Fig. 5
From: Raman Spectra and Bulk Modulus of Nanodiamond in a Size Interval of 2–5 nm
a Raman spectra of the 2–5-nm nanodiamond-NaCl nanocomposite before and after pressure treatment and at a 50 GPa pressure. Excitation wavelength is 458 nm. The absence of the band with ω 0 = 1325 cm−1 under pressure of 50 GPa is possible only for a case when the bulk modulus of the 2–5-nm nanodiamond exceeds 524 GPa. (b) Pressure induced shift of the 1600 cm−1 Raman band; one halfwidth and intensity do not change under pressure