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A.D.B. extends $100 million loan for India’s solar power projects

A.D.B. extends $100 million loan for India’s solar power projects

The Asian Development Bank is extending loans of up to $100 million to aid in pr...

Nebraska Supreme Court, House of Representatives supporting proposed Keystone pipeline route

Nebraska Supreme Court, House of Representatives supporting proposed Keystone pipeline route

Despite misgivings from the public and the White House, proponents of the Keysto...

Obama will not sign Keystone Pipeline bill

Obama will not sign Keystone Pipeline bill

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Senvion completes offshore wind farm over Christmas

Senvion completes offshore wind farm over Christmas

Senvion completed the installation of wind turbines for the Nordsee Ost offshore...

Vestas to supply wind turbines in Greece and Chile

Vestas to supply wind turbines in Greece and Chile

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

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

United Nations Secretary-General Ban Ki-moon hailed the results of the recently ...

Manufacturer’s perspective on the new U.S. emissions reduction target

Manufacturer’s perspective on the new U.S. emissions reduction target

The United States manufacturing sector may be opting for a more diversified way ...

Business

Technology

Advantage of green cloud computing

Advantage of green cloud computing

Tuesday, 13 January 2015

Green computing is the usage of computing resources in an energy- and resource-efficient manner. Part of it is using computers that have been Energy S...

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Politics

Living Green

Eco -friendly Flooring

Eco -friendly Flooring

Friday, 30 January 2015

The term eco – friendly is usually associated with high prices, dull and boring materials and lack of variety. Luckily, the reality is completely diff...

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Renewables

Hereford Wind Project in Texas begins commercial operations

Hereford Wind Project in Texas begins commercial operations

Wednesday, 28 January 2015

The 200-megawatt Hereford Wind Project in Texas has achieved commercial operation. EDF Renewable Energy, which purchased shares of the project in 2013...

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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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