Polymer Nanobrush 'Turf' (IMAGE) Drexel University Caption Drexel materials scientist Christopher Li, Ph.D., reports a new way for making polymer nanobrushes that equates to growing a lawn by rolling out sod instead of planting seeds. Credit Drexel 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.