The TEM Gemini Centre is a collaboration between the Norwegian University of Science and Technology (NTNU) and SINTEF. The TEM infrastructure is owned by the Department of Physics, NTNU, and make up the Trondheim node of the Norwegian national TEM infrastructure, NORTEM.
NTNU provides access to a well-equipped all round preparation lab including mechanical thinning, tripod polishing (Allied Multiprep system), electro-polishing (Struers Tenupol), dimplers, three ion thinners (Gatan Precision Ion Polishing Systems), Fischione plasma cleaner, diamond wire saws, ultra-sonic grinders and ultramicrotomes The Centre can also provide access to FIB sample preparation (Helios Nanolab and Helios G4). For nearly all preparation techniques there are written procedures in place.
(i) The double corrected cold field emission gun JEOL ARM 200CF
(ii) The field emission gun JEOL 2100F
JEOL ARM 200CF: The coldFEG (energy spread of < 0.3 eV) TEM with both probe and image spherical aberration correction and the most advanced EDX and EELS systems allow unique studies at the atomic scale. The ARM200F is placed in a custom designed room with water cooled walls and field cancellation and is fully aligned at 80 and 200 kV. The microscope has a large angle (0.98 sr) Centurio EDX detector and a Gatan Quantum fast dual EELS set-up (2k CCD) with several cameras (2k Orius CCD (side mounted) and 2k UltraScan XP CCD (bottom mounted)). Many detectors for STEM are available (BF(2x), ABF, ADF, and HAADF(2x)), the STEM and HRTEM resolutions are at ~0.8 Å. Holders available are, in addition to standard single and double tilt holders, cold stage, heating MEMS, environmental cell/transfer, tomography and a rotation holder.
JEOL 2100F: This field emission TEM is optimized for all-round STEM and HREM, targeting advanced materials studies. In addition, it has special extensions for scanning precession electron diffraction (SPED) for orientation/phase mapping, and tomography. It has a Gatan 2k UltraScan CCD, bottom mounted and BF and HAADF STEM detectors and an Oxford X-Max 80 SDD EDX detector.
The TEM Gemini Centre has a well-equipped data analysis facility, including computers (as well as access to computer teaching rooms for workshops) dedicated for tomography, ARM and Digital Microscope offline tools (including several plug ins as SmartAlign and GPA), INDEX, and several crystallographic programs (e.g. MacTempas, JEMS). NTNU is actively involved in open source software developments (especially Python based codes as HyperSpy) taking advantage of the good education at NTNU in Python programming and computational physics.