Mitigating the Thermal Bottleneck in Polycrystalline Diamond Films by Gradient ICP Etching of the Nucleation Layer. - Lv, Yuhan; Zhao, Lei; Wang, Xiangbing; Sheng, Zhanpeng; Zhang, Rongchen; Cui, Xuejian; Jiang, Nan; Yi, Jian; Huang, Jianhui (Materials (1996-1944), 2026)