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Title: Quantitative analysis of total reflection X-ray fluorescence from finely layered structures using XeRay

Journal Article · · Review of Scientific Instruments
DOI:https://doi.org/10.1063/1.4978654· OSTI ID:1377924

Total reflection x-ray fluorescence (TXRF) is a widely applicable experimental technique for studying chemical element distributions across finely layered structures at extremely high sensitivity. To promote and facilitate scientific discovery using TXRF, we developed a MATLAB-based software package with a graphical user interface, named XeRay, for quick, accurate, and intuitive data analysis. XeRay lets the user model any layered system, each layer with its independent chemical composition and thickness, and enables fine-tuned data fitting. The accuracy of XeRay has been tested in the analysis of TXRF data from both air/liquid interface and liquid/liquid interfacial studies and has been compared to literature results. In an air/liquid interface study, Ca2+ sequestration was measured at a Langmuir monolayer of 1-stearoyl-2-oleoyl-sn-glycero-3-phosphatidic acid (SOPA) on a buffer solution of 1 mM CaCl2 at pH 7.5. Data analysis with XeRay reveals that each 1 nm2 of interfacial area contains 2.38 ± 0.06 Ca2+ ions, which corresponds to a 1:1 ratio between SOPA headgroups and Ca2+ ions, consistent with several earlier reports. For the liquid/liquid interface study of Sr2+ enrichment at the dodecane/surfactant/water interface, analysis using XeRay gives a surface enrichment of Sr2+ at $$68^{+6}_{-5}$$ Å2 per ion, consistent with the result published for the same dataset.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE; National Science Foundation (NSF)
Grant/Contract Number:
AC02-06CH11357; NSF/CHE-1346572
OSTI ID:
1377924
Alternate ID(s):
OSTI ID: 1373959
Journal Information:
Review of Scientific Instruments, Vol. 88, Issue 3; ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
ENGLISH

References (27)

Total reflection of x-ray fluorescence (TXRF): a mature technique for environmental chemical nanoscale metrology journal June 2009
X-ray fluorescence and energy dispersive x-ray diffraction for the quantification of elemental concentrations in breast tissue journal December 2003
Calcium Induced Nonideal Mixing in Liquid-Crystalline Phosphatidylcholine−Phosphatidic Acid Bilayer Membranes journal February 2000
Reference-Free Total Reflection X-ray Fluorescence Analysis of Semiconductor Surfaces with Synchrotron Radiation journal October 2007
X-ray Studies of Interfacial Strontium–Extractant Complexes in a Model Solvent Extraction System journal October 2014
Interfacial Properties and Iron Binding to Bacterial Proteins That Promote the Growth of Magnetite Nanocrystals: X-ray Reflectivity and Surface Spectroscopy Studies journal February 2012
Total reflection x‐ray fluorescence spectroscopy using synchrotron radiation for wafer surface trace impurity analysis (invited) journal February 1995
Total reflection X-ray fluorescence and grazing incidence X-ray spectrometry — Tools for micro- and surface analysis. A review journal September 2009
Total reflection X-ray fluorescence spectrometry for quantitative surface and layer analysis journal November 1991
Recent trends in total reflection X-ray fluorescence spectrometry for biological applications journal February 2009
Preferential Affinity of Calcium Ions to Charged Phosphatidic Acid Surface from a Mixed Calcium/Barium Solution: X-ray Reflectivity and Fluorescence Studies journal January 2009
Competitive cation binding to phosphatidylinositol-4,5-bisphosphate domains revealed by X-ray fluorescence journal January 2015
The liquid surface/interface spectrometer at ChemMatCARS synchrotron facility at the Advanced Photon Source journal August 2003
Quantitative Determination of Lateral Concentration and Depth Profile of Histidine-Tagged Recombinant Proteins Probed by Grazing Incidence X-ray Fluorescence journal April 2013
Total reflection x-ray fluorescence analysis—a review journal January 2007
Iron near absorption edge X-ray spectroscopy at aqueous-membrane interfaces journal January 2014
Progress in the theory and interpretation of XANES journal January 2005
Application of X-ray fluorescence spectrometry to determination and quantitation of metals in vegetal material journal March 2009
Membrane recognition by phospholipid-binding domains journal February 2008
Optical Flats for Use in X‐Ray Spectrochemical Microanalysis journal July 1971
X-ray fluorescence from a model liquid/liquid solvent extraction system journal November 2011
Calcium Signaling journal December 2007
Total reflection X-ray fluorescence study of Langmuir monolayers on water surface journal April 2003
Structural and thermotropic properties of calcium-dimyristoylphosphatidic acid complexes at acidic and neutral pH conditions journal October 1995
Metallic multilayers for x rays using classical thin-film theory journal January 1984
Polymer/Calcium Carbonate Layered Thin-Film Composites journal October 2000
X-ray fluorescence spectrometry in art and archaeology journal January 2000

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