Chemical Contrast in Soft X-Ray Ptychography

  • Autor:

    Beckers, M. / Senkbeil, T. / Gorniak, T. / Reese, M. / Giewekemeyer, K. / Gleber, S. / Salditt, T. / Rosenhahn, A. (2011)
  • Quelle:

    Physical Review Letters (2011), 107
  • Datum: 2011

  • Beckers, M. / Senkbeil, T. / Gorniak, T. / Reese, M. / Giewekemeyer, K. / Gleber, S. / Salditt, T. / Rosenhahn, A. (2011): „Chemical Contrast in Soft X-Ray Ptychography“. In: Physical Review Letters (2011), 107

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.


 

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