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U.N. chief welcomes announcements made in Climate Summit

U.N. chief welcomes announcements made in Climate Summit

United Nations Secretary-General Ban Ki-moon welcomed bold new actions to addres...

Climate Summit sees intiatives and commitments

Climate Summit sees intiatives and commitments

Various bodies and entities on the Climate Summit in New York have announced the...

Climate Rally reaches 310,000 participants

Climate Rally reaches 310,000 participants

The number of people who joined the People’s Climate March this September 21 rea...

China takes big step in reducing ozone depleting gases

China takes big step in reducing ozone depleting gases

China has taken a big step towards reducing its hydrochlorfluorocarbons by closi...

Ozone layer on road to recovery – U.N.E.P., W.M.O.

Ozone layer on road to recovery – U.N.E.P., W.M.O.

The ozone layer is on the road to recovery, but unified action is still needed t...

Green vacation: Go on an eco-friendly safari

Green vacation: Go on an eco-friendly safari

The primary goal of modern-day eco-friendly African safaris is to lessen the ove...

Nepal, the Maldives, and Bhutan could lose around 2 percent G.D.P. due to climate change – A.D.B. report

Nepal, the Maldives, and Bhutan could lose around 2 percent G.D.P. due to climate change – A.D.B. report

Nepal, the Maldives, and Bhutan could be looking at economic losses of around 2 ...

Business

Technology

More ethanol-tolerant yeast for more biofuel production

More ethanol-tolerant yeast for more biofuel production

Thursday, 09 October 2014

Yeast is an important component in the ethanol production process; however, high concentrations of ethanol are toxic to yeast. In order to improve the...

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Politics

New Yorkers support renewables, opposes fracking – N.R.D.C. poll

New Yorkers support renewables, opposes fracking – N.R.D.C. poll

Sunday, 12 October 2014

A state-wide poll commissioned for the Natural Resources Defense Council reveals that New Yorkers oppose fracking and support clean, renewable energy....

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Living Green

Kitchen green-over: Seven easy steps to an eco-friendly kitchen

Kitchen green-over: Seven easy steps to an eco-friendly kitchen

Wednesday, 22 October 2014

According to a World Health Organization Report, the global temperature has gotten warmer at about 1 degree Celsius over the 20th century. Although th...

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Renewables

Low-Carbon

Sony Pictures Entertainment installs 60 E.V. chargers for employee use

Sony Pictures Entertainment installs 60 E.V. chargers for employee use

Tuesday, 21 October 2014

A total of 60 charging stations have been installed at Sony Pictures Entertainment’s lot and offices in Culver City, California. The installation is s...

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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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