Friction Control: New Method Halts Electronic Rubbing

A new technique allows for the control of "electronic friction," a phenomenon that causes energy loss within devices, even on perfectly smooth surfaces. This friction arises from interactions between electrons within materials. Scientists have devised a method using a layered device made of graphite and a semiconductor.

This device enables researchers to manage electronic friction by applying external pressure and bias voltage. These adjustments can effectively turn off the friction by altering how electrons interact. Researchers have found that changing the voltage can also serve as a dial to weaken electronic friction.

Previous studies date back to 1998, with researchers aiming for real-time, remote control over friction. While a comprehensive model for all friction types is still developing, this advancement holds promise for devices where electronic friction is a major factor in energy waste and wear.