Tag: materials

Sci&Tech

Physicists Have Caught Electron Orbits in an Exciton Quasiparticle For The First Time

There's been a fabulous new achievement in particle physics.For the first time, scientists have managed to image the orbits of electrons within a quasiparticle known as an exciton - a result that has allowed them to finally measure the excitonic wave function describing the spatial distribution of electron momentum within the quasiparticle.  This achievement has been sought since the discovery of excitons in the 1930s, and while it may sound abstract at first, it could help in the development of various technologies, including quantum tech applications."Excitons are really unique and interesting particles; they are electrically neutral which means they behave very differently within materials from other particles like electrons. Their presence can really change the way a material responds...
Sci&Tech

World's Whitest Paint Reflects 98.1% of Light. It Could Help in The Climate Fight

A new formula for white paint has given us the whitest white yet. It reflects a jaw-dropping 98.1 percent of all light that hits it, remaining significantly cooler than the ambient temperature, even when sitting in full sunlight.  If used to coat buildings, its inventors say, the paint could help in the fight against global warming by reducing our reliance on electrically powered air conditioning, a habit that's worsening the climate crisis."If you were to use this paint to cover a roof area of about 1,000 square feet [92.9 square meters], we estimate that you could get a cooling power of 10 kilowatts," said mechanical engineer Xiulin Ruan of Purdue University."That's more powerful than the central air conditioners used by most houses."The team's work builds on paint they developed last y...
Sci&Tech

How Could Surface Minerals Get in Diamonds Found in The Deepest Depths of The Earth?

Diamonds that formed hundreds of kilometers deep below Earth's surface contain traces of chemical reactions that took place on the bottom of the ocean.Given that the bottom of the ocean is just 11 kilometers (6.8 miles) down at its deepest point, this may seem rather odd – but those diamonds are a really valuable clue for understanding the exchange of material between Earth's surface and its crushing depths, researchers say.  "Nearly all tectonic plates that make up the seafloor eventually bend and slide down into the mantle – a process called subduction, which has the potential to recycle surface materials, such as water, into the Earth," explained geologist Peng Ni of the Carnegie Institution for Science.Diamonds are prized for their beauty when shaped into faceted gems, but the little ...
Sci&Tech

Scientists Thrilled to Observe The First Milliseconds of Gold Crystal Formation

We now know how gold crystals start to form at the atomic scale.For the first time, scientists have observed – and filmed! – the first milliseconds of gold crystal formation and found that it's much more complicated than previous research suggested. Rather than a single, irreversible transition, the atoms come together and fall apart multiple times before stabilizing into a crystal.  This discovery has implications for both materials science and manufacturing, as it bolsters our understanding of how materials come together out of a messy pile of atoms."As scientists seek to control matter at smaller length scales to produce new materials and devices, this study helps us understand exactly how some crystals form," explained physicist Peter Ercius of the Lawrence Berkeley National Laborator...