Hu, Wenqi
Lum, Guo Zhan
Mastrangeli, Massimo
Sitti, Metin
Article History
Received: 19 September 2017
Accepted: 1 December 2017
First Online: 24 January 2018
Competing interests
: Max Planck Innovation filed a provisional patent application on behalf of all authors (PCT/EP2017/084408) based on the methods and results presented here.