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<p>Visualization of a bacterial cell (top) converting the chemical energy of organic molecules to electrons that are transferred to an inorganic tin oxide catalyst (bottom) via molecular wires embedded in an ultrathin silica layer (middle). The proton conducting silica membrane separates the chemically incompatible biological and inorganic environments thereby enabling electronic coupling of the catalysts on the shortest possible length scale, which is key to biohybrid performance and scalability. (Credit: Zosia Rostomian/Berkeley Lab)</p>

Separate But Together: Ultrathin Membrane Both Isolates and Couples Living and Non-Living Catalysts

Bioelectrochemical systems combine the best of both worlds – microbial cells with inorganic materials – to make fuels and other energy-rich chemicals with unrivaled efficiency. Yet technical difficulties have kept them impractical anywhere but in a lab. Now researchers at Lawrence Berkeley National Laboratory have developed a novel nanoscale membrane that could address these issues and pave the way for commercial scale-up.