Bismuth Sulfide (Bi2S3) Nanoparticles
Bismuth sulfide (Bi2S3) nanoparticles are classified as crystalline non-toxic semiconductors used in optical and electronic devices, hybrid bilk nano-heterojunctions used in solar energy generation and conversion devices and sensitized solar cells. Bismuth sulfide nanoparticles have called a lot of attention due to their unique optoelectronic properties with a direct bandgap of 1.3 eV making them useful agents as thermo electronic devices, nonlinear absorption, biomolecule detection, photovoltaic materials, photodiode array and infrared spectroscopy. Bismuth sulfide nanoparticles go in different allotropic forms as nanorods, nanowires and nanoflowers synthesized based on methods such as precipitation, microwave radiation and hydrothermal method. They can also be synthesized taking the advantage of physical and chemical techniques as nanocrystals by colloidal synthesis as well as green chemistry methods. In another method, bismuth sulfide nanoparticles can be obtained by precipitation by hydrogen sulfide from bismuth solution. Bismuth sulfide nanoparticles have also been employed as drug nanocarriers in pharmaceutics for poorly soluble drugs.