High-Quality Green-Emitting Nanodiamonds Fabricated by HPHT Sintering of Polycrystalline Shockwave Diamonds

Table 1 The FWHM of the diamond Raman line (at 1331.4 cm⁻¹) for some selected fractions of bead-milled synthetic monocrystalline Ib HPHT diamonds with variable median size

Mean size of selected diamond powder fraction, nm	25	75	100	180	≥ 1000
Raman linewidth^a, cm⁻¹	9.12	7.98	7.23	7.05	5.24

^aThe linewidths are not corrected from the Raman spectrometer resolution of about 2 cm⁻¹