Porous MgF₂-over-gold nanoparticles (MON) as plasmonic substrate for analytical applications

Abstract

Porous MgF2-over-nanoparticles (MON) surfaces are fabricated from immobilized gold nanoparticles of different sizes on a glass surface by coating them with a magnesium fluoride layer, resulting in favorable optical and mechanical properties.

Sandwiching analytes with structurally diverse plasmonic nanoparticles on paper substrates for surface enhanced Raman spectroscopy

“…S2 †). [42][43][44][45][46][47] These phenomena have been explained by the formation of small gaps between adjacent particles to induce interparticle plasmonic coupling whose spacing governs the degree of the wavelength shi. Specically, the silver plasmonic paper displayed one intense peak at 400 nm and a small band at 700 nm where the latter peak might arise from the strongly induced NP interactions in the large areas of randomly aggregated AgNPs.…”

SERS-based immunoassay on a plasmonic syringe filter for improved sampling and labeling efficiency of biomarkers

“…Although the absorption measurement on a 2-D substrate is challenging due to the measurement conditions involving a strong absorber paper material, 51,52 the absorption pattern of the plasmonic paper clearly indicated the presence of a certain degree of locally aggregated AuNPs to induce plasmonic coupling. [53][54][55] Dynamic light scattering (DLS) and UV-vis extinction spectrophotometry were used to characterize the synthesized ERLs. Fig.…”

Highly Sensitive Twin Resonance Coupling Refractive Index Sensor Based on Gold- and MgF2-Coated Nano Metal Films

“…In the same way, MgF has been deposited at the inner side of the fiber. For example, a Au–MgF -coated nanostructure is briefly described experimentally in [ 55 ] by varying the layer size and parameters. Additionally in the case of fabrication, some SPR-based optical fiber sensors with Ag–Tio -coated [ 56 ], Au-coated [ 57 , 58 , 59 ], and MgF /TiO -coated optical filter [ 60 ] are experimentally demonstrated.…”