NASA says an international satellite studying the world's oceans has stopped working after four years. The space agency said Wednesday that the Argentine-built satellite ceased operations last week after a hardware failure. The satellite carried a NASA instrument called Aquarius that measured the concentration of dissolved salt at the sea surface.
In a study that could improve the safety of next-generation batteries, researchers discovered that adding two chemicals to the electrolyte of a lithium metal battery prevents the formation of dendrites—"fingers" of lithium that pierce the barrier between the battery's halves, causing it to short out, overheat and sometimes burst into flame.
Aalto Univ. researchers have succeeded to predict, in theory, that superconducting surfaces can become topological superconductors when magnetic iron atoms are deposited on the surface in a regular pattern. They used the latest mathematical and physical models to predict the existence of a topological superconducting state on metallic superconducting surfaces and thin films.
An international research group led by scientists at NIST’s Center for Nanoscale Science and Technology has developed a method for measuring crystal vibrations in graphene. Understanding these vibrations is a critical step toward controlling future technologies based on graphene.
Silk inks containing enzymes, antibiotics, antibodies, nanoparticles and growth factors could turn inkjet printing into a new, more effective tool for therapeutics, regenerative medicine and biosensing, according to new research led by Tufts Univ. biomedical engineers and published in Advanced Materials.
An international team of researchers has discovered traces of methane in Martian meteorites, a possible clue in the search for life on the Red Planet. The researchers examined samples from six meteorites of volcanic rock that originated on Mars. The meteorites contain gases in the same proportion and with the same isotopic composition as the Martian atmosphere.
Researchers have solved the long-standing conundrum of how the boundary between grains of graphene affects heat conductivity in thin films of the miracle substance, bringing developers a step closer to engineering films at a scale useful for cooling microelectronic devices and hundreds of other nanotech applications.
Astronomers have long theorized the existence of a first generation of stars that were born out of the primordial material from the Big Bang. All the heavier chemical elements were forged in the bellies of stars. This means that the first stars must have formed out of the only elements to exist prior to stars: hydrogen, helium and trace amounts of lithium.
Blink your eyes and it’s long gone. Carbonic acid exists for a tiny fraction of a second when carbon dioxide gas dissolves in water before changing into a mix of protons and bicarbonate anions. Despite its short life, carbonic acid imparts a lasting impact on Earth’s atmosphere and geology, as well as on the human body. However, because of its short lifespan, the detailed chemistry of carbonic acid has long been veiled in mystery.
A Purdue Univ.-led team of researchers studying the Middle East Respiratory Syndrome, or MERS, have found molecules that shut down the activity of an essential enzyme in the virus and could lead the way to better treatments for those infected.
A group of researchers at Chalmers Univ. of Technology have managed to print and dry 3-D objects made entirely by cellulose, for the first time, with the help of a 3-D bioprinter. They also added carbon nanotubes to create electrically conductive material.
Researchers from North Carolina State University have created stretchable, transparent conductors that work because of the structures’ “nano-accordion” design. The conductors could be used in a wide variety of applications, such as flexible electronics, stretchable displays or wearable sensors.
The matter that makes up distant planets and even-more-distant stars exists under extreme pressure and temperature. This matter includes members of a family of seven elements called noble gases. Scientists used laboratory techniques to mimic stellar and planetary conditions, and observe how noble gases behave under these conditions, in order to better understand the atmospheric and internal chemistry of these celestial objects.
ETH material engineers found the performance of ion-conducting ceramic membranes that are so important in industry depends largely on their strain and buckling profiles. For the first time, scientists can now selectively manipulate the buckling profile, and thus the physical properties, allowing new technical applications of these membranes.
An international team of physicists working at the Institute of Nuclear Physics at Johannes Gutenberg University Mainz has measured the mass of a "strange" atomic nucleus with the aid of an innovative technique that is capable of significantly greater precision than that of previous methods. The researchers were able, for the first time worldwide, to observe the radioactive decay of artificially generated nuclei of super-heavy hydrogen.