials applications that require either the high contrast imaging performance or analytical methods such as EF-TEM and STEM.( Instrument Schedule & Requirements: 12-9am, 9-6pm, 6-12am; 1 session at a time during normal weekday business hours.)
The 200kV Zeiss monochromated LIBRA 200MC is designed to produce high contrast imaging for TEM and STEM and either convergent beam or parallel beam diffraction using Koehler illumination.In addition, the incorporation of a monochromator into the field emission gun enables energy resolution of ~0.15eV for electron energy loss spectroscopy. The dedicated in-column Omega Filter implemented in this microscope also can be used for both spectroscopic analysis and energy-filtered imaging with a 2048x2048 CCD camera. The high tilt capability of the stage and pole piece accepts various types of analytical holders.This microscope is optimized for soft materials applications that require either the high contrast imaging performance or analytical methods such as EF-TEM and STEM.( Instrument Schedule & Requirements: 12-9am, 9-6pm, 6-12am; 1 session at a time during normal weekday business hours.)
Resolution | |
Point-to-Point | 0.29 nm |
Information limit | 0.19 nm |
Energy resolution | 0.7 eV without monochromator |
0.15 eV with monochromator | |
STEM Spatial Resolution | |
BF/DF | 0.45 nm |
HAADF (attainable) | 0.45 nm |
Electron emitter |
ZrO/W-field emitter system (Schottky) |
Illumination System |
Parallel wide field TEM mode 0.1 urad to 20 mrad illumination aperture |
Objective lens: HT objective | |
Cs (Spherical aberration) | 2.2 mm |
Cc (Chromatic aberration) | 2.2 mm |
Specimen Stage | |
Double tilt holder | angle ±70 deg /±30 deg |
Cryo double tilt holder | angle ±49 deg /±30 deg |
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