For size you can use TEM. I think that will be better then using any software

I don't think there is mature software that can handle such a large system, such as how large that nanoparticles can be. And the growth of nanoparticles is related to a lot of factors, it is too complicated, even if it is only limited to thermodynamically stable systems (only accounted for a small portions among numerous cases). However most nanoparticles are not so stable.

If what you mentioned is the method under study, you can refer to:

https://doi.org/10.1021/ja3087054

https://doi.org/10.1021/ar3002427

https://doi.org/10.1021/cm3031279

https://doi.org/10.1016/j.jechem.2018.03.023

hope someone correct me.

All these softwares requires information about the structure of the NPs. What are your inputs ? I mean the information that you have on these NPs .

For size you can use TEM. I think that will be better then using any software

Hi Mr. Shedrck Akpe

Please see these articles and I hope that they will be useful.

Modeling nanomaterial physical properties: theory and simulation

https://www.researchgate.net/post/Can_anyone_suggest_me_that_which_a_good_software_for_simulations_of_light_scattering_through_a_nanoparticle_in_the_sample

https://www.researchgate.net/post/Nanoparticle_size_distribution_analysis_software_for_TEM_micrographs2

ImageJ analysis software {docs.google.com}

https://imagej.net/Particle_Analysis

https://www.microscopy.ethz.ch/downloads/particle-size.pdf

https://imagej.nih.gov/ij/download.html

Gangli Zhu Kolattukudy P. Santo Muhammad Ismail Saeideh Hosseini So sorry for the late reply. I am so much grateful to you all for your kind response.