AVS 60th International Symposium and Exhibition
    Synchrotron Analysis Focus Topic Wednesday Sessions
       Session SA+AS+MI+SS-WeM

Paper SA+AS+MI+SS-WeM3
An Imaging NEXAFS Detector for Compositional and Structural Analysis

Wednesday, October 30, 2013, 8:40 am, Room 203 C

Session: Synchrotron and Imagery: PEEM, Nano-ARPES and Others (8:00-9:40 am)/Synchrotron TXRF and Related Techniques (10:40 am-12:00 pm)
Presenter: C. Weiland, Synchrotron Research, Inc.
Authors: C. Weiland, Synchrotron Research, Inc.
Z. Fu, National Institute of Standards and Technology (NIST)
C. Jaye, National Institute of Standards and Technology (NIST)
D. Fischer, National Institute of Standards and Technology (NIST)
K. Scammon, University of Central Florida
P. Scobol, Synchrotron Research, Inc.
E. Principe, Synchrotron Research, Inc.
Correspondent: Click to Email

We present the development of the second generation Large Area Rapid Imaging Analytical Tool (LARIAT MKII) for near edge x-ray absorption fine structure (NEXAFS) surface chemical and structural analysis. This analyzer utilizes magnetostatic electron optical elements to maintain the lateral distribution of electrons into a 16 mega channel detector, while providing a near 180o collection angle for high collection efficiency enabling rapid parallel imaging. A series of electrostatic lenses can be used to tune the energy and depth sensitivity of the imaged electrons allowing for 3D analysis of the near surface region (<7nm). The first LARIAT MKII will be installed on the NIST SST beamline at NSLS II; initial testing is currently being performed at NSLS beamline U8B.

The first generation LARIAT has demonstrated capabilities in determining simultaneously the concentration and orientation of single-strand DNA micro array sensors, organic electronic combinantorial device arrays, and semifluorinated molecular gradients. Additionally, LARIAT MKI was used to identify cancerous versus non-cancerous dermal tissue through spectroscopic analysis. LARIAT MKII advances these capabilities by improving the lateral resolution of the analyzer to below 7 µm and improving collection efficiency through a series of gridless electrostatic lenses. Here we will present an overview of LARIAT MKII and its capabilities, as well as some of the initial data recorded from the system.