Quasi-3D Plasmonic Metamaterials with Highly Stretch-Tunable Optical Responses.

ABSTRACT: Three-dimensional (3D) assemblies of metal nanoparticles (NPs) exhibiting strong plasmonic responses have garnered significant interest owing to their potential in optoelectronic and sensing applications. However, the realization of active plasmonic metamaterials based on such architectures remains nontrivial, particularly in achieving uniform and sub-10 nm interparticle spacing within dynamically tunable media. Here, we present mechanically reconfigurable plasmonic nanocomposites composed of 3D stacked liquid gallium nanoparticles (GaNPs) embedded in a polydimethylsiloxane (PDMS) matrix, fabricated through a single-step Ga evaporation process. The resulting GaNPs/PDMS nanocomposites exhibit multilayered NP architectures with narrow interparticle spacing that can act as quasi-3D plasmonic

SUBMITTER: Chen IC 

PROVIDER: S-EPMC12903114 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature