Ubicación:Location: lma - zaragoza
The titan High-Base has a spherical aberration corrector (CEOS Company) at the objective lens, the lens that forms the image. It is therefore ideal for ultra-high resolution imaging (HRTEM). It also has a biprism for Electron Holography analysis and a Lorentz Lens to perform High Resolution Lorentz Microscopy.
Working at low-voltage, and because of the aberration corrector, we can obtain high resolution images even on beam-sensitive materials such as graphene, carbon nanotubes, zeolites and mesoporous materials…
The working voltages for this instrument are: 60, 80, 120, 200 and 300 kV.
What can be done with it?
Image (0.07nm resolution):
- Size and morphology information (TEM).
- Crystalline Structure (Electron Diffraction & High Resolution TEM).
- Composition: Scanning-Transmission Imaging with a High Angle Annular Dark Field detector (STEM-HAADF). The contrast in the image depends on the atomic number (Z-contrast). Energy Filtered TEM (EFTEM) yields information about a specific element.
Electron Energy Loss Spectroscopies (EELS).
Combined with the STEM mode: chemical composition with spatial resolution: composition maps and profiles.
Vector Field analysis:
- Electric and magnetic field studies by Electron Holography.
- Magnetic domain studies by Lorentz Microscopy.
- Stress and strain studies by HRTEM imaging.
In-Situ physical properties measurements:
- Changes of crystalline phase (Electron diffraction).
- Defect structure by bright field/dark field imaging (BF/DF) and Weak Beam imaging (WBDF).
HREM: since this microscope is devoted for High Resolution Transmission Electron Microscopy (HRTEM) studies, it is equipped with a SuperTwin® objective lens and a CETCOR Cs-objective corrector from CEOS Company allowing a point to point resolution of 0.09 nm.
STEM: In addition this Titan3 is equipped with the basic STEM facilities (BF, DF detectors) for STEM imaging at medium resolution.
EELS: a Gatan Energy Filter Tridiem 863 allows Titan3 to perform EELS experiments in a standard and routine way (energy resolution of ̴0.7 eV).
Lorentz and holography: as for the dedicated Titan STEM, beside these spectroscopy capabilities, the Titan3 corrected microscope is fitted with a Lorentz lens and an electrostatic biprism allowing Lorentz and medium resolution electron holography experiments to be carried on.