The nanoparticles offered by Torskal are produced by green chemistry (by bio-reduction of metal salts HAuCl4), with crude and / or purified extracts from plants. These extracts have the double action of reducing the metal and stabilizing the nanoparticle formed. The size and shape of the nanoparticles formed can be modulated by various factors during the synthesis.
Eco-friendly and cost-effective procedures for the synthesis of nanoparticles represent interesting topics for biologists, chemists and materials scientists, because of the high demand to produce clean, nontoxic chemicals, environmentally benign solvents, and renewable materials. The oxidant / reducing ratio, the pH of the reaction medium, the reaction time are all factors that can influence the final compound. Synthetic optimization work has been carried out by Torskal to increase the yield and understand the formation of nanoparticles.