Nanoparticles: Used in drug delivery, imaging, and as catalysts. Nanowires: Applied in electronics, sensors, and energy storage. Nanotubes: Known for their strength and electrical conductivity, used in materials science and electronics. Quantum Dots: Semiconductor particles that have quantum mechanical properties, used in displays and medical imaging. Nanocomposites: Materials that combine nanoparticles with bulk materials to enhance performance.