Chemistry -- Accelerating Gas Separation (IMAGE) DOE/Oak Ridge National Laboratory Caption Scientists synthesized porous hollow carbon spheres (HCS, shown in pink), incorporated them in a triblock copolymer (PS-PEB-PS, two blocks of polystyrene flanking a block of poly[ethylene-ran-butylene]) matrix and spin cast the mixture to create a robust membrane with improved permeability and selectivity for smaller carbon dioxide molecules (red and white) compared to larger nitrogen molecules (blue). Credit Oak Ridge National Laboratory/Dept. of Energy Usage Restrictions None 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.