diamond anvil cell

Diamond is the hardest natural material and usually does not conduct electricity. But if you add a few foreign atoms to its crystal lattice, it can become a semiconductor, like silicon in computer chips.

Quartz microbalances are thin plates that vibrate at a frequency of five million times per second. When a drop of liquid lands on the plate, the vibration changes: from these changes, you can determine the drop's mass and its elasticity.

Diamond is the hardest natural material, and working with it usually feels like a sculptor using a jackhammer: rough, with cracks and chips. But electronics demands jeweler-like precision, because diamond conducts heat superbly, withstands high temperatures, and can work in quantum devices.

A laser beam passes through glass and touches a thin diamond film. At the point of contact, the film turns into a narrow strip that lifts slightly. We place a second strip next to it, and between them remains an empty corridor. That's the channel: its width can be fifty times its height, like a sheet of paper lying on a table.

Tiny diamonds with a defect inside can act as ultra-sensitive magnetic field sensors. But to be useful in medicine, they need to be carefully placed on soft, wet, curved surfaces, like a hydrogel bandage or a hair. It's like applying a temporary tattoo to a wet ball: the usual methods either burn the pattern or leave messy residues.

A weight about the size of a small apple hangs from a thread hundreds of times thinner than a human hair. The thread doesn't snap and barely interferes with the weight's swinging. This setup is the heart of a new lab scale for measuring gravitational attraction.

In a diamond anvil cell, pressure squeezes a material as if it were buried hundreds of kilometers deep inside the Earth. Inside this chamber, tiny diamond sensors, color centers, respond to microwaves and report on the magnetic fields and temperatures around them.

A cell doesn't just lie on a surface: it probes it, pulls it, and pushes it. Until now, instruments could only detect direct forces: how hard a cell presses or stretches its support. But if you grab a cell by the "shoulders" and give it a slight twist, it responds by rotating, and until recently, no one could measure that rotation.

Every hour, when the hands of a clock align at twelve, something happens in Earth's magnetosphere. It's as if an invisible conductor raises a baton, and waves race along magnetic field lines toward the surface. They're called pearls: on recordings, they look like a string of beads strung along time.

The most common type of planet in our Galaxy — rocky worlds around other stars, or exoplanets, shrouded in the simplest gas hydrogen. Their innards remained a mystery until scientists recreated the conditions of the interior in the lab.