Science

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Argonne scientists announce first room-temperature magnetic skyrmion bubbles: New ideas are bubbling up for more efficient computer memory

Researchers at UCLA and the U.S. Department of Energy's Argonne National Laboratory announced a new method for creating magnetic skyrmion bubbles at room temperature. The bubbles, a physics phenomenon thought to be an option for more energy-efficient and compact electronics, can be created with simple equipment and common materials.

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Iranian Researchers Model, Design Optical Switches

Iranian researchers modeled and designed optical switches to take the place of electronic switches.

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NASA Prepares for First Interplanetary CubeSats

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NASA's two small MarCO CubeSats will be flying past Mars in 2016 just as NASA's next Mars lander, InSight, is descending through the Martian atmosphere and landing on the surface. MarCO, for Mars Cube One, will provide an experimental communications relay to inform Earth quickly about the landing.

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Framework materials yield to pressure

Pressure is a powerful thermodynamic variable that enables the structure, bonding and reactivity of matter to be altered. In materials science it has become an indispensable research tool in the quest for novel functional materials.

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This is a cobalt II octahedral packing diagram as viewed in the (001) plane.

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Framework materials yield to pressure

Pressure is a powerful thermodynamic variable that enables the structure, bonding and reactivity of matter to be altered. In materials science it has become an indispensable research tool in the quest for novel functional materials.

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This is a cobalt II octahedral packing diagram as viewed in the (001) plane.

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Investigation of Optical Properties of Quantum Dots in Presence of Magnetic, Electrical Fields

Iranian researchers from University of Tabriz studied the effect of electrical and magnetic fields on optical properties of quantum dots in a theoretical research.

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New boron compounds for organic light-emitting diodes: Luminescent blue boron-containing nanographenes are highly promising materials for portable electronic devices

Major advances in the field of organic electronics are currently revolutionising previously silicon-dominated semiconductor technology. Customised organic molecules enable the production of lightweight, mechanically flexible electronic components that are perfectly adapted to individual applications. Chemists at the Goethe University have now developed a new class of organic luminescent materials through the targeted introduction of boron atoms into the molecular structures. The compounds described in the professional journal Angewandte Chemie (Applied Chemistry) feature an intensive blue fluorescence and are therefore of interest for use in organic light-emitting diodes (LED's).

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Customized organic molecules enable the production of lightweight, mechanically flexible electronic components that are perfectly adapted to individual applications are shown.

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Development of Gold Nanoparticles That Control Osteogenic Differentiation of Stem Cells

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Human mesenchymal stem cells (hMSCs) resulted from the following steps: each type of gold nanoparticles was added to hMSCs, and the treated cells were cultured for 3 weeks. The cells received either alkaline phosphatase (ALP) staining or alizarin red staining (ARS) of calcium phosphate deposits, both of which are osteogenic differentiation indicators. Control experiments with unmodified gold nanoparticles and untreated hMSCs were also carried out for comparison. In the upper images, ALP positive cells were stained purple while agglomerates of gold nanoparticles were detected as blue dots. In the lower images, spider-web-like red stains represent calcium phosphate deposits while bluish purple dots indicate agglomerates of gold nanoparticles. All scale bars are 500 μm.

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MIPT physicists develop ultrasensitive nanomechanical biosensor

It can analyze the chemical composition of substances and detect biological objects, such as viral disease markers, which appear when the immune system responds to incurable or hard-to-cure diseases, including HIV, hepatitis, herpes, and many others.

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This image shows the principle of the sensor.

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NIST's 'nano-raspberries' could bear fruit in fuel cells

Researchers at the National Institute of Standards and Technology (NIST) have developed a fast, simple process for making platinum 'nano-raspberries' -- microscopic clusters of nanoscale particles of the precious metal. The berry-like shape is significant because it has a high surface area, which is helpful in the design of catalysts. Even better news for industrial chemists: the researchers figured out when and why the berry clusters clump into larger bunches of 'nano-grapes.'

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Colorized micrographs of platinum nanoparticles made at NIST. The raspberry color suggests the particles' corrugated shape, which offers high surface area for catalyzing reactions in fuel cells. Individual particles are 3 to 4 nanometers (nm) in diameter but can clump into bunches of 100 nm or more under specific conditions discovered in a NIST study.

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