Hello dear readers, we've had this very neglected area, but we are again returning to it to keep them aware of interesting and mostly new discoveries. We just leave our Expociencia 2010 here in the city of Xalapa, which we will be giving details in the next inning, they get a little talk about the winning projects at the Expo Science International and the National Expociencia!
Without further ado the I leave you with this note that I became very interesting because we are trying to copy what nature does to improve our processes alone, in this case the capture of sunlight.
One problem with the collection of sunlight is that the sun's rays can be very destructive to many materials. Sunlight causes a gradual deterioration of many systems developed to capture and use of that light. In contrast, plants have taken a very interesting strategy to solve this problem: Time and again break the molecules they use to capture light and remade from scratch, so that the basic structures to capture energy solar are, in fact, always new. A full sun on a summer day, each leaf of a tree recycles its proteins approximately every 45 minutes.
That process has now been imitated by the team of Michael Strano, professor of chemical engineering. These researchers have developed an innovative set of self-assembling molecules and capable of converting sunlight into electricity. These molecules are disassembled and then reassembled quickly, as many times as you want. To do this, just add or remove a solution especial.El system produced by Strano's team consists of seven different compounds, including carbon nanotubes phospholipids and proteins that constitute the reaction centers. Under the right conditions, the components spontaneously assemble into a structure capable of capturing the light to current conversion eléctrica.Cuando a surfactant, similar in its fundamentals to chemicals that BP has been used in the Gulf of Mexico to break oil is added to the mix, the seven components separate and form a solution with a consistency similar to a soup. When the researchers removed the surfactant by passing the solution through a special membrane, the compounds are reassembled spontaneously into a perfectly structured photocell and also rejuvenated.
For more information visit: http://www.scitech-news.com/2010/09/solar-cell-heal-thyself.html
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