<p>This work focuses on the analytical and numerical exploration of the contrast in the dynamic behavior of C60 fullerenes and nanodiamonds suspended in a liquid ethanol solution. A comprehensive study reveals different sedimentation times related to the structure of the samples; demonstrating that it is possible to achieve a selective structural separation of carbon nanoparticles of the same size. One of the main goals was to find numerical solutions regarding the dynamic properties exhibited by nanodiamonds. However, due to the random behavior of nanoparticles, it was necessary to generate a set of random measurements to generate the parameters required for the study of this type of systems. The maximum precipitation values ​​were estimated for a set of nanoparticles encapsulated in liposomes. The results showed that there is a direct influence of internal forces on the sedimentation process, showing that the gravitational force is not strong enough to cause the suspended nanoparticles to constantly settle. This limit was determined by taking the external force of gravity and the internal forces related to the buoyancy force and friction. Finally, in order to strengthen our research, a comparative study of the Brownian behavior of a nanofluid composed of nanodiamonds and C60 fullerenes under light illumination is evaluated, allowing us to obtain a general selective method to separate two types of nanoparticles of different geometry and size, but with different densities. This research can be a base to estimate the behavior associated with the transport of nanoparticles, generating a simple and effective method for the selective separation of nanoparticles in a liquid medium.</p>