A promising lead halide perovskite is great at converting sunlight to electricity, but it breaks down at room temperature. Now scientists have discovered how to stabilize it with pressure from a diamond anvil cell.
“I think the mid-upper mantle would be gorgeous, because it would be olivine green, like 60 percent, and it would also have garnets, these beautiful red cubic minerals,” says Stanford mineral physicist Wendy Mao.
As part an effort to celebrate and discuss identity, even diversity within broad categories such as Asian American, four Stanford Earth members share how their ethnic-cultural backgrounds have informed and impacted their careers.
Scientists are still trying to piece together how Earth transformed from a molten planet to one with living creatures walking around on its silicate mantle and crust. Hints lie in the strange ways materials behave under extreme temperatures and pressures.
Wendy Mao edited a new book on the physical and chemical properties of deep carbon, and "we have still only barely scratched the surface in terms of understanding carbon in planetary interiors,” she says.
A flash of green laser followed by pulses of X-rays, and mere nanoseconds later an extraterrestrial form of ice has formed. The miniature crystal reveals how water solidifies under high pressures, like those expected in icy comets, moons and planets.