At left, a scanning electron microscope image shows the mesoporous structure of molecular-imprinted graphitic carbon nitride nanosheets. At right, a transmission electron microscope image shows the sheet’s edge and its crystalline structure. Rice University researchers imprinted the nanosheets to catch and kill free-floating antibiotic resistant genes found in secondary effluent produced by wastewater plants. (Credit: Alvarez Research Group/Rice University)

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