One of the interesting side effects of last year’s stimulus bill was $400 million in funding for ARPA-E, the civilian, energy-focused cousin of DARPA. And in this week’s first ever ARPA-E conference, MIT chemist Dan Nocera showed how well he put that stimulus money to use by highlighting his new photosynthetic process. Using a special catalyst, the process splits water into oxygen and hydrogen fuel efficiently enough to power a home using only sunlight and a bottle of water.

In about four hours, water treated with Nocera’s catalyst can produce 30 kilowatt-hours of energy. Moreover, the process is cheap. So cheap, in fact, that Nocera has no problem envisioning a day when each house generates its own fuel and electricity from photosynthesis.

Source

• View Comments

Material scientists at the Nano/Bio Interface Center of the University of Pennsylvania have demonstrated the transduction of optical radiation to electrical current in a molecular circuit.

The system, an array of nano-sized molecules of gold, respond to electromagnetic waves by creating surface plasmons that induce and project electrical current across molecules, similar to that of photovoltaic solar cells.

The results may provide a technological approach for higher efficiency energy harvesting with a nano-sized circuit that can power itself, potentially through sunlight. Recently, surface plasmons have been engineered into a variety of light-activated devices such as biosensors.

Read more

• View Comments

The U.S. Feeds One Quarter of its Grain to Cars While Hunger is on the Rise!

The 107 million tons of grain that went to U.S. ethanol distilleries in 2009 was enough to feed 330 million people for one year at average world consumption levels. More than a quarter of the total U.S. grain crop was turned into ethanol to fuel cars last year. With 200 ethanol distilleries in the country set up to transform food into fuel, the amount of grain processed has tripled since 2004.

When the growing demand for corn for ethanol helped to push world grain prices to record highs between late 2006 and 2008, people in low-income grain-importing countries were hit the hardest. The unprecedented spike in food prices drove up the number of hungry people in the world to over 1 billion for the first time in 2009.

Full Report

• View Comments

Solar technology is going where it has never gone before: onto the shelves at retail stores where do-it-yourselfers can now plunk a panel into a shopping cart and bring it home to install.

Lowe’s has begun stocking solar panels at its California stores and plans to roll them out across the country next year.

This shows how far the highest of the high-tech alternative energy technologies has come. Solar power is now accessible to anyone with a ladder, a power drill, and the gumption to climb up on a roof and install the panels themselves.

For Lowe’s, it’s an opening into a new and potentially lucrative DIY business.

Read more

• View Comments

The Danish National Laboratory for Sustainable Energy has successfully tested the world’s first wind turbine with a built-in laser-based anemometer.

A laser-based anemometer allows the wind turbine to “see” the wind before it touches the blades. With this information, the turbine can optimize both its position and the blades to use the wind more efficiently. It also increases the longevity of the turbine.

This new Danish laser technology means that wind turbines are able to “see” the wind, before it hits the blades. By ‘predicting’ the wind, the wind turbine can optimize its position and adjust the blades so that the wind is used more efficiently, and the wind turbine lives longer.

Read more

• View Comments