Pradhan, N. R.
Rhodes, D.
Memaran, S.
Poumirol, J. M.
Smirnov, D.
Talapatra, S.
Feng, S.
Perea-Lopez, N.
Elias, A. L.
Terrones, M.
Ajayan, P. M.
Balicas, L.
Article History
Received: 15 September 2014
Accepted: 12 February 2015
First Online: 11 March 2015
Competing interests
: The authors declare no competing financial interests.