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Sat12202014

Boeing successfully completes test flight with green diesel

Boeing successfully completes test flight with green diesel

Boeing has completed the world’s first flight using green diesel. On December 3,...

U.N.F.C.C.C. head urges climate action as Lima Conference begins

U.N.F.C.C.C. head urges climate action as Lima Conference begins

United Nations Framework Convention on Climate Change Executive Secretary Christ...

Philippines houses world’s largest solar-powered mall

Philippines houses world’s largest solar-powered mall

A mall in the capital city of the Philippines is now sporting a 1.5-megawatt sol...

U.S., China announce significant emissions reduction cuts

U.S., China announce significant emissions reduction cuts

The Governments of the United States and China have announced that they will be ...

Best Eco Cars of 2014

Best Eco Cars of 2014

Eco-friendly cars, also referred to as green cars, are vehicles that have a less...

Largest wind farm in Southeast Asia goes online in the Philippines

Largest wind farm in Southeast Asia goes online in the Philippines

The largest wind farm in Southeast Asia, a 150-megawatt installation in the Phil...

SPI Solar to acquire 360 MW worth of solar power projects in China

SPI Solar to acquire 360 MW worth of solar power projects in China

Solar Power, Inc. is set to become one of the largest solar developers in China....

Business

tenKsolar expands manufacturing capacity in Thailand

tenKsolar expands manufacturing capacity in Thailand

Friday, 19 December 2014

tenKsolar is establishing new production lines in Thailand for their manufacture of their solar modules. tenKsolar, which is based in Minneapolis, des...

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Technology

Bacteria producing sweet-smelling compound for greener fuels

Bacteria producing sweet-smelling compound for greener fuels

Tuesday, 02 December 2014

A sweet-smelling chemical compound primarily used in fragrances and flavoring is being studied for its potential as a clean and green biofuel. Methyl ...

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Politics

U.N. chief hails results of C.O.P. 20

U.N. chief hails results of C.O.P. 20

Wednesday, 17 December 2014

United Nations Secretary-General Ban Ki-moon hailed the results of the recently concluded Conference of the Parties in Lima, Peru. The Secretary-Gener...

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Living Green

Incandescent bulbs now entering their homestretch

Incandescent bulbs now entering their homestretch

Saturday, 06 December 2014

Nearly 125 years after the invention of the light bulb – technology that revolutionized the world’s way of life and living – the phased ban on sale of...

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Renewables

Low-Carbon

Seven eco-friendly home heating solutions

Seven eco-friendly home heating solutions

Friday, 12 December 2014

Environmentally friendly home heating solutions are valuable for the planet, and can lower your utility bills. With the numerous home heating alternat...

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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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