Nanopores in graphenemembranes can potentially offer unprecedented spatial resolution for single molecule sensing, but their fabrication has thus far been difficult, poorly scalable, and prone to contamination. We demonstrate an in-situfabrication method that nucleates and controllably enlarges nanopores in electrolyte solution by applying ultra-short, high-voltage pulses across the graphenemembrane. This method can be used to rapidly produce graphenenanopores with subnanometer size accuracy in an apparatus free of nanoscale beams or tips.
