Synchrotron Techniques for the Laboratory: Advances in X-ray compositional, valence, structural and functional characterization in Material to Life Science.

Speaker: 
S H Lau ( VP Business Development, Sigray, Inc.)
Event Date and Time: 
Wed, 2018-06-13 10:00 - 11:00
Location: 
Hennings 318
Local Contact: 
Giorgio Levy,
Intended Audience: 
Graduate

While X-ray techniques within synchrotron are undoubtedly powerful, they tend to be signifcantly oversubscribed, severely limiting access to the majority of researchers. X-ray instruments in a laboratory format, are generally subject to various limitations. Laboratory XRF (x-ray fuorescencee, in particular, is limited in spatial resolution in the 30’s to 100s of micrometers, with chemical sensitivity in the parts-per-million (ppme range. There are currently no commercial lab XAS (X-ray Absorption Spectrometere while existing XRM (X-ray Microscopee techniques often are limited in throughput, requiring integration times in the tens of hours.

We have developed a unique suite of stand-alone laboratory instrumentation, capable of providing equivalent performance to a variety of synchrotron X-ray techniques. This is done by incorporating our patented ultra-high brightness laboratory X-ray source, which not only is wavelength selectable but is 50X brighter than conventional source. This source when paired with an assortment of X-ray lenses, such as parabolic capillary condensers, mirrors, crystal analyzers, and/or Fresnel zone plates, enable a variety of new characterization platforms for the frst time in laboratories. These include high throughput, resolution and high sensitivity probing of samples with access to a variety of X-ray energies / wavelengths. Utilizing this platform, we have developed a suite of products that is potentially disruptive in the x-ray laboratory market.

This includes

  1. micro-XRF system (AttomapTM) capable of providing <8 micron spatial resolutions with chemical sensitivity in the parts-per-billion (ppbe range. High sensitivity non destructive elemental mapping of biological tissue, material, geological and electronic component samples can be quickly done in ambient from Na to U while lower Z elements are possible under vacuum. Upgrading to confocal XRF for 3D depth profling is available.
  2. The QuantumLeapTM XAS provides sub-eV energy resolution, short data collection times, and spatial resolutions in the 10s of micrometers probing oxidation states, bond lengths and neighboring atoms with XANES and EXAF techniques.
  3. nanoXRM. By coupling a Fresnel zone plate objective to a capillary condenser, nano-scale XRM (X-ray Microscopye delivering a non invasive 3D tomography map down to 40 nm spatial resolution and at signifcantly higher throughput than conventional lab systems. The availability of these novel X-ray techniques is envisioned to play a crucial synergistic role in multimodality compositional, ionic, structural and functional characterization in central Electron Microscope facilities. Examples in material science, biological tissue, geology and electronics characterization will be illustrated.
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