42. Kaicheng Jia#, Jincan Zhang#, Li Lin#, Zhenzhu Li, Jing Gao, Luzhao Sun, Ruiwen Xue, Jiayu Li, Ning Kang, Zhengtang Luo, Mark H. Rummeli, Hailin Peng* and Zhongfan Liu* Copper-containing carbon feedstock for growing superclean graphene. J. Am. Chem. Soc. 2019, 141, 7670.