Water: Widely used due to its non-toxicity and high polarity. Suitable for synthesizing hydrophilic nanoparticles. Ethanol: A polar solvent often used for stabilizing and dispersing nanoparticles. Toluene: A non-polar solvent ideal for synthesizing hydrophobic nanoparticles. Dimethyl sulfoxide (DMSO): Used for its ability to dissolve a wide range of substances. Acetone: Commonly used for its volatility and ability to evaporate quickly, leaving behind the synthesized nanoparticles.