Nanotechnology involves manipulating matter at the nanoscale to create new materials and devices. At the nanoscale of 1-100 nanometers, materials exhibit novel optical, mechanical, and electrical properties. Nanomedicine uses nanotechnology for drug delivery, diagnostics, and tissue engineering. Some benefits of nanomedicine include more targeted drug delivery to reduce side effects, multifunctional nanoparticles that can deliver drugs, target cells, and enable imaging, and potential uses like artificial blood cells. Challenges include interactions with the immune system, tracking nanoparticles in the body, and developing safe and effective medical nanorobots.

10. Nanomotors..... POTENT ENGINE. The ATPase motor is built on the membranes of cellular mitochondria. The force it generates in moving energy in cells places it among the most powerful of any known molecular motors. Researchers at Berkeley at the University of California created the world's smallest electrical device earlier this year - one hundred million of which could fit on the end of a pin.