Turn color into gold

A team of experts in the UK creates blue, red, green ingots by changing the way they absorb and reflect the light of the metal.

Professor Nikolay Zheludev, a specialist in metamaterials and photonics at the University of Southampton in England, and his colleagues have come up with the idea of changing the color of gold by changing the absorption and reflection mechanisms of light. it. To achieve that goal, they embossed or engulfed structures up to 100 nanometers in length on the surface of gold, the BBC reported.

The technique of Professor Nikolay Zheludev can help people
Create red, green, and other colored ingots.

'The new technique allows us to create red, green, or other colored ingots. We can do the same with other metals, like silver or aluminum, ' Zheludev said.

The shape, height and depth of the nanostructures will determine the mechanism for absorbing or reflecting the light of the metal. Each mechanism will create a separate color.

'This is the first time the color of metal has changed by this. The way an object interacts with light produces the colors of things we see everyday. For example, when the eyes see a light reflecting red light but absorbing other light, we will see it as a red object , Zheludev explained.

Researchers say they are trying to market new technology to jewelry companies, as it can be used in jewelery making. Zheludev believes that his technique can also be applied to the production of money and confidential documents, as it will create traits that are virtually impossible to counterfeit.