Micro-scale graded mechanical metamaterials exhibiting versatile Poisson’s ratio

The ability to control Poisson's ratio of functional materials has been one the main objectives researchers attempting develop structures efficient from perspective protective, biomedical and soundproofing devices. This task becomes even more challenging at small scales, such as microscale, where possibility mechanical properties is very significant, like in case flexible electronics. In this work, we propose novel microscopic 2D 3D functionally-graded metamaterials capable exhibiting a broad range depending on their composition. More specifically, show that upon adjusting number structural elements corresponding type substructure expense another, it possible change resultant entire system highly positive negative values well achieve arbitrary intermediate values. Finally, addition static properties, also analyze dynamic these structures. Namely, how variation composition considered affects velocity wave propagating through system. This, turn, could be essential applications utilizing localized attenuation or sensors.