Ultra-precise “POMbranes” sieve out larger molecules (red) while allowing only 1-nanometer-sized species (green) to pass through their pores, enabling sharp molecular sorting. Credit: Central Salt and Marine Chemical Research Institute, Gujarat, India A team of researchers from the CSIR-Central Salt and Marine Chemicals Research Institute (CSMCRI), the Indian Institute of Technology Gandhinagar (IITGN), Nanyang Technological University in Singapore, and the S N Bose National Centre for Basic