Blue brain technology aims to create a synthetic brain using nanobots and supercomputing. It works by simulating neurons with silicon chips and artificial neurons. Nanobots are at the heart of the blue brain - they have mechanical arms, rotors, sensors and other parts to navigate, position, detect and complete tasks like a natural brain. The blue brain technology allows memory storage and processing without a physical brain, and has advantages like preserving intelligence after death but also disadvantages like high costs and potential misuse of knowledge.