Open Access
Eur. Phys. J. Appl. Phys.
Volume 73, Number 2, February 2016
Article Number 20701
Number of page(s) 7
Section Imaging, Microscopy and Spectroscopy
Published online 29 February 2016

© The Author(s) 2016

Licence Creative Commons
This article is distributed under the terms of the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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