X-Ray Imaging

We develop and apply imaging techniques such as X-ray holography[1] coherent X-ray diffraction imaging[2], X-ray Ptychography[3,4], X-ray fluorescence nanoanalysis, and nanoprobe small angle X-ray scattering using radiation from synchrotron sources and free electron lasers. X-ray imaging techniques provide high spatial resolution below 50 nm with intrinsic chemical contrast. In particular, for biological samples, micro X-ray fluorescence analysis (µ-XRF) of cryogenically frozen biological cells (e.g. transfected cells, diatoms, bacteria) and tissue samples (e.g. heavy metal infused plants, tissue sections) provides a unique inside into their elemental composition. In collaboration with the P06 team at DESY we develop a new cryogenic X-ray nanoanalysis platform dedicated for the XRF analysis of biological samples.

Students working on this project: Andreas Gräfenstein & Dr. Christoph Rumancev

Collaboration with Dr. Schröder, Dr. Garrevoet, Dr. Falkenberg, Prof. Schroer, DESY

XRF Imaging

[1] A. Rosenhahn, R. Barth, F. Staier, T. Simpson, S. Mittler, S. Eisebitt and M. Grunze,
Journal of the Optical Society of America A – Optics Image Science and Vision 2008, 25, 416-422, DOI: 10.1364/JOSAA.25.000416

[2] A. P. Mancuso, T. Gorniak, F. Staier, O. M. Yefanov, R. Barth, C. Christophis, B. Reime, J. Gulden, A. Singer, M. E. Pettit, T. Nisius, T. Wilhein, C. Gutt, G. Grübel, N. Guerassimova, R. Treusch, J. Feldhaus, S. Eisebitt, E. Weckert, M. Grunze, A. Rosenhahn and I. A. Vartanyants, New Journal of Physics 2010 , 12, 035003

[3] K. Giewekemeyer, M. Beckers, T. Gorniak, M. Grunze, T. Salditt and A. Rosenhahn,
Optics Express 2011 , 19, 1037-1050, DOI: 10.1364/OE.19.001037

[4] M. Beckers, T. Senkbeil, T. Gorniak, M. Reese, K. Giewekemeyer, S. C. Gleber, T. Salditt and A. Rosenhahn, Physical Review Letters 2011 , 107, 208101, DOI: 10.1103/PhysRevLett.107.208101