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New optical tweezers trap specimens just a few nanometers across

New optical tweezers trap specimens just a few nanometers across | Science et Technique Veille | Scoop.it
A microscale technique known as optical trapping uses beams of light as tweezers to hold and manipulate tiny particles.
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'Exotic' material is like a switch when super thin

'Exotic' material is like a switch when super thin | Science et Technique Veille | Scoop.it
Researchers have shown how to switch a particular transition metal oxide, a lanthanum nickelate, from a metal to an insulator by making the material less than a nanometer thick.
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Le spaser, un laser à plasmons, promesse d'une électronique nouvelle ?

Le spaser, un laser à plasmons, promesse d'une électronique nouvelle ? | Science et Technique Veille | Scoop.it
Les dispositifs qui prendront le relais des composants électroniques d'aujourd'hui pourraient bien utiliser des plasmons émis par l'équivalent des lasers, les spasers.
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Engineers develop new materials for hydrogen storage

Engineers develop new materials for hydrogen storage | Science et Technique Veille | Scoop.it
Engineers have created new ceramic materials that could be used to store hydrogen safely and efficiently. The researchers have created for the first time compounds made from mixtures of calcium hexaboride, strontium and barium hexaboride.
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Repeated self-healing now possible in composite materials

Repeated self-healing now possible in composite materials | Science et Technique Veille | Scoop.it
Internal damage in fiber-reinforced composites, materials used in structures of modern airplanes and automobiles, is difficult to detect and nearly impossible to repair by conventional methods.
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New self-healing plastics developed

New self-healing plastics developed | Science et Technique Veille | Scoop.it
Scratches in the car finish or cracks in polymer material: Self-healing materials can repair themselves by restoring their initial molecular structure after the damage.
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Expanding particles to engineer defects: Adding larger particle to crystalline system can create order rather than distortions

Expanding particles to engineer defects: Adding larger particle to crystalline system can create order rather than distortions | Science et Technique Veille | Scoop.it
Materials scientists have long known that introducing defects into three-dimensional materials can improve their mechanical and electronic properties.
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Thermoelectric generator on glass fabric for wearable electronic devices

Thermoelectric generator on glass fabric for wearable electronic devices | Science et Technique Veille | Scoop.it
Wearable computers or devices have been hailed as the next generation of mobile electronic gadgets, from smart watches to smart glasses to smart pacemakers.
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Emerging research suggests a new paradigm for 'unconventional superconductors'

Emerging research suggests a new paradigm for 'unconventional superconductors' | Science et Technique Veille | Scoop.it
Scientists have reported the first experimental observation of the quantum critical point in the extensively studied 'unconventional superconductor' TiSe2, finding that it does not reside as predicted within the superconducting dome of the phase...
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Steel-fiber reinforced concrete for conventional construction work as well

Steel-fiber reinforced concrete for conventional construction work as well | Science et Technique Veille | Scoop.it
When adding steel fibers the size of a clip, concrete is less prone to cracking, an engineer demonstrates.
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Energy breakthrough uses sun to create solar energy materials

Energy breakthrough uses sun to create solar energy materials | Science et Technique Veille | Scoop.it
Researchers have discovered a way to tap the sun not only as a source of power, but also to directly produce the solar energy materials that make this possible.
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Fabricating nanostructures with silk could make clean rooms green rooms

Fabricating nanostructures with silk could make clean rooms green rooms | Science et Technique Veille | Scoop.it
Engineers have demonstrated that it is possible to generate nanostructures from silk in an environmentally friendly process that uses water as a developing agent and standard fabrication techniques.
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Des nouveaux matériaux créés avec des bactéries

Des nouveaux matériaux créés avec des bactéries | Science et Technique Veille | Scoop.it
Au MIT, les chercheurs tentent de développer des matériaux combinant les propriétés du vivant et les atouts de l’univers du non-vivant, afin de mêler les capacités de multiplication et de réponse aux contraintes environnementales à la conduction...
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Pourquoi les batteries lithium-ion vieillissent-elles ? (Energie)

Pourquoi les batteries lithium-ion vieillissent-elles ? (Energie) | Science et Technique Veille | Scoop.it
Des chercheurs du Centre Helmholtz de recherche sur les matériaux et l'énergie (HZB) de Berlin se sont intéressés à la question du vieillissement des batteries lithium-ion.
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Electrochemical exfoliation produces high-quality graphene in a very short time

Graphene is easy to acquire, at least in small amounts. The first scientists to isolate the strong, two-dimensional carbon material simply pressed a piece of Scotch tape to a chunk of graphite and peeled it off.

