Li, Qing
Lin, Wenzhi
Yan, Jiaqiang
Chen, Xin
Gianfrancesco, Anthony G.
Singh, David J.
Mandrus, David
Kalinin, Sergei V.
Pan, Minghu
Article History
Received: 26 February 2014
Accepted: 23 September 2014
First Online: 7 November 2014
Competing interests
: The authors declare no competing financial interests.