Pürckhauer, Korbinian http://orcid.org/0000-0002-5687-7464
Weymouth, Alfred J. http://orcid.org/0000-0001-8793-9368
Pfeffer, Katharina
Kullmann, Lars
Mulvihill, Estefania
Krahn, Michael P. http://orcid.org/0000-0001-7718-9890
Müller, Daniel J. http://orcid.org/0000-0003-3075-0665
Giessibl, Franz J. http://orcid.org/0000-0002-5585-1326
Article History
Received: 15 March 2018
Accepted: 4 June 2018
First Online: 19 June 2018
Competing Interests
: Franz J. Giessibl holds patents in Germany, USA and China to the state-of-the-art qPlus sensor since 2011 and the initial version of the qPlus sensor in Germany and USA since 1996 and 1999 respectively. The authors declare no further competing interests.