Li, Y.
Zakharov, D.
Zhao, S.
Tappero, R.
Jung, U.
Elsen, A.
Baumann, Ph.
Nuzzo, R.G.
Stach, E.A.
Frenkel, A.I.
Article History
Received: 4 March 2015
Accepted: 20 May 2015
First Online: 29 June 2015
Competing interests
: The authors declare no competing financial interests.