By suppressing the growth of the crystal faces with specific addition of an additive (e.g., anions, amines, carboxylic acids, surfactants, etc.), the shape and size of the nanoparticles can be controlled. This effect occurs because of the selectivity of adsorption on a specific face, leading to structures with high symmetry . The localized nature of this OA mechanism, often in the early stages of nucleation, leads to the formation of irregular and anisotropic nanocrystals (e.g., nanorods, nanodumbells, nanowires) . Grain growth can also occur through the coalescence of crystals with a similar crystallographic orientation. This process is called the coalescence mechanism, where the driving force reduces the surface area or contours (see Figure ). Among the modes of mass transport observed during coalescence, surface diffusion stands out . Thus, the mechanism begins with contact between the particles. This mechanism begins with contact between the particles, which leads to their reorientation. As the system behaves as a single body, the growth rate slows, resulting in an oblong, ovoid, or dumbbell shape . This naturally enables the formation of complex defects, most likely due to rapid reorientation of the clusters among a significant number of newly formed bonds that block the rotational movement of such particles. One other notable characteristic of disordered structures is that they may also alter the crystal nucleation and growth processes . Hence, from this perspective, the control of these crystal features is achieved by suppressing the growth of the crystal face by selectively adsorbing an additive to a specific face . In addition, the suppression of the aggregation of nuclei can also be controlled by adding a dispersant/thickener or by controlling the pH of the solution. During synthesis, the chemical potential of the ions dispersed in a solvent affects the solubility of the precursors .