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. 2018 Jan 25;8:1603. doi: 10.1038/s41598-017-16703-9

Figure 1.

Figure 1

Characterization of ND: TEM images of (A) as-received ND, (B) –COOH and (C) –NH2 modified nanodiamonds. (D) Powder X-ray diffraction patterns of as-received ND in comparison with –COOH and –NH2 functional groups modified ND powders. The reflecting atomic planes of the diamond structure are denoted by Miller indices. (E) Raman spectra of (a) as-received ND, (b) –COOH and (c) –NH2 modified nanodiamonds.