Coulomb blockade is a phenomenon in which the flow of electrons through a nanostructure, such as a quantum dot or a single-electron transistor, is restricted due to the electrostatic repulsion between ...

is a measure of energy, per unit of charge, transferred between two points in a circuit. A potential difference of 1 volt means that 1 joule of work is done per coulomb of charge.

Since you're paying the same amount for vastly different amounts of energy, no one can accuse Coulomb of selling the energy. Instead, they're selling access to the energy. Clever, no? Read on past ...