No comprehensive study has yet been carried out to characterize the photoexcited lattice dynamics of an opaque thin film on a semi-infinite transparent substrate. As a result, ultrafast X-ray diffraction data for such samples can be challenging to interpret. Now a new study builds a model to help interpret such data.
MIT chemists have developed new nanoparticles that can simultaneously perform magnetic resonance imaging (MRI) and fluorescent imaging in living animals. Such particles could help scientists to track specific molecules produced in the body, monitor a tumor's environment, or determine whether drugs have successfully reached their targets.
Imagine building a chemical reactor small enough to study nanoparticles a billionth of a meter across. A billion times smaller than a raindrop is the volume of an E. coli cell. And another million times smaller would be a reactor small enough to study isolated nanoparticles. Add to that the challenge of making not just one of these tiny reactors, but billions of them, all identical in size and shape. Researchers at Cornell have done just that.
Silicon is the second most-abundant element in the earth's crust. When purified, it takes on a diamond structure, which is essential to modern electronic devices - carbon is to biology as silicon is to technology. A team of scientists has synthesized an entirely new form of silicon, one that promises even greater future applications.
A team of physicists has developed a method to control the movements occurring within magnetic materials, which are used to store and carry information. The breakthrough could simultaneously bolster information processing while reducing the energy necessary to do so.
For the first time, scientists have vividly mapped the shapes and textures of high-order modes of Brownian motions - in this case, the collective macroscopic movement of molecules in microdisk resonators.
Topological insulators are promising to develop into a material for lossless electricity and information transport. Now, researchers investigated for the first time whether the direction of motion of electrons in topological insulators affects their behavior.
A research team reports that it has discovered an entirely new form of crystalline order that simultaneously exhibits both crystal and polycrystalline properties and holds promise for improving the efficiency of thermoelectric devices.