Tang Yanhao, Mak Kin Fai
Department of Physics and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, USA.
Nat Nanotechnol. 2017 Dec;12(12):1121-1122. doi: 10.1038/nnano.2017.230. Epub 2017 Oct 23.