Advertisement
Material Science
Subscribe to Material Science
View Sample

FREE Email Newsletter

Innovative imaging technique clarifies molecular self-assembly

May 5, 2014 9:50 am | News | Comments

Super-resolution microscopy has allowed optical imaging of objects with dimensions smaller than the diffraction limit. Researchers studying a type of material called supramolecular polymers have used this type of imaging to develop a new technique that allows them study molecular self-assembly at an unprecedented level of detail.

New mathematical framework characterizes graphene’s shape

May 5, 2014 8:51 am | News | Comments

Scientists studying graphene’s properties are using a new mathematical framework to make extremely accurate characterizations of the 2-D material’s shape. The framework, called discrete differential geometry, is the geometry of 2-D interlaced structures called meshes. When the nodes of the structure correspond with atomic positions, this geometry provides direct information about chemistry and electrical properties.

Probing dopant distribution

May 5, 2014 7:45 am | by Rachel Berkowitz, Lawrence Berkeley National Laboratory | News | Comments

The icing on the cake for semiconductor nanocrystals that provide a non-damped optoelectronic effect may exist as a layer of tin that segregates near the surface. One method of altering the electrical properties of a semiconductor is by introducing impurities called dopants. A team of researchers has demonstrated that equally important as the amount of dopant is how the dopant is distributed on the surface and throughout the material.

Advertisement

Self-healing smart beads detect and repair corrosion

May 2, 2014 2:41 pm | News | Comments

Scientists at Battelle have developed a tiny bead that not only detects corrosion but delivers a payload to help heal the microscopic cracks that rust creates. Called the Battelle Smart Corrosion Detector, the beads look like a fine, whitish powder that can be mixed with coatings used to protect pipelines and other critical infrastructure subject to corrosion. Self-activating, they release a proprietary chemical that fills cracks.

Edgy look at 2-D molybdenum disulfide

May 2, 2014 7:50 am | by Lynn Yarris, Lawrence Berkeley National Laboratory | News | Comments

The drive to develop ultra-small and ultra-fast electronic devices using a single atomic layer of semiconductors, such as transition metal dichalcogenides, has received a significant boost. Researchers with Lawrence Berkeley National Laboratory have recorded the first observations of a strong nonlinear optical resonance along the edges of a single layer of molybdenum disulfide.

Playing pool with carbon atoms

May 1, 2014 8:14 am | by Daniel Stolte, Univ. of Arizona Relations | News | Comments

A Univ. of Arizona-led team of physicists has discovered how to change the crystal structure of graphene with an electric field, an important step toward the possible use of graphene in microprocessors that would be smaller and faster than current, silicon-based technology.

New fluorescent hybrid material changes color according to light direction

April 30, 2014 2:39 pm | News | Comments

Researchers in Spain have developed a highly fluorescent hybrid material that changes color depending on the polarization of the light that it is illuminated by. They achieved this with a perfect fit between an inorganic nanostructure and dye molecules.

Flexible pressure-sensor film shows how much force a surface “feels”

April 30, 2014 11:43 am | News | Comments

A newly developed pressure sensor could help car manufacturers design safer automobiles and even help Little League players hold their bats with a better grip, scientists report. The study describing their high-resolution sensor, which can be painted onto surfaces or built into gloves, appears in Nano Letters.

Advertisement

Solving a mystery of thermoelectrics

April 30, 2014 10:16 am | by David L. Chandler, MIT News Office | News | Comments

Materials that can be used for thermoelectric devices have been known for decades. But, until now, there has been no good explanation for why just a few materials work well for these applications, while most others do not. Now researchers say they have finally found a theoretical explanation for the differences, which could lead to the discovery of new, improved thermoelectric materials.

Harnessing magnetic vortices for making nanoscale antennas

April 30, 2014 8:25 am | by Karen McNulty Walsh, Brookhaven National Laboratory | News | Comments

Scientists at Brookhaven National Laboratory are seeking ways to synchronize the magnetic spins in nanoscale devices to build tiny yet more powerful signal-generating or receiving antennas and other electronics. Their latest work shows that stacked nanoscale magnetic vortices separated by a thin layer of copper can be driven to operate in unison, potentially producing a powerful signal that could be put to work in new electronics.

New material for flat semiconductors

April 30, 2014 7:49 am | by David L. Chandler, MIT News Office | News | Comments

Researchers around the world have been working to harness the unusual properties of graphene, a 2-D sheet of carbon atoms. But graphene lacks one important characteristic that would make it even more useful: a property called a bandgap, which is essential for making devices such as computer chips and solar cells.

New production method for transparent conductive films is eco-friendly

April 29, 2014 11:40 am | News | Comments

Transparent conductive (TCO) films, present in tablets, laptops, flat screens and solar cells, are now an integral part of our lives. Yet they are expensive and complex to manufacture. Researchers in Europe have recently succeeded in developing a method of producing TCO films that relies on molecular self-organization. The technique is cheaper, simpler and more environmentally friendly than the traditional sputtering approach.

New MIT building to be a hub for nanoscale research

April 29, 2014 11:27 am | by David L. Chandler, MIT News Office | News | Comments

Starting in 2018, researchers at Massachusetts Institute of Technology will have access to a new building dedicated to nanoscale research at the heart of the Cambridge campus. The 200,000-ft2 building, called “MIT.nano,” will be built at the heart of the Cambridge campus and will house cleanroom, imaging and prototyping facilites. An estimated 2,000 MIT researchers may ultimately make use of the building.

