Li Hao, Fu Zhi-Bing, Wang Hong-Bin, Yi Yong, Huang Wei, Zhang Ji-Cheng. Preperetions of bi-layer and multi-layer graphene on copper substrates by atmospheric pressure chemical vapor deposition and their mechanismsJ. Acta Physica Sinica, 2017, 66(5): 058101. DOI: 10.7498/aps.66.058101