Silicon Spicule (IMAGE) University of Chicago Caption This 3-D silicon mesostructure measures approximately 200 nanometers (the size of a small bacterium) across its narrow dimension. It is designed for integration with biological systems. The mesoscale is intermediate between the nanometer and macroscopic scales. Credit Bozhi Tian Group Usage Restrictions News organizations may use this image in connection with reports about the research of Bozhi Tian and his associates. 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.