The Tecnai G2 F30 S-TWIN microscope is a versatile, general use microscope designed for high-resolution TEM and STEM characterization and equipped with multiple chemical analysis systems.

Capabilities include:

• Bright-field, dark-field, high-resolution TEM and STEM imaging and diffraction.
• Electron tomography to explore three-dimensional sample information.
• Electron holography to map electric and magnetic field distribution.
• Thin-window X-ray energy-dispersive spectroscopy (EDS) for quantitative nanoscale mapping of elements with Z>5.
• Electron energy-loss spectroscopy (EELS) for single-spectrum, line, and mapping chemical analysis in STEM or energy-filtered imaging in TEM (EFTEM).

General Specifications:

• Accelerating Voltage = 300 kV
• TEM Information Limit = 1.02 Å
• TEM Point Resolution = 2.0 Å
• STEM Point Resolution = 1.4 Å
• Spherical Aberration (Cs) = 1.2 mm
• Chromatic Aberration (Cc) = 2 mm
• EELS Energy Resolution = 0.7 eV

Detectors:

• TEM/Diffraction/Movies – Gatan Ultrascan 2k × 2k CCD, 4-30 fps.
• STEM – High-angle annular dark-field (HAADF), BF & DF detectors.
• EDS – EDAX thin-window SDD X-ray detector (30 mm² active area, 0.13 srad).
• EELS – Gatan Tridiem 863 UHS.

Sample Holders:

• FEI single-tilt [±30°,-].
• FEI low-background double-tilt [±30°,±26°].
• Fischione 2050 tomography [±70°,-].
• Gatan 626 ST cryo-transfer [±70°,-] – -170 to 100 °C.
• Gatan 925 DT low-background cryo-transfer [±30°,±26°] – -170 to 100 °C.
• Gatan 648 DT air-free transfer [±30°,±26°].
• Gatan 652.IN DT heating (Inconel) [±30°,±26°] – ≤850 °C.
• Protochips Fusion Select DT EHR [±30°,±20°] – Heating (≤1200 °C) and/or biasing, 4PP. No AXON on this microscope.
• Hysitron PI-95 PicoIndenter [±30°,-] – Quantitative mechanical compression, tension, high-cycle fatigue, 2D tribology, heating (≤300 °C), biasing.
• Gatan 654 mechanical straining [±30°,-].
• NanoFactory STM-biasing [±30°,-] – Nanomanipulator probe.
• Hummingbird Scientific 1400 liquid flow [±30°,-] – Optional eating or electrochemistry.
• NanoFactory biasing (for discovery platforms) [±30°,-] – Compatible with electrochemical discovery platform.

Contacts:
Stephen House
Winson Kuo

Research Highlight:
Phase evolution and structural modulation during in situ lithiation of MoS2, WS2 and graphite in TEM
Ghosh, C.; Singh, M. K.; Parida, S.; Janish, M. T.; Dobley, A.; Dongare, A. M.; Carter, C. B. Scientific Reports 2021, 11 (1). doi.org/10.1038/s41598-021-88395-1