quadrupole

That is why the team made use of the molecule's electric quadrupole moment.

While fairly simple in design, a typical stainless-steel quadrupole might weigh several kilograms.

Since the 3D printer can form practically any shape, the researchers designed a quadrupole with hyperbolic rods.

In the future, the researchers plan to boost the quadrupole's performance by making the filters longer.

To finish the quadrupole, the researchers used a technique called electroless plating to coat the rods with a thin metal film, which makes them electrically conductive.