Colors can be obtained through innumerable techniques. The finest way is through pigments but the glowing or thick colors like that similar to peacock feathers are not easy to produce. There is but one promising solution introduced through nanostructures that results to overlapping of light structures. It will lead to production of extraordinary and dynamic color effect.
The study has been done by the researchers from Kalsruhe Institute of Technology or KIT, in association with its international team members, who have now succeeded in replicating nanostructures that produce the same type of color irrespective of from which angle it they have been viewed.
In contrast to the pigments, the structural colors obtained through this process are non-toxic, vibrant, dynamic and durable. In industrial production, but, they have a limitation of being robustly iridescent that implies that the color obtained depends on the angle from which it is viewed. An example of this is the rear side of the CD. Therefore, such colors cannot be utilized for all the applications. Bright colors from animals, by contrast, are often independent of the angle they have to be viewed. Feathers from the kingfisher always seems blue, no matter from which side we view them.
The primary reason for this rests in the nanostructures. While simple structures are amorphous, iridescent or irregular shapes that always produce the same sort of color. Yet, in the industry can only generate regular nanostructures in an economically effective manner.
Radwanul Hasan Siddique, a scientist at KIT in association with researchers from Belgium and USA has now identified that the blue tarantula does not showcase iridescence in spite of regular structures on its hairs. Foremost, their study disclosed that the hairs are multi-layered and possess flower-like structure. Also, the researchers analyzed its reflection behavior with the aid of computer movements.
Correspondingly, they created models of such structures utilizing nano 3-D printers and optimized the models with the aid of the simulations.
In the end of this, they produced a structure similar to that of a flower that releases the same color over different viewing angle of 160 degrees. It is the largest viewing angle of any synthetic color reached till date.
The size of the flower obtained from the resulting color can be modified that makes this coloring technique interesting for the industry. “It could be a core step towards a future where structural colorants substitute the toxic pigments presently employed in textile, cosmetic and packaging industries,” says RadwanulHasanSiddique from KIT’s Institute of Microstructure Technology.
Also the team thinks that the scalability of the 3D-nano printing is the greatest limitation on the path towards industrial use. Only some of the entities would be able to produce such prints.
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