Zhang’s lab is able to control the synthesis of the hollow gold nanospheres to produce particles with consistent size and optical properties. The hollow particles can be made in sizes ranging from 20 ...

Matthew Vaughn's sequel to 2015's Kingsman: The Secret Service tries to top the original, but falls short in Kingsman: The Golden Circle.

A spinning hollow circle is a great way to suggest the passing of time in a PowerPoint show. Susan Harkins shows you how to make this simple animation.