Hexagonal boron nitride hollow capsules with collapsed surfaces: Chemical vapor deposition with single-source precursor ammonium fluoroborate
Li Xiaopeng1, Zhang Jun1, Yu Chao1, Liu Xiaoxi1, Abbas Saleem1, Li Jie1, Xue Yanming2, †, 
, Tang Chengchun1, ‡,
, Tang Chengchun1, ‡, Schematic diagram of the formation mechanism.
