Pyramid-Shaped Building Blocks (IMAGE) Brown University Caption In research that may help bridge the divide between the nano and the macro, Brown University chemists have used pyramid-shaped nanoparticles to create what might be the most complex macroscale superstructure ever assembled. Brown chemist Ou Chen holds a mock-up of one of his quantum dot building blocks. Credit Brown University Usage Restrictions None License Licensed content 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.