Superstructure (image) Brown University Share Print E-Mail Caption This is a magnified image of a superstructure built from nanoscale tetrahedral building blocks. The blocks' edges are each about nine nanometers in length. The superstructures built from them are between 200 and 300 micrometers across. Credit Chen Lab/Brown University Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.