Max Robotics — Global Service Robot Directory + US Certification

About

John Greenman is a pioneering researcher at the intersection of robotics, microbiology, and autonomous systems, best known for his groundbreaking work on energetically autonomous robots powered by Microbial Fuel Cells (MFCs). With over 550 citations across his most influential works, Greenman has fundamentally advanced the concept of artificial metabolism — the idea that robots can sustain themselves by harvesting energy from their environment much as living organisms do. His EcoBot series stands as a landmark achievement in the field. EcoBot-II demonstrated primitive artificial symbiosis using bacterial cultures from sewage sludge to generate onboard power, while EcoBot-III pushed boundaries further by incorporating an artificial digestion system capable of collecting and processing food from the environment. His 2007 work on "artificial gills" extended this vision to underwater robotics, exploring MFCs that harness dissolved oxygen for submarine autonomous vehicles. Greenman's theoretical contributions, including early papers on artificial metabolism and energy autonomy published in 2003, laid conceptual foundations that the broader field continues to build upon. More recently, his exploration of biodegradable MFCs reflects a commitment to sustainable, environmentally conscious engineering. His body of work inspires researchers pursuing truly self-sufficient, biologically inspired machines.