The solvothermal method is a chemical synthesis technique used to produce materials, particularly nanomaterials and crystals, by dissolving precursors in a solvent under high temperature and pressure. This method allows for better control over the reaction environment, leading to the formation of uniform and high-quality products. In this process, the solvent, often an organic liquid, acts as both a medium for the reaction and a means to dissolve the reactants. The high temperature and pressure facilitate the reaction, promoting the growth of desired structures, such as nanoparticles or metal-organic frameworks.