Auxetics-Inspired Tunable Metamaterials for Magnetic Resonance Imaging.

ABSTRACT: Auxetics refers to structures or materials with a negative Poisson's ratio, thereby capable of exhibiting counterintuitive behaviors. Herein, auxetic structures are exploited to design mechanically tunable metamaterials in both planar and hemispherical configurations operating at megahertz (MHz) frequencies, optimized for their application to magnetic resonance imaging (MRI). Specially, the reported tunable metamaterials are composed of arrays of interjointed unit cells featuring metallic helices, enabling auxetic patterns with a negative Poisson's ratio. The deployable deformation of the metamaterials yields an added degree of freedom with respect to frequency tunability through the resultant modification of the electromagnetic interactions between unit cells. The metamaterials are fabric

SUBMITTER: Wu K 

PROVIDER: S-EPMC8831474 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature