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A newly designed porous membrane, so thin it’s invisible edge-on, may revolutionize the way doctors and scientists manipulate objects as small as a molecule. The 50-atom-thick filter can withstand surprisingly high pressures and could be a key to better separation of blood proteins for dialysis patients, speeding ion exchange in fuel cells, creating a new environment for growing neurological stem cells, and purifying air and water in hospitals and clean rooms at the nanoscopic level.
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