XAS Workshop Videos

The videos from the2020 XAS Workshop at the CLS are on YouTube! Check back frequently as new videos are uploaded.

Call for Proposals - Cycle 36 Now Open

We are pleased to announce the Proposals for beamtime July to December, 2022 is now OPEN.  The Call is open from Jan 26 - Feb 23 2022 and is accepting proposals for BioXAS-Spectroscopy Main. See Applying for Beamtime for Information on how to submit Proposal and contact beamline staff for assistance.

Recent Low Concentration Measurements

Recent sensitivity limits of BioXAS-Spectroscopy Main. Including: A Se 115 ppm EXAFS measurement of NIST 611 standard, a sub-ppm measurements of a solid sample - Au L3 edge and a 1 ppm Eu XANES on NIST 614 standard. For more info: https://bioxas-spectroscopy.lightsource.ca/sensitivity-limits/

BioXAS Fall shutdown Update

Many improvements to the storage ring and beamlines are happening during the fall shutdown at the CLS. At BioXAS, engineers and technicians are installing a new air conditioning system to keep the optical elements, detectors, and electronics operating within their optimal temperature ranges. This will increase beam stability and improve the detector signal to noise ratio. The work will be completed for the start of cycle 33 in January 2021. Pictures of the AC installation https://bioxas-spectroscopy.lightsource.ca/media/uploads/news/air-conditioning_installation_bioxas.png.


BioXAS Spectroscopy Beamlines

There are two Hight-Sensitivity Spectroscopy Beamlines at BioXAS: Main and Side. They were specially designed to measure the XAS spectra of transition elements in bulk Biological samples with very diluted concentrations. In practice, this means the photon flux is usable from 5 to 32 keV (it peaks at ~12 keV), and that they have very sensitive fluoresce detectors. These makes the beamlines also very capable for Material and Environmental Science studies as well, where the concentration of the elements of interest are typically higher than in biological samples, so they are easier to measure.

 

Techniques

  • x-ray absorption near edge structure (XANES)
  • Extended X-ray absorption fine structure (EXAFS)

 

Example Research Areas 

  • Chemical forms of trace elements, metals, and metalloids in purified metalloproteins isolated from various biological tissues; for example, human disease specimens, plants, toxic wastes
  • Speciation of toxic elements in mine impacted environment
  • Speciation and crystal structure investigation of materials with applications as semiconductors, memory shape alloys, and catalyzers, among others. 

List of Publications »

  • Jiang, Yi; Deng, Ya-Ping; Liang, Ruilin; Chen, Ning; King, Graham et al. (2022). Linker-Compensated Metal–Organic Framework with Electron Delocalized M .... Journal of the American Chemical Society 144(11) , 4783-4791. 10.1021/jacs.1c10295.
  • Chen, Zhigang; Xu, Yafeng; Ding, Ding; Song, Ge; Gan, Xingxing et al. (2022). Thermal migration towards constructing W-W dual-sites for boosted alka .... Nature Communications 13(1) . 10.1038/s41467-022-28413-6.
  • Zhang, Jiaxi; Wang, Shaofeng; Ma, Xu; Yao, Shuhua; Lv, Hongtao et al. (2022). Observation of surface precipitation of ferric molybdate on ferrihydri .... Science of the Total Environment 807, 150749. 10.1016/j.scitotenv.2021.150749.

Beamline Staff

Roman Chernikov
Beamline Scientist
Office Location: 2070
Tel.  +1 306-657-3814
Fax.  306-657-3535

Emilio Heredia
Associate Scientist
Office Location: 2070
Tel.  +1 306-657-3576
Fax.  306-657-3535

Amanda Quirk
Associate Scientist
Office Location: 2074
Tel.  306-657-3755
Fax.  306-657-3535