Ptychographic X-ray imaging of colloidal crystals

S. Lazarev, I. Besedin, A.V. Zozulya, J.-M. Meijer, D. Dzhigaev, O.Y. Gorobtsov, R.P. Kurta, M. Rose, A.G. Shabalin, E.A. Sulyanova, I. Zaluzhnyy, A.P. Menushenkov, M. Sprung, A.V. Petukhov, I.A. Vartanyants

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3 Citations (Scopus)

Abstract

Ptychographic coherent X-ray imaging is applied to obtain a projection of the electron density of colloidal crystals, which are promising nanoscale materials for optoelectronic applications and important model systems. Using the incident X-ray wavefield reconstructed by mixed states approach, a high resolution and high contrast image of the colloidal crystal structure is obtained by ptychography. The reconstructed colloidal crystal reveals domain structure with an average domain size of about 2 µm. Comparison of the domains formed by the basic close-packed structures, allows us to conclude on the absence of pure hexagonal close-packed domains and confirms the presence of random hexagonal close-packed layers with predominantly face-centered cubic structure within the analyzed part of the colloidal crystal film. The ptychography reconstruction shows that the final structure is complicated and may contain partial dislocations leading to a variation of the stacking sequence in the lateral direction. As such in this work, X-ray ptychography is extended to high resolution imaging of crystalline samples.

Original languageEnglish
Article number1702575
Number of pages8
JournalSmall
Volume14
Issue number3
DOIs
Publication statusPublished - 18 Jan 2018

Keywords

  • coherent X-ray diffraction imaging
  • colloidal crystals
  • domain structures
  • ptychography

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    Lazarev, S., Besedin, I., Zozulya, A. V., Meijer, J-M., Dzhigaev, D., Gorobtsov, O. Y., ... Vartanyants, I. A. (2018). Ptychographic X-ray imaging of colloidal crystals. Small, 14(3), [1702575]. https://doi.org/10.1002/smll.201702575