Molecular sieve (IMAGE) Ruhr-University Bochum Caption Two-dimensional silica has pores that are permeable to certain molecules (right), but not to others (left). It therefore acts like a sieve for molecules. Credit RUB, AG Chemie Anorganischer Materialien Usage Restrictions The image may only be used for reporting about Ruhr-Universität Bochum in the context of the press release "A sieve for molecules", published in March 2022. 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.