In the realm of nanotechnology, the term "drain" specifically refers to a critical component of nanoscale transistors, especially in field-effect transistors (FETs). These transistors are essential building blocks of modern electronic devices. The drain is one of the three terminals in a transistor, the other two being the source and the gate. The primary function of the drain is to collect the charge carriers (electrons or holes) that flow from the source under the influence of the gate voltage.
