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Phys Rev Lett. 2011 Nov 11;107(20):208101. Epub 2011 Nov 8.

Chemical contrast in soft x-ray ptychography.

Author information

1
Applied Physical Chemistry, Ruprecht-Karls-University Heidelberg, Germany. beckers@uni-heidelberg.de

Abstract

The unique strengths of x-ray microscopy are high penetration depth and near-edge resonances that provide chemical information. We use ptychography, a coherent diffractive imaging technique that disposes of the requirement for isolated specimens, and demonstrate resonant imaging by exploiting resonances near the oxygen K edge to differentiate between two oxygen-containing materials. To highlight a biological system where resonant ptychography might be used for chemical mapping of unsliced cells, reconstructions of freeze-dried Deinococcus radiodurans cells at an energy of 517 eV are shown.

PMID:
22181778
DOI:
10.1103/PhysRevLett.107.208101
[Indexed for MEDLINE]

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