Science

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A new paradigm for nanoscale resolution MRI has been experimentally achieved

A team from the University of Illinois at Urbana-Champaign and Northwestern University has devised a novel nuclear magnetic resonance imaging (MRI) technique that delivers a roughly 10­nanometer spatial resolution. This represents a significant advance in MRI sensitivity—modern MRI techniques commonly used in medical imaging yield spatial resolutions on the millimeter length scale, with the highest-resolution experimental instruments giving spatial resolution of a few micrometers.

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Illustration of the experimental setup shows the two unique components of the teams novel MRI technique that was successful in producing a 2D MRI image with spatial resolution on the nanoscale.

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M60-UCD1: NASA's Hubble and Chandra Find Evidence for Densest Nearby Galaxy

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The densest galaxy in the nearby Universe may have been found. This galaxy weighs more than 200 million suns, over half of which is concentrated within a radius of just 80 light years.The density of stars in that region is 15,000 times greater than found in Earth's neighborhood in the Milky Way.

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Application of Gold Nanosensors to Measure Blood Clotting Agent

Iranian researchers from Shiraz University in association with researchers from Razi Kermanshah University used gold nanoparticles and designed sensors to measure heparin in blood plasmon samples.

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Creating Electricity with Caged Atoms

A lot of energy is wasted when machines turn hot, unnecessarily heating up their environment. Some of this thermal energy could be harvested using thermoelectric materials; they create electric current when they are used to bridge hot and cold objects.

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Clathrates: crytals enclosing single atoms

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Arctic sea ice reaches lowest extent for 2013

The National Snow and Ice Data Center (NSIDC) is part of the Cooperative Institute for Research in Environmental Sciences at the University of Colorado Boulder. NSIDC scientists provide Arctic Sea Ice News & Analysis content, with partial support from NASA.

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Scientists watch from the deck of the U.S. Coast Guard Cutter Healy as it cuts through multiyear sea ice in the Arctic Ocean on July 6, 2011.

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Densest array of carbon nanotubes grown to date: New technique could one day help improve the performance of microelectronics in devices ranging from batteries to spacecraft

Carbon nanotubes' outstanding mechanical, electrical and thermal properties make them an alluring material to electronics manufacturers. However, until recently scientists believed that growing the high density of tiny graphene cylinders needed for many microelectronics applications would be difficult.

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Scanning electron microscope images are of CNT forests with low and high density.

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NASA Curiosity Rover Detects No Methane on Mars

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This picture shows a lab demonstration of the measurement chamber inside the Tunable Laser Spectrometer, an instrument that is part of the Sample Analysis at Mars investigation on NASA's Curiosity rover.

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Young Stars Cooking in the Prawn Nebula

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The glowing jumble of gas clouds visible in this new image make up a huge stellar nursery nicknamed the Prawn Nebula. Taken using the VLT Survey Telescope at ESO’s Paranal Observatory in Chile, this may well be the sharpest picture ever taken of this object. It shows clumps of hot new-born stars nestled in among the clouds that make up the nebula.

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Container's material properties affect the viscosity of water at the nanoscale: Glass or plastic?

Water pours into a cup at about the same rate regardless of whether the water bottle is made of glass or plastic.

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This illustration shows how the different effective viscosity of water affects the force required to slide two surfaces separated by a thin layer of water when confined by a hydrophilic material or a hydrophobic material.

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In water as in love, likes can attract

At some point in elementary school you were shown that opposite charges attract and like charges repel. This is a universal scientific truth - except when it isn't. A research team led by Berkeley Lab chemist Richard Saykally and theorist David Prendergast, working at the Advanced Light Source (ALS), has shown that, when hydrated in water, positively charged ions (cations) can actually pair up with one another.

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This model of the guanidinium chloride salt (blue and silver) in solution shows carbon (yellow) and water (green) surrounding the cations and demonstrates cation-cation pairing.