Scanning Transmission Electron Microscopy
Scanning Transmission Electron Microscopy
Develops and advances new STEM- Scanning Electron Energy Loss Spectroscopy (EELS) techniques and push the spatial, temporal, and energy resolution limits for imaging and spectroscopy. Capabilities available to users include:
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JEOL NEOARM TEM/STEM
- Cold FEG
- Operation voltages: 30, 60, 80 and 200 kV
- CEOS probe corrector:
- 0.078 nm at 200 kV
- 0.140 nm at 30 kV
- Low dose imaging
- Enhanced ABF detector
- Large-angle SDD detector for EDX
- Integrated LN2 cooling/bias/heating stage
- EELS 965 Quantum ER
- 330 meV at 300 kV
- 260 meV at 30 kV
- 4D-Canvas pixelated detector:
- 1 kfps (256x256), 4kfps (256x64)
- Single electron sensitivity SNR 300:1 (80 keV)
- Cold FEG
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Low-voltage (60-100kV) aberration-corrected STEM/EELS (Nion UltraSTEM)
- Cold FEG and ultrahigh vacuum column
- Equipped with a 5th order aberration-corrector
- Operation at any voltage between 60 to 100 kV
- 0.1 nm maximum spatial resolution (at 100 kV)
- 300 meV energy resolution for EELS
- Fast SCMOS Camera for 4d-STEM
- Equipped with a holder that enables heating & biasing capabilities
- Cold FEG and ultrahigh vacuum column
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Low-voltage (60-100kV) monochromated, aberration-corrected (MAC)-STEM/EELS (Nion Hermes)
- Cold FEG and ultrahigh vacuum column
- Equipped with next generation 𝛼-monochromator and 5th Order Aberration-corrector capable of cutting-edge energy resolution for low-loss EELS while retaining sub-Ångstrom spatial resolution
- 0.1 nm maximum spatial resolution (at 100 kV)
- Fast SCMOS Camera for 4d-STEM
- Equipped with a holder that enables heating & biasing capabilities
- Side entry stage that enables liquid nitrogen cryogenic experiments (summer 2021)
- Energy resolution better than 5 meV, excitations detectable at energies low as 15 meV (80 µm, 120 cm-1, 3.6 THz), providing access to access to excitations such as phonons, molecular vibrations, and other mid-infrared quasiparticles.
- Aloof excitations capable of gently probing beam sensitive materials such as encapsulated liquids, amino acids, and whole-cell biological samples with nanoscale spatial resolution.
- Off-axis EELS acquisitions suppress delocalized aloof contributions to enable ultrahigh resolution analysis of ultralow energy excitations.
- Q-slit EELS aperture enables 0.5 Å-1 momentum-resolution while retaining 2-3 nm spatial resolution at maximum monochromation, for fast-efficient phonon dispersion measurements.
- Cold FEG and ultrahigh vacuum column
