Self-cleaning Test of Nanoglass (IMAGE) National Research Council of Science & Technology Caption Comparison of water flow of typical glass and self-cleaning glass made from chitosan nanoparticles based fabrication. When water is dropped, water droplets show at a contact angle of 23 degrees on typical glass, but roll off the self-cleaning glass with a larger contact angle of 152 degrees. Credit Korea Institute of Machinery and Materials (KIMM) Usage Restrictions The sources of photos and research results from KIMM must be specified. 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.