Micron-sized diamond particles containing Ge-V and Si-V color centers
Zhang Hang-Cheng, Chen Cheng-Ke, Mei Ying-Shuang, Li Xiao, Jiang Mei-Yan, Hu Xiao-Jun
       

FESEM images of the diamond particles grown for (a) 45 min, (b) 60 min, (c) 75 min, (d) 90 min, (e) 105 min, and (f) 120 min under the pressure of 2.5 kPa.