Intermolecular forces, such as van der Waals forces, hydrogen bonding, and electrostatic interactions, play a significant role in nanosystems. These forces govern the self-assembly of nanoparticles, the stability of nanostructures, and the interactions between different components within a nanosystem. Mastery of these forces allows for the precise engineering of nanoscale materials and devices, leading to innovations in drug delivery, sensor technology, and beyond.