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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 11, Iss. 19 — Sep. 22, 2003
  • pp: 2335–2343

Tomographic diffractive imaging of monolayer crystals at atomic resolution with one-dimensional compact support

U. Weierstall, J. Spence, and G. Hembree  »View Author Affiliations


Optics Express, Vol. 11, Issue 19, pp. 2335-2343 (2003)
http://dx.doi.org/10.1364/OE.11.002335


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Abstract

A solution to the phase problem for diffraction by two-dimensional crystalline slabs is described, based on the application of a compact support normal to the slab. Specifically we apply the iterative Gerchberg-Saxton-Fienup algorithm to simulated three-dimensional transmission electron diffraction data from monolayer organic crystals. We find that oversampling normal to the monolayer alone does not solve the phase problem in this geometry in general. However, based on simulations for a crystalline monolayer (tetracyanoethylene), we find that convergence is obtained if phases are supplied from a few high-resolution electron microscope images recorded at small tilts to the beam direction. Since current cryomicroscopy methods required a large number of images to phase tomographic diffraction data, this method should greatly reduce the labor involved in data acquisition and analysis in cryo-electron microscopy of organic thin crystals by avoiding the need to record images at high tilt angles. We discuss also the use of laser tweezers as a method of supporting nanoparticles in TEM for diffractive imaging

© 2003 Optical Society of America

OCIS Codes
(100.3190) Image processing : Inverse problems
(100.5070) Image processing : Phase retrieval

ToC Category:
Focus Issue: Coherent x-ray optics

History
Original Manuscript: July 28, 2003
Revised Manuscript: August 29, 2003
Published: September 22, 2003

Citation
U. Weierstall, J. Spence, and G. Hembree, "Tomographic diffractive imaging of monolayer crystals at atomic resolution with onedimensional compact support," Opt. Express 11, 2335-2343 (2003)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-11-19-2335


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