New device from MIT can measure masses as small as one millionth of a trillionth of a gram, in solution.
The illustration shows a suspended nanochannel resonator (SNR), which can directly measure the mass of individual nanoparticles with single-attogram precision. The inset shows a depiction from inside the embedded fluidic channel, while a DNA-origami gold nanoparticle assembly is passing through the resonator. Image courtesy of Selim Olcum and Nate Cermak.