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Scientists eye insects to make better solar cells 0 replies,112 views

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Scientists from Penn State University blowfly eyes was inspired to improve the efficiency of the next generation of solar cells. The group is studying the use of flies in the cornea to create a biomimetic surface or mimic the surface properties of biological tissue. These surfaces can be used for a variety of applications, including solar cells. Blowfly compound eyes shaped like a hemisphere, in the compound eye of the hemispherical inner surface covered with nano-scale features of the hexagonal eyes. Photos from Pennsylvania State University Ashlesh Lakhtakia, according to the researchers revealed that the eyes of blowfly can be used for the manufacture of solar cells. The compound eyes of flies was hemispherical, hemispherical compound eyes of the inner surface is covered with hexagonal nano-function eyes. Godfrey Binder Professor of Engineering Science and Mechanics Akhlesha Lakhtakia, said: These eyes are used in the manufacture of solar cells on the perfect material, because they collect more from a larger area of the sun, not just fall on a plane light. However, the surface must be fine enough to keep the overall design in order to successfully manufacture the product. Therefore, Lakhtakia and his colleagues to develop a plan to create a function to retain the nano-giant mold. Researchers in nine eyes blowfly array of 250 nm nickel coating applied, fixed on a glass substrate and the cornea at the bottom to fill the poly dimethyl siloxane of a silicon-based organic polymer, so that Ni will not leak from behind the eyes. Then, they use thermal evaporation in a vacuum chamber to form the coating material, the deposition of nickel on the surface. Object receiving the coating attached to a rack, this rack will rotate once every two seconds. This process will create a 50 mm thick master template that can be used as a mold or copy the pattern shown in Figure Chapter mold. Scientists, the main goal is to use a template to further production of other molds and mold, and the template attached to the large areas of tile template. The group will expand its template to contain thirty blowfly corneas. Once they have enough templates, and make it tiled together, this will create a greater surface to for the manufacture of solar cells.
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