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Application toward confocal full-field microscopic X-ray absorption near edge structure spectroscopy

(2017) ANALYTICAL CHEMISTRY. 89(3). p.2123-2130
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Abstract
Using X-ray absorption near edge structure (XANES) spectroscopy, information on the local chemical structure and oxidation state of an element of interest can be acquired. Conventionally, this information can be obtained in a spatially resolved manner by scanning a sample through a focused X-ray beam. Recently, full-field methods have been developed to obtain direct 2D chemical state information by imaging a large sample area. These methods are usually in transmission mode, thus restricting the use to thin and transmitting samples. Here, a fluorescence method is displayed using an energy-dispersive pnCCD detector, the SLcam, characterized by measurement times far superior to what is generally applicable. Additionally, this method operates in confocal mode, thus providing direct 3D spatially resolved chemical state information from a selected subvolume of a sample, without the need of rotating a sample. The method is applied to two samples: a gold-supported magnesia catalyst (Au/MgO) and a natural diamond containing Fe-rich inclusions. Both samples provide XANES spectra that can be overlapped with reference XANES spectra, allowing this method to be used for fingerprinting and linear combination analysis of known XANES reference compounds.
Keywords
TEMPERATURE CO OXIDATION, MAIA DETECTOR ARRAY, GOLD NANOPARTICLES, LOWER MANTLE, AEROBIC OXIDATION, TRANSITION ZONE, BENZYL ALCOHOL, FE SPECIATION, MICRO-XANES, MATO-GROSSO

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Citation

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Chicago
Tack, Pieter, Bart Vekemans, Brecht Laforce, Jennifer Rudloff-Grund, Willinton Y Hernández, Jan Garrevoet, Gerald Falkenberg, Frank Brenker, Pascal Van Der Voort, and Laszlo Vincze. 2017. “Application Toward Confocal Full-field Microscopic X-ray Absorption Near Edge Structure Spectroscopy.” Analytical Chemistry 89 (3): 2123–2130.
APA
Tack, Pieter, Vekemans, B., Laforce, B., Rudloff-Grund, J., Hernández, W. Y., Garrevoet, J., Falkenberg, G., et al. (2017). Application toward confocal full-field microscopic X-ray absorption near edge structure spectroscopy. ANALYTICAL CHEMISTRY, 89(3), 2123–2130.
Vancouver
1.
Tack P, Vekemans B, Laforce B, Rudloff-Grund J, Hernández WY, Garrevoet J, et al. Application toward confocal full-field microscopic X-ray absorption near edge structure spectroscopy. ANALYTICAL CHEMISTRY. 2017;89(3):2123–30.
MLA
Tack, Pieter, Bart Vekemans, Brecht Laforce, et al. “Application Toward Confocal Full-field Microscopic X-ray Absorption Near Edge Structure Spectroscopy.” ANALYTICAL CHEMISTRY 89.3 (2017): 2123–2130. Print.
@article{8516103,
  abstract     = {Using X-ray absorption near edge structure (XANES) spectroscopy, information on the local chemical structure and oxidation state of an element of interest can be acquired. Conventionally, this information can be obtained in a spatially resolved manner by scanning a sample through a focused X-ray beam. Recently, full-field methods have been developed to obtain direct 2D chemical state information by imaging a large sample area. These methods are usually in transmission mode, thus restricting the use to thin and transmitting samples. Here, a fluorescence method is displayed using an energy-dispersive pnCCD detector, the SLcam, characterized by measurement times far superior to what is generally applicable. Additionally, this method operates in confocal mode, thus providing direct 3D spatially resolved chemical state information from a selected subvolume of a sample, without the need of rotating a sample. The method is applied to two samples: a gold-supported magnesia catalyst (Au/MgO) and a natural diamond containing Fe-rich inclusions. Both samples provide XANES spectra that can be overlapped with reference XANES spectra, allowing this method to be used for fingerprinting and linear combination analysis of known XANES reference compounds.},
  author       = {Tack, Pieter and Vekemans, Bart and Laforce, Brecht and Rudloff-Grund, Jennifer and Herna\unmatched{0301}ndez, Willinton Y and Garrevoet, Jan and Falkenberg, Gerald and Brenker, Frank and Van Der Voort, Pascal and Vincze, Laszlo},
  issn         = {0003-2700},
  journal      = {ANALYTICAL CHEMISTRY},
  keyword      = {TEMPERATURE CO OXIDATION,MAIA DETECTOR ARRAY,GOLD NANOPARTICLES,LOWER MANTLE,AEROBIC OXIDATION,TRANSITION ZONE,BENZYL ALCOHOL,FE SPECIATION,MICRO-XANES,MATO-GROSSO},
  language     = {eng},
  number       = {3},
  pages        = {2123--2130},
  title        = {Application toward confocal full-field microscopic X-ray absorption near edge structure spectroscopy},
  url          = {http://dx.doi.org/10.1021/acs.analchem.6b04828},
  volume       = {89},
  year         = {2017},
}

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