If you develop sunscreen products, you probably know that conventional ZnO fine particles with a diameter of less than 0.1 μm are at a disadvantage in that transmitted light increases as particles become smaller. This, in turn, means UV protection in the UVA range (i.e., 315 nm to 380 nm) is significantly reduced.
Patent Pick: Putting a 'Hex' on UVA and Heat
Aug 3rd, 2016