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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 ...

South Asian countries face economic losses due to climate change – A.D.B. report

South Asian countries face economic losses due to climate change – A.D.B. report

Various countries in the South Asian region are looking at significant losses du...

World Bank aids Laos’ hydropower with $40 million in financing

World Bank aids Laos’ hydropower with $40 million in financing

The World Bank Group has inked two agreements for around $40 million in financin...

Vestas, EP Global Energy partner for donor-funded wind farm in Jordan

Vestas, EP Global Energy partner for donor-funded wind farm in Jordan

Wind turbine manufacturer Vestas and private energy asset developer EP Global En...

World Bank commits $5 billion for African renewable energy projects

World Bank commits $5 billion for African renewable energy projects

The World Bank Group has committed US$5 billion towards supporting energy projec...

Seven creative ways to teach your kids about eco-living

Seven creative ways to teach your kids about eco-living

According to Bureau of Labor Statistics, 3.1 million jobs in the United States w...

$50 million A.D.B. loan to develop Indonesia’s geothermal potential

$50 million A.D.B. loan to develop Indonesia’s geothermal potential

The Asian Development Bank will provide Indonesia a loan of up to $50 million to...

Business

Technology

Chewing produces power with new energy harvesting chin strap

Chewing produces power with new energy harvesting chin strap

Thursday, 18 September 2014

The newest clean energy source could be your own jaw. According to a group of researchers in Canada, jaw movements – from eating, chewing and talking ...

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Politics

China takes big step in reducing ozone depleting gases

China takes big step in reducing ozone depleting gases

Tuesday, 16 September 2014

China has taken a big step towards reducing its hydrochlorfluorocarbons by closing down five HCFC production lines. The closure of the five HCFC produ...

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Living Green

Nineteen easy ways students can help save Mother Earth

Nineteen easy ways students can help save Mother Earth

Thursday, 18 September 2014

Students are young, creative, energetic and outspoken that is why they have the perfect qualities to help save mother earth. They can be great eco-war...

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Renewables

Low-Carbon

How green energy is used as a good business magnet

How green energy is used as a good business magnet

Thursday, 18 September 2014

The impetus for businesses turning to renewable energy is simple: to fight climate change. There’s no resource more important than the planet we live ...

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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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