1. Shandong Technology Center of Nanodevices and Integration, School of Integrated Circuits, Shandong University , Jinan , 250100 , China
2. Institute of Novel Semiconductors, Shandong University , Jinan , 250100 , China
3. Department of Critical Care Medicine, Qilu Hospital, Cheeloo College of Medicine, Shandong University , Jinan , 250100 , China
4. Department of Electrical and Electronic Engineering , University of Manchester , Manchester , M13 9PL , UK
5. Center for Integrated Nanotechnologies , Los Alamos National Laboratory , Los Alamos , NM , 87545 , USA