By Molecular Analysis Facility (MAF)
Make/Model: ThermoFisher Scientific Location: MolES G44O The Apreo-2S is a versatile, high-performance, scanning electron microscope (SEM) capable of single-nanometer resolution and excellent back-scatter contrast on well-prepared materials. No-touch x-ray cone installation simplifies access to low-vacuum charge control. CL detector collects light emission from semiconductors and minerals. EDAX EDS and windowless direct-electron EBSD allow for low energy elemental and grain orientation analysis. Key Capabilities The four available imaging modes are suitable for characterizing a wide range of materials. - Immersion mode with T1, T2, and T3 detectors generally gives the highest resolution images and is suitable for electrically conductive, non-magnetic samples. - Optiplan mode with T1, T2, and ETD detectors can approach 1nm resolution on conductive materials including magnetic samples. - Standard mode with T1 & ETD is suited to high-resolution imaging of rough and porous surfaces. - Low-vacuum mode controls sample charging, enabling SE & BSE imaging of materials with electrical resistance greater than 1010 Ohm without conductive coating. A hybrid 5th mode, compound lens filtering, is available to enhance compositional contrast on non-magnetic samples, Additional detectors: - A retractable cathodoluminescence (CL) detector collects red, green, and blue luminescence from semiconductors and minerals. - Characteristic x-ray analysis and elemental mapping with EDAX EDS. - Crystal orientation imaging with EDAX Clarity windowless direct-electron EBSD as low as 3kV Software: - Native measurement and annotation tools - Signal mixing and filtering capabilities - Thermofisher MAPS with correlative workflow automates large area image acquisition in hi-def and supports import and alignment to images from other sources. - Autoscript customization toolkit with integrated IDE Data Produced - Secondary Electron, Back-scatter Electron, and CL micrographs - EDS spectra and maps - EBSD maps, grain statistics, mis-orientation and strain maps - Hi-Def tile sets of large sample areas Compatible Samples Samples must be compatible with a chamber vacuum of 10-6 mBar. Any residual solvents or residues on the sample that outgas at this pressure will interfere with imaging and can contaminate the instrument. 5-axis motorized eucentric stage, 110 x 110 mm 2 with a 105° tilt range. Maximum sample weight: 5 kg in un-tilted position.
