Alfaro-Mozaz, F. J.
Alonso-González, P.
Vélez, S.
Dolado, I.
Autore, M.
Mastel, S. http://orcid.org/0000-0001-9950-5233
Casanova, F.
Hueso, L. E.
Li, P.
Nikitin, A. Y.
Hillenbrand, R.
Article History
Received: 10 October 2016
Accepted: 9 April 2017
First Online: 7 June 2017
Competing interests
: R.H. is co-founder of Neaspec GmbH, a company producing scattering-type scanning near-field optical microscope systems, such as the one used in this study. The remaining authors declare no competing financial interests.