We often hear of new technological improvements - robots, gadgets, phones, vehicles, medicine and many more, but these are just part of the picture of scientific achievement. No less important is the field of chemical engineering, which has invented some amazing materials in recent years - materials that may change our lives forever. These are 7 of the most fascinating and powerful materials science has come up with in recent years:
Metamaterials are artificial materials engineered to have properties that may not be found in nature. They are assemblies of multiple individual elements fashioned from conventional microscopic materials, such as metals or plastics, but the materials are usually arranged in periodic patterns. Metamaterials don't gain their properties from their composition, but from their exactingly-designed structures. Their precise shape, geometry, size, orientation and arrangement can affect waves of light or sound in an unconventional manner, creating material properties that cannot be achieved using conventional materials. These metamaterials achieve the desired effects by incorporating structural elements of sub-wavelength sizes, i.e. features that are actually smaller than the wavelength of the waves they affect. The primary research into metamaterials investigates materials with a negative refractive index. Negative refractive index materials appear to permit the creation of superlenses, which can have a spatial resolution below that of the wavelength. In other words, it makes invisibility cloaks. |
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