Via Dr. Stefan Gruenwald
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Researchers discover that tin selenide is best at converting waste heat to electricity

Researchers discover that tin selenide is best at converting waste heat to electricity | Science et Technique Veille | Scoop.it
One strategy for addressing the world’s energy crisis is to stop wasting so much energy when producing and using it, which can happen in coal-fired power plants or transportation. Nearly two-thirds of energy input is lost as waste heat.

Via Dr. Stefan Gruenwald
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Making new materials an atomic layer at a time

Making new materials an atomic layer at a time | Science et Technique Veille | Scoop.it
Researchers have shown the ability to grow high quality, single-layer materials one on top of the other using chemical vapor deposition.
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Des batteries qui allient super capacité et charge ultra-rapide (Electronique)

Des batteries qui allient super capacité et charge ultra-rapide (Electronique) | Science et Technique Veille | Scoop.it
Deux équipes de recherche de l'UCL sont parvenues à lever un verrou technologique dans l'utilisation des batteries lithium-ion.
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Novel technique opens door to better solar cells, superconductors and hard drives

Novel technique opens door to better solar cells, superconductors and hard drives | Science et Technique Veille | Scoop.it
A new invention solves long-standing mystery in the physics of condensed matter and enhances our understanding of interfaces between materials.
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Optimiser l'utilisation des matières premières (Matériaux)

Optimiser l'utilisation des matières premières (Matériaux) | Science et Technique Veille | Scoop.it
L'Université Carl von Ossietzky d'Oldenbourg (Basse-Saxe) a récemment lancé un nouveau groupe de recherche, baptisé "Cascade Use" [1], et dont les travaux portent sur l'amélioration de l'usage des matières premières.
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Sunlight generates hydrogen in new porous silicon

Sunlight generates hydrogen in new porous silicon | Science et Technique Veille | Scoop.it
Porous silicon manufactured in a bottom up procedure using solar energy can be used to generate hydrogen from water, according to mechanical engineers who also see applications for batteries, biosensors and optical electronics as outlets for this...
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Heat‐conducting polymer cools hot electronic devices at 200 degrees C

Heat‐conducting polymer cools hot electronic devices at 200 degrees C | Science et Technique Veille | Scoop.it
By harnessing an electropolymerization process to produce aligned arrays of polymer nanofibers, researchers have developed a thermal interface material able to conduct heat 20 times better than the original polymer.
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Ordered carbon-nanotube design may increase conductivity of solar cells by 100 million times

Ordered carbon-nanotube design may increase conductivity of solar cells by 100 million times | Science et Technique Veille | Scoop.it
Controlled placement of carbon nanotubes in nanostructures could result in a huge boost in electronic performance in photovoltaic solar cells, researchers at Umeå University in Sweden have discovered.

Via Dr. Stefan Gruenwald
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Ultra-thin light detectors: Metamaterials and quantum cascade structures combined for first time

Ultra-thin light detectors: Metamaterials and quantum cascade structures combined for first time | Science et Technique Veille | Scoop.it
A new, extremely thin kind of light detectors has been developed. Two very different technologies were combined for the first time: metamaterials and quantum cascade structures.
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Strange materials cropping up in condensed matter laboratories

Strange materials cropping up in condensed matter laboratories | Science et Technique Veille | Scoop.it
Physicists are using surprising ideas and mathematical tools originating in string theory to guide research into strange materials that are cropping up in condensed matter laboratories.
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Vers des plastiques qui se réparent de manière autonome ? (Matériau)

Vers des plastiques qui se réparent de manière autonome ? (Matériau) | Science et Technique Veille | Scoop.it
Des chercheurs de l'Institut technologique de Karlsruhe (KIT, Bade-Wurtemberg) en coopération avec les industriels d'Evonik, l'Institut Leibniz de recherche en polymères de Dresde (Saxe) et des chercheurs australiens ont développé une réaction de...
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