12-02 :: February/March 2012
Gold particles with rows of atoms, seen as ridges, across them. © The Faculty of Engineering at the University of Sheffield
grow over days or weeks, they do not have to be disturbed. Plans are even being put into place with the European Space Agency to take the new, more robust, microscope technology to the moon in 2018 to examine the structure of moon soil.
Professor Rodenburg added: “We measure diffrac- tion patterns rather than images. What we record is equivalent to the strength of the electron, X-ray or light waves which have been scattered by the ob- ject – this is called their intensity. However, to make an image, we need to know when the peaks and troughs of the waves arrive at the detector – this is called their phase.”
The investigation was carried out with the help of Phase Focus Ltd, a University of Sheffield spin-out company, and Gatan Inc.
OPEN: J.M. Rodenburg, M.J. Humphry, B. Kraus, A.C. Hurst, A.M. Maiden: Ptychographic electron microscopy using high-angle dark-field scattering for sub-nanometre re- solution imaging, In: Nature Communications, Vol. 3(2012), March 06, 2012, Article number 730, DOI:10.1038/ ncomms1733: