Viable stretchable plasmonics based on unidirectional nanoprisms

Abstract

Well-defined ordered arrays of plasmonic nanostructures were fabricated on stretchable substrates and tunable plasmon-coupling-based sensing properties were comprehensively demonstrated upon extension and contraction. Regular nanoprism patterns consisting of Ag, Au and Ag/Au bilayers were constructed on the stretchable polydimethylsiloxane substrate. The nanoprisms had the same orientation over the entire substrate (3 × 3 cm) via metal deposition on a single-crystal microparticle monolayer assembly. The plasmonic sensor based on the Ag/Au bilayer showed a 6-fold enhanced surface enhanced Raman scattering signal under 20% uniaxial extension, whereas a 3-fold increase was observed upon 6% contraction, compared with the Au nanoprism arrays. The sensory behaviors were corroborated by finite-difference time-domain simulation, demonstrating the tunable electromagnetic field enhancement effect via the localized surface plasmon resonance coupling. The advanced flexible plasmonic-coupling-based devices with tunable and quantifiable performance herein suggested are expected to unlock promising potential in practical bio-sensing, biotechnological applications and optical devices.

A Transformative Metasurface Based on Zerogap Embedded Template

“…Therefore, many types of structures including phased arrays, plasmonic gaps, and Mie resonators have been demonstrated on flexible substrates. [ 18–20 ]…”

Flexible Surface‐Enhanced Raman Scattering Substrates: A Review on Constructions, Applications, and Challenges

“…The other is that the gap distance of the surface interparticle can be tuned easily, providing the possibility for the label‐free detection of bio‐macromolecules by controlling active gap distance. [ 59–61 ]…”

Rapid field trace detection of pesticide residue in food based on surface-enhanced Raman spectroscopy

“…Advantages of this system are that a certain phase can be used as a stable Fig. 3 Schematic illustration of current various types of substrates for SERS detection [25,39,[105][106][107][108][109][110][111][112][113] internal standard to improve signal accuracy and realize the multiple detections of pesticides from two liquid phases [114]. While for solid substrate, achieving reasonable control of the distribution of hot spots and the location of target molecules is easy to come true, consequently exhibiting an elevated reproducibility.…”

“…Some new emerging types of substrate place emphasis on actual application, such as flexible substrate [105], tunable substrate [106], self-cleaning substrate [107], and other specific functional substrate (Fig. 3).…”