Various Allotropes of Diamond Nanoparticles Generated in the Gas Phase during Hot Filament Chemical Vapor Deposition

Round 1

Reviewer 1 Report

The main part of the work presents the results of measurements made on the HRTEM. The work is done solidly and methodically.
Personally, I have a remark about the description of Figure 4. What do the authors say <frequency> means in the drawing description and also in the text? Is it the number of nanoparticles (in 100 measurements) with the dominant lattice constant distance <d> (I don't know why it is marked with a capital letter <D> in Fig. 4). In this case, the word frequency would be replaced with the word number of particles, the description in Fig. 4 should also be changed so that it was methodically similar to the description in Fig. 6.

In the first paragraph of point 3.4, in the description, should be replaced the number of Fig. 6 on Fig. 7 (in several places).

Author Response

Please see the attachment

Author Response File: Author Response.pdf

Reviewer 2 Report

The synthesis of non-agglomerated nanodiamonds has been realized by hot-filament CVD(HFCVD) and it leads to great potential for various applications such as medical diagnostics and quantum technologies. In this manuscript, the authors thoughtfully analysed the crystal structure of non-agglomerated nanodiamonds by sophisticated TEM measurement. Furthermore, they provide fairly convincing statistics with around 600 TEM observations which is really plausible. The crystal structure of nanodiamond is highly affected by the growth condition of HFCVD and various structures including cubic diamond, n-diamond, hexagonal diamond and i-carbon are clearly identified. Overall, I believe this work has worthy to be published in a high-impact journal and could be highly cited, thus I recommend it to be published in nanomaterials with the current form.

Author Response

Thank you for the favorable comment.