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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....

Toyota hybrid exceeds 7 million mark in global sales

Toyota hybrid exceeds 7 million mark in global sales

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Suzlon eyes 2,000 MW of wind energy projects in India over next five years

Suzlon eyes 2,000 MW of wind energy projects in India over next five years

India-based wind turbine maker Suzlon has expressed its intent to build 2,000 me...

Solar power could be leading source of electricity by 2050

Solar power could be leading source of electricity by 2050

Solar power could overtake all other sources of electricity by 2050, according t...

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...

Business

Richard Flint, Yorkshire Water CEO, opens self-powered sewage works

Richard Flint, Yorkshire Water CEO, opens self-powered sewage works

Thursday, 13 November 2014

Consuming two years development time and a whopping £34 million investment, Yorkshire’s first self-powered sewage works site has been unveiled in Brad...

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Technology

New polymer materials developed for better solar cells

New polymer materials developed for better solar cells

Wednesday, 19 November 2014

Researchers from North Carolina State University and the Hong Kong University of Science and Technology have developed new materials for more efficien...

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Politics

Extreme weather poses threat to Pacific Islands

Extreme weather poses threat to Pacific Islands

Monday, 24 November 2014

The United Nations has released an advisory note encouraging the Pacific Islands to establish a regional mechanism for better preparedness in line wit...

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Living Green

How to reduce your pooch’s carbon paw print

How to reduce your pooch’s carbon paw print

Wednesday, 19 November 2014

With an increasing number of people becoming environmentally conscious, there is little wonder that several measures are being taken to bring down the...

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Renewables

Philippines houses world’s largest solar-powered mall

Philippines houses world’s largest solar-powered mall

Monday, 24 November 2014

A mall in the capital city of the Philippines is now sporting a 1.5-megawatt solar panel installation. The project by Solar Philippines Commercial Roo...

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Low-Carbon

Is metal the future of construction?

Is metal the future of construction?

Monday, 24 November 2014

Climate change has prompted people to become more cautious of their environment. The constant surge of extreme weather conditions has posed considerab...

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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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