Electron Microscopy Lab

The electron microscopy lab at the Department of Chemistry is operated by the groups of Prof. Laquai and Prof. Müller-Caspary. It features high-resolution instruments for a great variety of applications in materials science. One key focus is the use and development of 4D STEM methods.

Titan Themis 60-300 (FEI)

Probe corrected, monochromated (scanning) transmission electron microscope

• Resolution around 100 pm in TEM and 80 pm in STEM mode
• Ultrafast electron detector for event based and time resolved (S)TEM, particularly suited for 4D STEM, Timepix T4 (Quantum Detectors)
• Energy dispersive X-ray (EDX) spectroscopy, Super-X detector
• Electron energy loss spectrometer: Gatan Enfinium ER /077
• Programmable phase plate with 48 pixels for electron beam shaping, AdaptEM WaveCrafter
• Various sample holders: tomography, heating, cooling and biasing, vacuum transfer and cryo transfer, among others

Helios G3 UC (FEI)

High resolution SEM with Ga ion column for focused ion beam sample manipulation.

• Landing energy range ~100 eV – 30 keV
• Resolution 0.6 nm (2 kV – 30 kV)
• Gas injection system for Pt deposition
• Oxford AZtec EDX detector
• Several detectors and imaging modes, sensitive for different sample aspects
• STEM possible (< 30 kV)
• Analysis of multilayer cross sections in-situ using Ga⁺ beam preparation
• Site-specific TEM lamella preparation

Tecnai G2 20 S-Twin (FEI)

Transmission electron microscopy with LaB6 emitter, operated at 200 kV.

• Tietz CMOS camera (2k)
• EDAX EDX detector

Further supportive instruments

• H₂/O₂ plasma cleaner, Gatan Solarus
• Ozone cleaner, ZoneTEM II Sunyu
• Instrumentation for mechanical sample preparation and for argon ion milling, Gatan PIPS