Plasmonic nanostructures with a negative Poisson ratio are demonstrated, having the unusual mechanical property of auxetics to expand laterally when being stretched. Using nanomembrane technology, auxetics are shrunk by orders of magnitude, giving simultaneous access to optical properties of plasmonic metamaterials, as well as auxetic mechanical properties on the nanoscale.

Meta-biomaterials offer a promising route towards the development of life-lasting implants. The concept aims to achieve solutions that are ordinarily impossible, by offering unique combination mechanical, mass transport, and biological properties through optimization their small-scale geometrical topological designs. In this study, we primarily focus on auxetic meta-biomaterials have extraordin...

Abstract Using a combination of finite element numerical simulation and experimental verification, the honeycomb structure with different parameters negative Poisson’s ratio is compressed at uniform speed. The influence angle parameter θ , size h thickness t on energy absorption whole studied, main factors influencing are discussed. results show that larger concave angle, smaller cell, better o...

Auxetic foams have previously been shown to benefits including higher indentation resistance than their conventional counterparts, due negative Poisson’s ratio, making them better at resisting penetration by concentrated loads. The ratio and Young’s modulus of auxetic open cell rarely measured the high compressive strain rates typical during impacts energy absorbing material in sporting protect...

We determine the Poisson ratio of self-avoiding fixed-connectivity membranes, modeled as impenetrable plaquettes, to be sigma = -0.37(6), in statistical agreement with the Poisson ratio of phantom fixed-connectivity membranes sigma = -0.32(4). Together with the equality of critical exponents, this result implies a unique universality class for fixed-connectivity membranes. Our findings thus est...

Auxetic structures possess a negative Poisson ratio (? < 0) as result of their geometrical configuration, which exhibits enhanced indentation resistance, fracture toughness, and impact well exceptional mechanical response advantages for applications in defense, biomedical, automotive, aerospace, sports, consumer goods, personal protective equipment sectors. With the advent additive manufactu...