Yaoyi Li, Shavani Rujput, Michael Weinert and Lian Li, University of Wisconsin Milwaukee (image) University of Wisconsin - Milwaukee Share Print E-Mail Caption Postdoctoral researcher Yaoyi Li holds an image taken with a Scanning Tunneling Microscope of the 'grain boundaries' on the topological insulator Bi2Se3. Other University of Wisconsin Milwaukee researchers on the paper include graduate student Shavani Rujput and physic professors Michael Weinert (back left) and Lian Li (back right). Credit Peter Jakubowski Usage Restrictions With credit. 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.