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

Published

January 1, 2003

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

Pub Type

Journals

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 April 26, 2024)