Gang Sun, University of California - Davis (image) University of California - Davis Share Print E-Mail Caption UC Davis Professor Gang Sun inspects a sample of his self-cleaning cotton. The fabric is chemically treated to remove stains and contaminants when exposed to light. Credit Andy Fell/UC Davis Usage Restrictions May be used with acknowledgement of the source. 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.