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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 30, Iss. 12 — Dec. 1, 2013
  • pp: 2627–2634

Diffraction by nanocrystals

Joe P. J. Chen and Rick P. Millane  »View Author Affiliations


JOSA A, Vol. 30, Issue 12, pp. 2627-2634 (2013)
http://dx.doi.org/10.1364/JOSAA.30.002627


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Abstract

X-ray femtosecond nanocrystallography is a new, potentially powerful technique for imaging biological macromolecules that uses ensemble-averaged measurements of diffraction of x-ray free-electron laser pulses from nanocrytalline specimens. Nanocrystals have some diffraction characteristics that are distinct from those of macroscopic crystals, due to the presence of different kinds of unit cell in the crystal and of truncated unit cells on the crystal surface. Expressions are derived for diffraction by nanocrystals with variable and incomplete unit cells, averaged over a distribution of crystal sizes and shapes. The diffraction contains differently modulated Bragg components that are due to interference effects within and between the full and incomplete unit cells. Estimates are obtained for the relative magnitudes of the components. The nature of the diffraction is illustrated by two-dimensional simulations. Implications for molecular imaging are discussed.

© 2013 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(050.1960) Diffraction and gratings : Diffraction theory
(110.7440) Imaging systems : X-ray imaging

ToC Category:
Diffraction and Gratings

History
Original Manuscript: July 11, 2013
Revised Manuscript: October 22, 2013
Manuscript Accepted: October 23, 2013
Published: November 27, 2013

Virtual Issues
Vol. 9, Iss. 2 Virtual Journal for Biomedical Optics

Citation
Joe P. J. Chen and Rick P. Millane, "Diffraction by nanocrystals," J. Opt. Soc. Am. A 30, 2627-2634 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-12-2627

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