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Smog causes partial car ban in Paris – But is the Diesel Industry to blame?

Smog causes partial car ban in Paris – But is the Diesel Industry to blame?

There’s a choking, Beijingian smog hanging over Parisian skies. Warm, still cond...

Climate change is happening, affecting all areas of the globe – I.P.C.C.

Climate change is happening, affecting all areas of the globe – I.P.C.C.

The effect of climate change is already being felt worldwide, according the Inte...

Hong Kong extends its registration tax exemption for E.V.s

Hong Kong extends its registration tax exemption for E.V.s

Hong Kong has passed a resolution that will extend its first registration tax ex...

Make a green choice by purchasing eco-clothing for your kids

Make a green choice by purchasing eco-clothing for your kids

There are several benefits of organic kid’s clothing. As people are becoming env...

Restoring the beauty of the Chesapeake Bay

Restoring the beauty of the Chesapeake Bay

The Chesapeake Bay is America’s largest estuary, which is a body of water that l...

Norway to invest in renewable energy

Norway to invest in renewable energy

Norwegian Prime Minister Erna Solberg has announced that the country’s governmen...

Solenergy taps Philippines’ solar power potential

Solenergy taps Philippines’ solar power potential

Solar power system design and installation company Solenergy Systems Inc. has be...

Business

Smog causes partial car ban in Paris – But is the Diesel Industry to blame?

Smog causes partial car ban in Paris – But is the Diesel Industry to blame?

Monday, 07 April 2014

There’s a choking, Beijingian smog hanging over Parisian skies. Warm, still conditions have caused car fumes and chemicals to collect above the city a...

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Technology

Politics

Living Green

Good cooperation between animals and humans can save the environment

Good cooperation between animals and humans can save the environment

Monday, 21 April 2014

Even though humans are regarded as the most intelligent beings of the lot, recent researches show that, without the help of some particular animals, i...

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Renewables

Four uses of wind energy around your home

Four uses of wind energy around your home

Monday, 21 April 2014

Wind is a source of energy that is freely and abundantly available in nature. Harnessing it and using it for energy generation will not only make it p...

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Low-Carbon

GHG emissions from Agriculture have increased – U.N. F.A.O.

GHG emissions from Agriculture have increased – U.N. F.A.O.

Monday, 21 April 2014

New estimates from the United Nations Food and Agriculture Organization show that greenhouse gas emissions from the agricultural sector have increased...

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Opinion

Restoring the beauty of the Chesapeake Bay

Restoring the beauty of the Chesapeake Bay

Thursday, 27 March 2014

The Chesapeake Bay is America’s largest estuary, which is a body of water that links rivers to the sea and acts as a bridge between freshwater and sal...

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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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