Gold Rainbow

We have been trying to make various colors out of nano-metal powders and we are almost there to make colors representing the full spectrum of rainbow. Attached please see the photo of our products. As you know, this is due to the phenomenon often referred to as “Plasmon absorption”, which is due to different degree of absorption of light based on size difference of metal powders. The size of these particles is about 5-20 nano-meters, which is about one five-thousandth of the diameter of your hair. (The diameter of human hair is about 20-200 microns.) A photo of this is attached for your review and also attached are a couple of photos of a side of our university, of which view I have been admiring so deeply. This is the view I see every morning when I come to school.