AN INTEGRATED NANO-AUGER ELECTRON SPECTROSCOPY SYSTEM: SURFACE TO BULK CHARACTERIZATION OF MATERIALS
We have equipped a PHI 710 Scanning Auger Nanoprobe System with a field emission electron source and high performance EDS and EBSD detectors. This combination of detectors allows us to acquire at a given location: 1) nano-scale images, 2) “bulk” analysis of materials and elemental X-ray maps using EDS, 3) identification and crystallographic orientation of phases using EBSD, and 4) composition, elemental maps and depth profiling of surface components using AES on micron-scale grains, in situ, and in near real-time. These capabilities will extend research opportunities in characterization of minerals involved with surface-mediated processes such as sorption, catalysis, dissolution/precipitation, and redox reactions. Example applications that will be presented include biocorrosion of steel and sorption of heavy metals on ferri-oxyhydroxide minerals. This instrument is housed at the Imaging and Chemical Analysis Laboratory at Montana State University (http://www.physics.montana.edu/ical) and is part of the MONT National Nanotechnology Coordinated Infrastructure network. We welcome proposed collaborative research projects from across the Earth and environmental sciences.