Advertisement

Researchers see rare-earth-like magnetic properties in iron

April 29, 2014 10:12 am | News | Comments

Scientists at Ames Laboratory have observed magnetic properties typically associated with those observed in rare-earth elements in iron. These properties are observed in a new iron based compound that does not contain rare earth elements, when the iron atom is positioned between two nitrogen atoms.

A glassy look for manganites

April 29, 2014 8:21 am | by Lynn Yarris, Lawrence Berkeley National Laboratory | News | Comments

Manganites show great promise as “go-to” materials for future electronic devices because of their ability to instantly switch from an electrical insulator to a conductor under a wide variety of external stimuli, including magnetic fields, photo-excitations and vibrational excitations. This ultra-fast switching arises from the different ways electrons and electron-spins in a manganite may organize or re-organize in response to such stimuli.

Putting iron to the stress test

April 29, 2014 8:11 am | by Anne M. Stark, Lawrence Livermore National Laboraotry | News | Comments

Using an ultra-fast laser system, a group in Physical and Life Sciences at Lawrence Livermore National Laboratory have subjected iron to extremely rapid dynamic compression and have shown that the transition from one crystal structure to another can take place in less than 100 trillionths of a second after the compression begins.

Graphene only as strong as weakest link

April 29, 2014 8:00 am | by Mike Williams, Rice Univ. | News | Comments

There is no disputing graphene is strong. But new research by Rice Univ. and the Georgia Institute of Technology should prompt manufacturers to look a little deeper as they consider the miracle material for applications. The atom-thick sheet of carbon discovered this century is touted not just for its electrical properties, but also for its physical strength and flexibility.

Study: Graphene not all good

April 29, 2014 7:45 am | by Sean Nealon, Univ. of California, Riverside | News | Comments

Graphene oxide nanoparticles are an oxidized form of graphene, a single layer of carbon atoms prized for its strength, conductivity and flexibility. In a first-of-its-kind study of how a material some think could transform the electronics industry moves in water, researchers have found that these graphene oxide nanoparticles are very mobile in lakes or streams and therefore likely to cause negative environmental impacts if released.

How to create nanowires only three atoms wide with an electron beam

April 28, 2014 11:21 am | News | Comments

Junhao Lin, a Vanderbilt Univ. graduate student and visiting scientist at Oak Ridge National Laboratory, has found a way to use a finely focused beam of electrons to create some of the smallest wires ever made. The flexible metallic wires are only three atoms wide: One thousandth the width of the microscopic wires used to connect the transistors in today’s integrated circuits.

Nissan develops first "self-cleaning" car prototype

April 28, 2014 11:00 am | Videos | Comments

Washing a car can be a costly and time-consuming chore. The European model of Nissan’s Note will be the first car to wear a new type of paint which could make car washes obsolete. The paint has been engineered to be super-hydrophobic and oleophobic, meaning it repels both water and oils. The tests may result in an aftermarket application.

Label-free, sequence-specific, inexpensive fluorescent DNA sensors

April 28, 2014 8:03 am | by Karen McNulty Walsh, Brookhaven National Laboratory | News | Comments

Using principles of energy transfer more commonly applied to designing solar cells, scientists at Brookhaven National Laboratory have developed a new highly sensitive way to detect specific sequences of DNA, the genetic material unique to every living thing. The method is considerably less costly than other DNA assays and has widespread potential for applications in forensics, medical diagnostics and the detection of bioterror agents.

Flexible battery, no lithium required

April 28, 2014 7:39 am | News | Comments

A Rice Univ. laboratory has flexible, portable and wearable electronics in its sights with the creation of a thin film for energy storage. The laboratory developed a flexible material with nanoporous nickel-fluoride electrodes layered around a solid electrolyte to deliver battery-like supercapacitor performance that combines the best qualities of a high-energy battery and a high-powered supercapacitor without lithium.

The magic of molybdenite: solar cells and light-emitting diodes

April 28, 2014 7:30 am | by Sarah Perrin | News | Comments

Molybdenite has been instrumental in research at the Federal Institute of Technology in Switzerland (EPFL), where scientists have used it to develop a computer chip, flash memory device and a photographic sensor. Now, they have again tapped into the electronic potential of MoS2 by creating diodes that can emit light or absorb it to produce electricity.

Atomic switcheroo explains origins of thin-film solar cell mystery

April 24, 2014 7:55 am | by Morgan McCorkle, Oak Ridge National Laboratory | News | Comments

Treating cadmium-telluride (CdTe) solar cell materials with cadmium-chloride improves their efficiency, but researchers have not fully understood why. Now, an atomic-scale examination of the thin-film solar cells led by Oak Ridge National Laboratory has answered this decades-long debate about the materials’ photovoltaic efficiency increase after treatment.

When things get glassy, molecules go fractal

April 24, 2014 7:36 am | News | Comments

Combining theory and numerical simulations, researchers have resolved an enduring question in the theory of glasses by showing that their energy landscapes are far rougher than previously believed. The new model, which shows that molecules in glassy materials settle into a fractal hierarchy of states, unites mathematics, theory and several formerly disparate properties of glasses.

X
You may login with either your assigned username or your e-mail address.
The password field is case sensitive.
Loading