Glass windows coated by gold pigments in churches
Nanoparticles are described as particles lost its three dimensions or reduced three dimensions in the range of nanometers. These particles have different characters than their source material. For example, Titanium is a metal when changing it to Nano size it becomes as a Semiconductor.
We all know about the magic trick changing a normal metal to gold, a lot of magicians do this kind of magic to become popular. The changing material one to another by simply heat that material. Heating made the material change its property.
- At 525 degree Celsius, the colour of the object is red
- At 900 degree Celsius, the colour of the object is cherry red
- At 1200 degree Celsius, the colour of the object is orange-red
- At 1600 degree Celsius, the colour of the object is White.
Using this method the Gold material heat in high temperature the material changes its colour. These coloured materials used to paint on the windows. The best painting in the Catholic churches in Paris done paintings by using this method.