| 1 | I' d be about as big as a virus, but nano is even smaller than that. | |
| 2 | We can actually watch in real-time as these nano-machines make themselves. | |
| 3 | To see anything smaller than 500 nm, you will need an electron microscope. | |
| 4 | However, the nanotubes were defective and not any better electrical and thermal conductors than copper. | |
| 5 | And it is completely unknown what impact a wide variety of these nanoparticles might have on human health. |