Ferroelectric-assisted gold nanoparticles array for centimeter-scale highly reproducible SERS substrates.

ABSTRACT: Assemble metal nanoparticles into various ordered structures with scale up to centimeter area is required to meet diverse needs of lab-on-a-chips and analytic components. Here, we present the uniform and high-yield fabrication of centimeter-scale gold nanoparticles (AuNPs) array for SERS substrates. Ferroelectric-assisted assembly of AuNPs line array is successfully fabricated by using a periodically poled LiNbO₃ (PPLN) single crystal as a template. SNOM-Raman shows that the uniform assembly of AuNPs exhibits a high density of "hot spots" arising from strong electromagnetic (EM) field coupling induced by adjacent AuNPs. Quantitative analysis based on SERS detection describes an excellent reproducibility with an intensity variation less than 7% at 1649 cm^-1 of Rhodamin

SUBMITTER: Liu X 

PROVIDER: S-EPMC5472578 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature