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Tue07222014

R.E.S. Americas orders 166 MW-worth of wind turbines from Vestas

R.E.S. Americas orders 166 MW-worth of wind turbines from Vestas

Wind turbine manufacturer Vestas has received an order from Renewable Energy Sys...

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Unsustainable urban life: What's next?

Unsustainable urban life: What's next?

Nutrition plays a critical role in everyone’s chance at a better future. Hunger...

Business

The Bioplastics industry in Korea – Where to next?

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Thursday, 10 July 2014

The global bioplastics market is booming – total production capacity is set to grow 400% by 2017, and the European Commission has designatedbioplastic...

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Technology

Jumping water droplets – generating power anywhere

Jumping water droplets – generating power anywhere

Sunday, 20 July 2014

The next-generation of cellphones and other personal gadgets could be powered by water droplets. A team of researchers from the Massachusetts Institut...

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Politics

Living Green

Something old becomes new and green - new purposes for old things

Something old becomes new and green - new purposes for old things

Tuesday, 15 July 2014

We buy things that we need or not, we use them, then often throw them away for the simple reason that we don't find them functional anymore. Well, thi...

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Renewables

EDF purchases wind farm to provide clean power to Microsoft

EDF purchases wind farm to provide clean power to Microsoft

Sunday, 20 July 2014

A 175 megawatt-wind farm 60 miles southwest of the city of Chicago in Illinois has been purchased by EDF Renewable Energy. The Pilot Hill Wind Project...

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Low-Carbon

Opinion

Unsustainable urban life: What's next?

Unsustainable urban life: What's next?

Wednesday, 11 June 2014

Nutrition plays a critical role in everyone’s chance at a better future. Hunger, said Benjamin Franklin once, is the best pickle. Some say “pickle”...

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New nanocrystals for efficient lighting and carbon capture


Molecular Foundry post-doctoral scholar Hoi Ri Moon, staff scientist Jeff Urban and Facility Director Delia Milliron demonstrate magnesium oxide nanocrystals that could be a bright candidate for solid-state lighting. (Photo by Roy Kaltschmidt, Berkeley Lab Public Affairs)

Berkeley Lab researchers have produced a nanocrystal that can store carbon. The researchers have produced non-toxic magnesium oxide nanocrystals that efficiently emit blue light and could also play a role in the long-term storage of carbon dioxide.

Using an organometallic chemical synthesis route, scientists at the Molecular Foundry have created nanocrystals of the low-cost white mineral magnesium oxide. One of the most striking new characteristics of this process is that the nanocrystals glow blue when exposed to ultraviolet light.

The researchers are proposing that these new blue nanocrystals can be used in solid-state lighting (SSL), which makes use of light-emitting semiconductor materials. SSL provides light while consuming less energy for a longer life span than conventional lighting methods.

Solid-state lighting uses light emitting diodes (LEDs) or organic light emitting diodes (OLEDs) as sources of illumination and these use red-, green-, and blue-emitting materials combined to create white light. Blue light emitters are difficult to come by and the new nanocrystals could be a candidate for use in LEDs or OLEDs.

Another promising use for these nanocrystals would be in carbon capture and storage for greenhouse gas emission reduction.
The magnesium oxide nanocrystals will be the subject of study by the Berkeley Lab’s Energy Frontier Research Center (EFRC) for Nanoscale Control of Geologic CO2.

One proposed was to capture and store carbon dioxide (CO2) emissions, which involves pumping captured carbon dioxide underground where it can form carbonate materials with the surrounding rock. The reaction needed to form carbonate needs mineral oxides such as magnesium oxide.

“These nanocrystals will serve as a test system for modeling the kinetics of dissolution and mineralization in a simulated fluid-rock reservoir, allowing us to probe a key pathway in carbon dioxide sequestration,” said Jeff Urban, a staff scientist in the Inorganic Nanostructures Facility at the Molecular Foundry who is also a member of the EFRC research team. “The geological minerals that fix magnesium into a stable carbonate are compositionally complex, but our nanocrystals will provide a simple model to mimic this intricate process.”

The Molecular Foundry at Lawrence Berkeley National Laboratory is one of the five DOE Nanoscale Science Research Centers (NSRCs), premier national user facilities for interdisciplinary research at the nanoscale. Work at the Molecular Foundry was supported by the Office of Basic Energy Sciences within the DOE Office of Science.


- Katrice R. Jalbuena



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References:

1 http://newscenter.lbl.gov/
2 http://newscenter.lbl.gov/feature-stories/2009/07/21/blue-light-nanocrystals/

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