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Archive for the ‘materials’ category: Page 277

Apr 18, 2016

Scientists have finally made a substance that’s even stronger than graphene

Posted by in categories: entertainment, materials

Much like in comic books, scientists are on an endless quest to discover or create the strongest, most durable substance possible. Theories about how to go about that have long circulated, but nobody has been able to overcome the challenge—until now. A team of Austrian researchers has finally worked out a way to stabilize what they are calling the strongest of all known materials, an exotic form of carbon called carbyne.

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Apr 15, 2016

Graphene is both transparent and opaque to radiation

Posted by in categories: internet, materials

A microchip that filters out unwanted radiation with the help of graphene has been developed by scientists from the EPFL and tested by researchers of the University of Geneva (UNIGE). The invention could be used in future devices to transmit wireless data ten times faster.

EPFL and UNIGE scientists have developed a using graphene that could help wireless telecommunications share data at a rate that is ten times faster than currently possible. The results are published today in Nature Communications.

“Our graphene based microchip is an essential building block for faster wireless telecommunications in frequency bands that current mobile devices cannot access,” says EPFL scientist Michele Tamagnone.

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Apr 14, 2016

Carbyne: Scientists create ‘holy grail’ strongest material in the world that’s tougher than graphene

Posted by in category: materials

Elusive ‘wonder material’ takes graphene’s title as the strongest substance ever made.

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Apr 13, 2016

Turning water to steam, no boiling required

Posted by in category: materials

A new material can convert water into steam with sunlight alone, and could be useful for making fresh water from salty.

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Apr 12, 2016

Inertia as a zero-point-field Lorentz force

Posted by in categories: materials, particle physics

Older, but interesting…


Under the hypothesis that ordinary matter is ultimately made of subelementary constitutive primary charged entities or ‘‘partons’’ bound in the manner of traditional elementary Planck oscillators (a time-honored classical technique), it is shown that a heretofore uninvestigated Lorentz force (specifically, the magnetic component of the Lorentz force) arises in any accelerated reference frame from the interaction of the partons with the vacuum electromagnetic zero-point field (ZPF). Partons, though asymptotically free at the highest frequencies, are endowed with a sufficiently large ‘‘bare mass’’ to allow interactions with the ZPF at very high frequencies up to the Planck frequencies. This Lorentz force, though originating at the subelementary parton level, appears to produce an opposition to the acceleration of material objects at a macroscopic level having the correct characteristics to account for the property of inertia. We thus propose the interpretation that inertia is an electromagnetic resistance arising from the known spectral distortion of the ZPF in accelerated frames. The proposed concept also suggests a physically rigorous version of Mach’s principle. Moreover, some preliminary independent corroboration is suggested for ideas proposed by Sakharov (Dokl. Akad. Nauk SSSR 177, 70 (1968) [Sov. Phys. Dokl. 12, 1040 (1968)]) and further explored by one of us [H. E. Puthoff, Phys. Rev. A 39, 2333 (1989)] concerning a ZPF-based model of Newtonian gravity, and for the equivalence of inertial and gravitational mass as dictated by the principle of equivalence.

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Apr 10, 2016

Flat boron is a superconductor

Posted by in category: materials

Rice University scientists have determined that two-dimensional boron is a natural low-temperature superconductor. In fact, it may be the only 2-D material with such potential.

Rice theoretical physicist Boris Yakobson and his co-workers published their calculations that show atomically flat boron is metallic and will transmit electrons with no resistance. The work appears this month in the American Chemical Society journal Nano Letters.

The hitch, as with most superconducting materials, is that it loses its resistivity only when very cold, in this case between 10 and 20 kelvins (roughly, minus-430 degrees Fahrenheit). But for making very small superconducting circuits, it might be the only game in town.

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Apr 9, 2016

Nanoporous Material Displays Odd “Breathing” Habit

Posted by in categories: biotech/medical, materials

Simulation of DUT-49 atom arrangement when it has not contracted. Image: © F.-X. Coudert/CNRSHigh-tech sponges of infinitely small, nanoporous materials can capture and release gaseous or liquid chemicals in a controlled way. A team of French and German researchers from the Institut de Recherche de Chimie Paris (CNRS/Chimie ParisTech) and the Institut Charles Gerhardt de Montpellier (CNRS/Université de Montpellier/ENSCM) has developed and described one of these materials, DUT-49, whose behavior is totally counterintuitive.

When pressure is increased for a sample of DUT-49 to absorb more gas, the material contracts suddenly and releases its contents — as if, when inhaling, the lungs contracted and expelled the air that they contained. This work, published in Nature, makes it possible to envisage innovative behavior in materials science.

Capturing toxic molecules in ambient air, storing hydrogen, targeting drug release — the list of applications that could use flexible nanoporous materials is endless. These materials use the large surface area in their pores to capture and store gaseous or liquid molecules: this phenomenon is called adsorption. Their pores can adsorb impressive quantities of products; they keep getting bigger until they reach their flexibility limit.

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Apr 5, 2016

Say Goodbye to Washing Machines

Posted by in categories: materials, nanotechnology

New nanostructure material that self cleans. No more need for washing clothes and other fabrics.


A spot of sunshine is all it could take to get your washing done, thanks to pioneering nano research into self-cleaning textiles.

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Apr 5, 2016

Controversial Dark Matter Claim Faces Ultimate Test

Posted by in categories: cosmology, materials

Multiple teams finally have the material they need to repeat an enigmatic experiment.

By Davide Castelvecchi, Nature magazine on April 5, 2016.

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Apr 4, 2016

Artificial molecules

Posted by in categories: 3D printing, materials

Scientists at ETH Zurich and IBM Research Zurich have developed a new technique that enables for the first time the manufacture of complexly structured tiny objects joining together microspheres. The objects have a size of just a few micrometres and are produced in a modular fashion, making it possible to program their design in such a way that each component exhibits different physical properties. After fabrication, it is also very simple to bring the micro-objects into solution. This makes the new technique substantially different from micro 3D printing technology. With most of today’s micro 3D printing technologies, objects can only be manufactured if they consist of a single material, have a uniform structure and are attached to a surface during production.

To prepare the micro-objects, the ETH and IBM researchers use tiny spheres made from a polymer or silica as their building blocks, each with a diameter of approximately one micrometre and different physical properties. The scientists are able to control the particles and arrange them in the geometry and sequence they like.

The structures that are formed occupy an interesting niche in the size scale: they are much larger than your typical chemical or biochemical molecules, but much smaller than typical objects in the macroscopic world. “Depending on the perspective, it’s possible to speak of giant molecules or micro-objects,” says Lucio Isa, Professor for Interfaces, Soft matter and Assembly at ETH Zurich. He headed the research project together with Heiko Wolf, a scientist at IBM Research. “So far, no scientist has succeeded in fully controlling the sequence of individual components when producing artificial molecules on the micro scale,” says Isa.

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