Experimental lensless soft‐X‐ray imaging using iterative algorithms: phasing diffuse scattering

Images of randomly placed two‐dimensional arrays of gold balls have been reconstructed from their soft‐X‐ray transmission diffraction patterns. An iterative hybrid input–output (HiO) algorithm was used to solve the phase problem for the continuous distribution of diffuse X‐ray scattering. Knowledge...

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Bibliographic Details
Published in:Acta crystallographica. Section A, Foundations of crystallography Foundations of crystallography, 2003-03, Vol.59 (2), p.143-152
Main Authors: He, H., Marchesini, S., Howells, M., Weierstall, U., Hembree, G., Spence, J. C. H.
Format: Article
Language:English
Subjects:
diffuse scattering
imaging
phasing
Online Access:Get full text
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Summary:Images of randomly placed two‐dimensional arrays of gold balls have been reconstructed from their soft‐X‐ray transmission diffraction patterns. An iterative hybrid input–output (HiO) algorithm was used to solve the phase problem for the continuous distribution of diffuse X‐ray scattering. Knowledge of the approximate size of the clusters was required. The images compare well with scanning electron microscope (SEM) images of the same sample. The use of micrometre‐sized silicon nitride window supports is suggested, and absorption filters have been used to allow collection of low spatial frequencies often obscured by a beam stop. This method of phasing diffuse scattering may have application to scattering from individual inorganic nanostructures or single macromolecules.
ISSN:0108-7673
1600-5724
DOI:10.1107/S0108767302022511