Geobacter Pili and Nanowire Network (IMAGE) University of Massachusetts Amherst Caption A transmission electron micrograph of Geobacter sulfurreducens cells synthesizing a network of protein nanofilaments which exhibit metallic-like conductivity. Credit Geobacter photo by Anna Klimes and Ernie Carbone, UMass Amherst Usage Restrictions None License Licensed content 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.