Cross‐Wavelength Hierarchical Metamaterials Enabled for Trans‐Scale Molecules Detection Simultaneously

Advanced Science

卷:9

Yingli Wang¹  Lijuan Xie¹  Chan Ma¹  Xiangjiang Liu¹  Benhui Dai¹  Xuan Luo¹  Yibin Ying¹  Qi Zhang²  Kang Huang³ 

[1] College of Biosystems Engineering and Food Science Zhejiang University Hangzhou 310058 China;

[2] Department of Physics Nanjing University Nanjing 210008 China;

[3] School of Chemical Sciences The University of Auckland Auckland 1142 New Zealand;

关键词: metamaterials;    molecular;    SERS;    smart sensory packaging;    THz;   

DOI  :  10.1002/advs.202105447

来源: DOAJ

【 摘 要 】

Abstract Metamaterials have attracted increasing attention in sensing applications. However, the critical feature sizes of meta‐atom span several orders of magnitude in length scale, almost all the metamaterials are designed to operate at limited bands. It is challenging for a single type of meta‐atom with ultra‐broadband adaptability. Inspired by the natural hierarchical architectures, herein, the authors introduce a new constructing scheme of cross‐wavelength hierarchical metamaterials with a single type of meta‐atom that can realize enhancement of terahertz (THz) resonance and surface‐enhanced Raman scattering (SERS) at the same time. By combining multiple subwavelength structures at different hierarchical levels into a single meta‐atom, the obtained metamaterial can operate in two frequencies and realize multiple functionalities. Armed with this hierarchical metamaterial, detecting analytes as small as sub‐nanoscale chemical molecules or as big as microscale biomolecules simultaneously can be realized in one single metamaterial for the first time. As a proof‐of‐concept example, a smart sensory packaging is developed, which allowed them to real‐time monitor the kinetic growth of pathogenic bacteria and their metabolites in food without opening the packaging. They believe that their work will provide a valuable example that satisfies the unmet need for multiscale functional meta‐devices.

【 授权许可】

Unknown