пятница, 27 января 2012 г.

Glowing trees could replace street lights

Glowing trees could replace street lights Glowing trees may replace street lights

A bright golden light of street lamps can be replaced in the near future on a fluorescent green light from the leaves. Scientists from Academia Sinica (Academia Sinica) and the National University of Cheng Kung (National Cheng Kung University), located in the cities of Taipei and Tainan (Taiwan, China) was implanted in the plant leaves glowing gold nanoparticles, similar in shape to sea urchins, known as "Bio-emitting diodes."


The new nanoparticles could replace electric lighting of the streets "biological light" and will help to ensure that carbon dioxide is absorbed by 24 hours a day.


"In the future, with the help of bio-LED roadside trees can provide enough light to illuminate the streets at night" - the researchers say. "It will reduce energy consumption, plus everything is absorbed by carbon dioxide, since the bio-luminescence light-emitting diodes, as in ordinary sunlight, plants will photosynthesize (ie, to form organic compounds from carbon dioxide and water)."


Glowing trees could replace street lights
Chlorophyll, the green pigment that determine color of chloroplasts in green plants, and with the participation of which the photosynthesis is known for its ability to absorb light of a certain range. However, under certain conditions, such as the presence of violet light, chlorophyll can give yourself glow. If the pigment is affected by light with a wavelength of about 400 nanometers, usually green chlorophyll begins to "glow" red. Violet light achieved quite difficult, especially at night when illuminated leaves will need drivers and pedestrians. Scientists needed a source of violet light, which was found in nanoparticles of gold.


When short wavelengths of light invisible to the eye, working on gold nanoparticles, they begin to glow violet light. This violet light has an effect on the chlorophyll molecule, excites them and begins to exude pigment red light.


Scientists believe that the bio-LEDs will give enough light to the streets in the city are bright at night, as usual with us a night light. They can safely replace electric and gas lights.


Today, however, scientists have not yet completed work on the experiments in this field, and the glowing plants can be seen only in laboratories, such as aquatic plant Bacopa caroliniana.


"To be able to talk about the land plants that grow in the streets, further research is needed - says Krishanu Ray (Krishanu Ray), a scientist from the University of Maryland (University of Maryland), College Park. "In the near future can be seen glowing in the dark trees, but there is still a lot of work."



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