Designing selective sponges (IMAGE) DOE/Sandia National Laboratories Caption Sandia National Laboratories geochemist Anastasia Ilgen works on a vapor sorption analyzer used for characterizing the chemistry of porous solids such as metal-organic frameworks. Ilgen and her team designed MOFs for selectively purifying rare-earth elements. Credit Photo by Craig Fritz/Sandia National Laboratories Usage Restrictions Non-commercial and news usage with credit 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.