Flexible Plasmonic Metasurfaces with User‐Designed Patterns for Molecular Sensing and Cryptography

Abstract

Flexible plasmonic metasurfaces have garnered considerable attention because the material's mechanical fl exibility enables new functionalities and integrated applications. Here, by adopting low-cost materials and simple techniques, we demonstrate a method of fabricating large fl exible metasurfaces with arbitrary user-designed iridescent patterns. These naked-eye recognizable patterns together with their excellent plasmonic activities have yielded new functionalities and novel applications. Demonstrations include plasmonic sensing, refl ective displays, developing new encryption strategies and integrated devices, etc. Moreover, the low fabrication cost (<US$ 0.03 cm −2 ) would enable the practical use of the material. The metasurface can even be fashioned into an innovative, multifunctional medical ID bracelet. We believe our fl exible plasmonic metafi lm will inspire the fabrication of many novel applications and open up new horizons in various fi elds.

Photoluminescence Tuning in Stretchable PDMS Film Grafted Doped Core/Multishell Quantum Dots for Anticounterfeiting

“…Such a luminescence material can demonstrate potential application for anticounterfeiting labels; however, it is intrinsically different from an anticounterfeiting feature relying on photoluminescence from the rare‐earth‐doped luminescence materials . Moreover, the integration of luminescence materials on stretchable substrates currently becomes an extensively investigated topic because they offer the characteristics of luminescence properties and the ability to be stretched into arbitrary shapes . Nowadays, the most studied stretchable devices are applied in artificial intelligence, artificial human skin, semiconductor device, and sensor .…”

Draw‐Spinning of Kilometer‐Long and Highly Stretchable Polymer Submicrometer Fibers

“…SEM images of the perfectly aligned PEO fibers with different spacings (6, 12, and 18 µm) are shown in Figure D. Another proof for the recurring structures is the structural colors caused by the diffraction grating effect . This result also shows the potential of the method in coating (Figures S5 and S6, Supporting Information).…”

Functional Micro–Nano Structure with Variable Colour: Applications for Anti-Counterfeiting

“…Huge coding capacity could be achieved by adjusting barcodes and choices of Raman dyes. e simple, low-cost, and efficient approach to fabricate a flexible plasmonic material displayed tunable plasmonic properties and excellent flexibility for anti-counterfeiting applications [195]. Kang et al [196] fabricated multiwavelength thermoplasmonic images by inkjet printing nanoparticle inks of gold nanorod (GNR) and gold nanosphere (GNS), the thermoplasmonic metal nanoparticles could generate localized heat to enhanced light absorption at a particular wavelength by localized surface plasmons, so patterns that are difficult to distinguish with the naked eye could be visible by thermal imaging infrared cameras.…”