date:Mar 26, 2014
overgrowth on gold nanorods. Metallic nanostructures can impart very intense colours, which are affected by their chemical composition, size and shape, Zhang stated.
The gold nanorods we used here are red in colour. During the reaction, silver is deposited on their surface, changing their composition, size and shape. As the silver layer thickens, the tag evolves from the initial red colour to orange, yellow, green, and even blue and violet, he added.
We found simple methods to control the ki