Some of the antibodies are attached to the free-floating channels.

ECONOMIST: Medical diagnostics

If a molecule of the type the sensor is designed to detect sticks to one of these anchored antibodies, it can also stick to an antibody on one of the free-floating outer channels.

ECONOMIST: Medical diagnostics

The number of channel molecules present means that, in normal circumstances, about 70% of the free-floating outer channels are lined up with tethered inner ones at any given time, with each dual channel letting through about 1m sodium ions per second.

ECONOMIST: Medical diagnostics

Reverse-image TVs that let you watch your favorite show in the bathroom mirror while lounging in the tub and flipping channels via a waterproof, floating remote.

WSJ: Jeffery Deaver on Bathrooms Around the World | Traveler's Tale