Controlling successive ionic layer absorption and reaction cycles to optimize silver nanoparticle-induced localized surface plasmon resonance effects on the paper strip.

摘要: Abstract This study investigates why a silver nanoparticle (SNP)-induced surface-enhanced Raman scattering (SERS) paper chip fabricated at low successive ionic layer absorption and reaction (SILAR) cycles leads to high SERS enhancement factor (7 × 10 8 ) with an inferior nanostructure without generating hot spot effect. The multi-layered structure of SNPs on cellulose fibers, verified by magnified scanning electron microscopy (SEM) analyzed computational simulation method, was hypothesized as the reason. pattern simulated local electric field distribution respect number SILAR showed good agreement experimental intensity, regardless wavelength excitation laser sources. 785-nm source (2.8 × 10 9 2.5 times greater than (1.1 × 10 ). A 532-nm exhibited highest maximum intensity (1.9 × 10 11 ), particularly interparticle gap called spot. short led strong caused electromagnetic coupling arising from SNP-induced surface plasmon resonance (LSPR) effects through energy. These findings suggest that our paper-based SILAR-fabricated LSPR model is valid for understanding effects.