David Sinton pioneered the area of microfluidics for energy applications, inventing (i) the microfluidic fuel cell with flow-through porous electrodes providing class-leading power densities, (ii) microfluidic methods to quantify transport and reactivity in CO2 sequestration and oil recovery, and (iii) the dense cultivation of photosynthetic biofilms on optical waveguides for bioenergy. He also solved long-standing biomedical challenges in transport to biosensors and the selection of sperm with high DNA integrity.