The Nanomechanical Mass Sensor Can Weigh a Proton

A research team led by Professor Adrian Bachtoldat at the Catalan Institute of Nanotechnology has invented the tested the world's most sensitive scale. In fact, the scale is so sensitive that it can weigh a single proton.

The scale works by using sensors that must be lowered to -269 degrees Celsius before working. It must also be in an environment without noise which would distract it. The sensor is made of a 150 nanometre-long carbon nanotube and can tell when molecules are being absorbed. By being able to tell when a molecule is absorbed, the scale can measure the difference in weight.

This extremely sensitive scale could lead to further scientific developments in the fields of spectrometry, surface science and other related fields.