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Publication Detail
Coherent x-ray diffraction imaging of paint pigment particles by scanning a phase plate modulator
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Chen B, Zhang FC, Berenguer F, Bean RJ, Kewish CM, Vila-Comamala J, Chu YS, Rodenburg JM, Robinson IK
  • Publisher:
    IOP PUBLISHING LTD
  • Publication date:
    19/10/2011
  • Journal:
    NEW J PHYS
  • Volume:
    13
  • Print ISSN:
    1367-2630
  • Language:
    EN
  • Keywords:
    ALKYD, PERFORMANCE, COATINGS, OIL
  • Addresses:
    Chen, B
    UCL
    London Ctr Nanotechnol
    London
    WC1H 0AH
    England

    UCL
    Dept Phys & Astron
    London
    WC1H 0AH
    England
Abstract
We have implemented a coherent x-ray diffraction imaging technique that scans a phase plate to modulate wave-fronts of the x-ray beam transmitted by samples. The method was applied to measure a decorative alkyd paint containing iron oxide red pigment particles. By employing an iterative algorithm for wave-front modulation phase retrieval, we obtained an image of the paint sample that shows the distribution of the pigment particles and is consistent with the result obtained from a transmission x-ray microscope. The technique has been experimentally proven to be a feasible coherent x-ray imaging method with about 120 nm spatial resolution and was shown to work well with industrially relevant specimens.
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