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Combinatorial Near-Edge X-Ray Absorption Fine Structure: Simultaneous Determination of Molecular Orientation and Bond Concentration on Chemically Heterogeneous Surfaces

Published

Author(s)

Jan Genzer, Daniel A. Fischer, K Efimenko

Abstract

We show that simultaneous molecular orientation and bond chemistry of planar chemically heterogeneous surfaces can be obtained by combining near edge X-ray absorption fine structure (NEXAFS) spectroscopy and rastering the incident X-ray beam on the specimen. This rastering procedures serially two-dimensional NEXAFS images in space and energy revealing information about the chemistry (including bond concentration) and orientation of the surface-bound molecules with sub-millimeter planar spatial resolution and sub-monolayer molecular sensitivity. We illustrate the power of the combinatorial NEXAFS method by simultaneously probing the concentration and molecular orientation of semifluorinated (SF) molecules in double SF molecular gradients on flat silica substrates.
Citation
Applied Physics Letters
Volume
82 No. 2

Keywords

monolayers, NEXAFS, orientation, soft x-ray

Citation

Genzer, J. , Fischer, D. and Efimenko, K. (2003), Combinatorial Near-Edge X-Ray Absorption Fine Structure: Simultaneous Determination of Molecular Orientation and Bond Concentration on Chemically Heterogeneous Surfaces, Applied Physics Letters (Accessed February 29, 2024)
Created December 31, 2002, Updated October 12, 2021