Funding for this research was provided by:
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (168223)
Air Force Office of Scientific Research (FA9550-15-1-0068)
National Science Foundation (IOS-1656260)
National Center of Competence in Research Quantum Science and Technology (Bio-inspired Materials)
Received: 26 May 2017
Accepted: 15 November 2017
First Online: 21 November 2017
Ethics approval and consent to participate
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: The authors declare no competing or financial interests.
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