COFs (IMAGE) Rice University Caption COFs are a class of crystalline polymers whose tunable molecular structure, large surface area and porosity could be useful in energy applications, semiconductor devices, sensors, filtration systems and drug delivery. Credit (Photo by Gustavo Raskosky/Rice University) Usage Restrictions Must credit Gustavo Raskosky/Rice University. License Original 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.