Sentences with phrase «of nanodiamonds»

Schultz, professor of geological sciences at Brown and an impact specialist, said the most provocative evidence for an extraterrestrial impact was the discovery of nanodiamonds, microscopic bits of diamond formed only from the kind of intense pressure you'd get from a comet or meteorite slamming into the Earth.

Severe challenges are posed by the random orientation of the nanodiamonds and their nitrogen - vacancy centers.

One of the challenges is the random orientation of nanodiamonds in a solution which makes it difficult to achieve resonance with microwaves.

Together with adiabatic rotations of the external magnetic fields or rotations of the nanodiamonds leads to over 10,000-fold enhancement in the 13C polarization.

This opens a path for the application of our DNP technique to spins in and outside of nanodiamonds.

These parameters also helped researchers better characterize the nanodiamond - water interactions and tRNA dynamics in the presence of nanodiamonds.

To realize the potential of nanodiamonds in the delivery of biomolecules using tRNA as a model, the team turned to Titan to shed a much - needed light on the underlying physics.

The findings will likely guide future studies not only on the potential of nanodiamonds in drug delivery but also on fighting bacteria and treating viral diseases.

«The great properties of nanodiamond — lubricity, high thermal conductivity and electrical resistivity and stability, among others — are quite impressive,» said Taha - Tijerina.

Researchers have demonstrated how to control the «electron spin» of a nanodiamond while it is levitated with lasers in a vacuum, an advance that could find applications in quantum information processing, sensors and studies into the fundamental physics of quantum mechanics.

Not exact matches

That's at least 100 times larger than the nanodiamonds that form when planetary objects collide, and it's far larger than diamonds that form by condensing from carbon vapor inside clouds of interplanetary gas and dust.

In addition to the lack of any impact craters determined to have occurred around that time anywhere in the world, the radiocarbon dates of the layer of carbon, soot, charcoal, nanodiamonds, microspherules and iridium, asserted to have been the result of this catastrophic event, vary widely before and after the megafaunal extinction, anywhere from 14,000 to 10,000 years ago.

Yury Gogotsi, PhD, Distinguished University and Bach professor in the College of Engineering, and his research team from the Department of Materials Science and Engineering, recently published their work — entitled «Nanodiamonds Suppress Growth of Lithium Dendrites» — in the journal Nature Communications.

The stone's noble gas content supports an extraterrestrial origin, while the presence of tiny diamonds — larger than nanodiamonds found in a common kind of meteorite called chondrites, but similar in size to diamond aggregates known to be formed by impacts — supports a cometary origin.

Adding nanodiamonds to the mix is kind of like using a cheat code that slides each new block into the proper place to complete a line and prevent a menacing tower from forming.

Nanodiamonds have been used in the electroplating industry for some time as a way of making metal coatings more uniform.

Drexel researchers have reported that adding nanodiamonds to the electrolyte solution in lithium batteries can prevent the formation of dendrites, the tendril - like deposits of ions that can grow inside a battery over time and cause hazardous malfunctions.

In it, they describe a process by which nanodiamonds — tiny diamond particles 10,000 times smaller than the diameter of a hair — curtail the electrochemical deposition, called plating, that can lead to hazardous short - circuiting of lithium ion batteries.

They report in the paper that mixing nanodiamonds into the electrolyte solution of a lithium ion battery slows dendrite formation to nil through 100 charge - discharge cycles.

Since RNA is hydrophilic, or «likes water,» the molecules on the nanodiamond surface swell with excess hydration and weaken the heterogeneous dynamics of the molecules.

By comparing the SNS neutron scattering data with the data from the team's molecular dynamics simulations on Titan, the researchers have confirmed that nanodiamonds enhance the dynamics of tRNA when in the presence of water.

In a series of papers, Firestone and his colleagues claimed various kinds of evidence for the hypothesis, including deposits of the element iridium (rare on Earth but abundant in meteorites), microscopic diamonds (called nanodiamonds), and magnetic particles in deposits at sites supposedly dated to about 12,800 years ago.

And because their surfaces can be easily tailored to facilitate the attachment of various medicinal molecules, nanodiamonds have tremendous potential for the delivery of a vast range of therapies.

«Radiocarbon dating is a perilous process,» he contends, adding that the presence of Clovis artifacts and mammoth bones just under the claimed iridium, nanodiamond, and magnetic sphere deposits is a more reliable indicator that an extraterrestrial event was responsible for their disappearance.

«Diamonds that deliver: Neutrons, simulation analysis of tRNA - nanodiamond combo could transform drug delivery design principles.»

In tests, the researchers dispersed nanodiamonds in mineral oil and found that a very small concentration — one - tenth of a percent by weight — raised the thermal conductivity of the oil by 70 percent at 373 kelvins (about 211 degrees Fahrenheit).

Levitating the nanodiamonds in a vacuum enables precise control and rigorous measurement of the floating particles.

This is a schematic of an optical tweezer used in a vacuum chamber by Purdue University researchers, who controlled the «electron spin» of a levitated nanodiamond.

«We've shown how to continuously flip the electron spin in a nanodiamond levitated in a vacuum and in the presence of different gases,» said Tongcang Li, an assistant professor of physics and astronomy and electrical and computer engineering at Purdue University.

The technique exploits quantum effects in tiny diamond crystals, or «nanodiamonds», to detect changes down to a few thousandths of a degree.

The nanodiamond thermometers also have potential uses in chemistry to monitor how heat flows affect chemical reactions, especially at the interface between two substances, says David Awschalom, a physicist at the University of California in Santa Barbara, who led one of the earlier studies demonstrating diamond - based thermometry.

«Nanodiamonds are versatile platforms,» said Ho, who is also professor of bioengineering and a member of the Jonsson Comprehensive Cancer Center and the California NanoSystems Institute.

In the experiment, they could see that nearly every carbon atom of the original plastic was incorporated into «nanodiamonds» — small diamond structures up to a few nanometers wide.

Nanophase Carbon Materials (carbon nanotubes, nanodiamond, nanocomposite]-- A form of matter in which small clusters of atoms form the building blocks of a larger structure.

This result gives rise to the possibility of using nanodiamonds, suitably treated to attach themselves to targets that we would like to detect, as MRI markers for molecular imaging applications.

Los Alamos, New Mexico, Nov. 6, 2017 — For the first time in the U.S., time - resolved small - angle x-ray scattering (TRSAXS) is used to observe ultra-fast carbon clustering and graphite and nanodiamond production in the insensitive explosive Plastic Bonded Explosive (PBX) 9502, potentially leading to better computer models of explosive performance.

This high levels of hyperpolarization, together with the long nuclear - spin polarization lifetimes in nanodiamonds and the relatively high density of 13C nuclei, turn functionalized and hyperpolarized nanodiamonds into attractive MRI probes for molecular imaging both in vitro and in vivo.

«We developed a unique nanomechanical approach to precisely control and quantify the ultralarge elastic strain distributed in the nanodiamond samples,» said Yang Lu, associate professor at Chinese University of Hong Kong (CUHK).

United Kingdom About Blog The international and interdisciplinary forum, Fullerenes, Nanotubes, and Carbon Nanostructures, aims at publishing peer - reviewed research of original work in all areas of CARBON research including fullerenes, nanotubes, nanodiamond, graphene, any type of carbon nanostructure and any work dealing with carbon and carbon - related topics.

People including the scientists got way ahead of their evidence, which was black mats and nanodiamonds.

According to Richard Kerr's news item that accompanies the article in Science, at least some experts are skeptical that Kennett and others have really found nanodiamonds, or that, even if they have, they are necessarily evidence of an impact.