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New synthesis method may shape future of nanostructures, clean energy
Date:9/2/2014

ent novel electronic and optoelectronic functions. [Their] new approach makes it feasible for researchers to realize much more sophisticated nanostructure designs than were previously possible." he says.

Lighting a Way to Efficient Clean Power Generation

The team's second discovery may allow full realization of a light-generated nanoparticle effect first used by ancient Romans to create glass that changes color based on light.. This effect, known as surface plasmon resonance, involves the generation of high energy electrons using light.

More accurately explains Ouyang, plasmon resonance is the generation of a collective oscillation of low energy electrons by light. And the light energy stored in such a "plasmonic oscillator" then can be converted to energetic carriers (i.e., "hot" electrons)" for use in various applications.

In recent years, many scientists have been trying to apply this effect to the creation of more efficient photocatalysts for use in the production of clean energy. Photocatalysts are substances that use light to boost chemical reactions. Chlorophyll is a natural photocatalyst used by plants.

"The ingenious nano-assemblies that Professor Ouyang and his collaborators have fabricated, which include the novel feature of a silver-gold particle that super-efficiently harvests light, bring us a giant step nearer the so-far elusive goal of artificial photosynthesis: using sunlight to transform water and carbon dioxide into fuels and valuable chemicals," says Professor Martin Moskovits of the University of California at Santa Barbara, a widely recognized expert in this area of research and not affiliated with the paper.

Indeed, using sunlight to split water molecules into hydrogen and oxygen to produce hydrogen fuel has long been a clean energy "holy grail". However, decades of research advances have not yielded photocatalytic methods with sufficient energy efficiency to be cost effective for use i
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Contact: Lee Tune
ltune@umd.edu
301-405-4679
University of Maryland
Source:Eurekalert

Page: 1 2 3

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