Nanotechnology involves controlling and modifying matter at the atomic and molecular scales, between 1 to 100 nanometers. It can make materials lighter, stronger, smaller, and more durable. Nanotechnology spans many areas including biotechnology, information technology, medicine, energy, and more. Some current applications include atomic-level simulations, new catalysts, solar cells, and tissue regeneration. Future applications may include molecular circuitry, quantum computing, and fast chemical analysis.