Silicon Nitride Nanopore Translocation (image) University of Pennsylvania Caption This is an illustration of a single-stranded DNA homopolymer translocating through a silicon nitride nanopore. The thickness of the membrane tapers within the nanopore, enhancing its sensitivity. Credit University of Pennsylvania Usage Restrictions With credit. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.