Nanodevices is an academic concept and research field centered on the design, fabrication, and application of functional structures and systems operating at the nanoscale (typically 1-100 nanometers). This field investigates the unique physical, chemical, and biological phenomena that emerge at this scale, where quantum mechanical effects and surface properties often dominate device behavior. Key characteristics include extreme miniaturization, high integration density, and the exploitation of novel nanoscale phenomena to achieve superior performance or entirely new functionalities. The significance of nanodevices lies in their potential to revolutionize numerous technological sectors, including computing, medicine, environmental science, and energy, by enabling the creation of devices with unprecedented capabilities and efficiency.