A nanometer is one billionth of a meter, 20 times larger than a hydrogen atom. Electron microscopes can probe the 1-nanometer scale, with a resolution of 0.05 nanometers. Bacteria range from 300 to 5,000 nanometers, while viruses and other entities are smaller. Eukaryotic cells are about 5,000 to 100,000 nanometers in diameter. Nanoscience and nanotechnology […]