Antimony tin oxide (ATO) is known as an alloy of tin oxide which is usually doped with antimony pentoxide. It exhibits significantly high conductivity with tin:antimony ratios being typically in a range of 80:20 to 95:5. Owing to their good electrical properties, antimony tin oxide has the ability to form nano particles which are further used in a wide variety of applications such as alloys and composites. ATO's morphology is spherical and appears in the form of blue powder, although their consumption can sometimes lead to serious skin and eye irritations. Some of the primary applications of antimony tin oxide include additives for plastics, electronic applications such as touch screen, textiles, and coatings, sunlight shielding, dispersing liquid for producing sunlight shielding solid as well as transparent substrate. The nano particles of these metal oxides possess several novel properties such as magnetic, optical and electrical from high surface to volume ratio and quantum size effect. These materials are applied across a broad range of applications in various high-tech technologies and industries owing to their exceptional optical and magnetic properties, which significantly depend on their shape, structure and size.