W. Andy Tao, Purdue University (IMAGE) Purdue University Caption W. Andy Tao uses nanopolymers and chemical reactions that cause color-changes in a solution to detect activity related to cancer cell formation. Credit Purdue Agricultural Communication photo/Tom Campbell 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.