Silver film over nanospheres (AgFoN) as tri-modal plasmonic sensing platform for Surface Plasmon Resonance Spectroscopy, Surface-Enhanced Raman Scattering, and Surface-Enhanced Fluorescence

Experimentally evaluating plasmonic sensing performance of silver film over nanosphere surface (AgFON)

“…In general, absorption spectra of metal film over nanosphere surface (MFON) nanostructures can be calculated using the formula, A=1-T-R (where A, T and R stands for absorption, transmission and reflection respectively). A recent study [17] shows that the reflection minimum almost matches the absorption maximum of AgFON i.e., the reflection and absorption spectra are complementary to each other. The absorption spectra of AgFON were shown in figure 4(b).…”

“…Nanosphere lithography technique is a convective self-assembly technique in which colloidal nanospheres arrange themselves in hexagonal close-packed structure which is used as a template for subsequent process of two different types of periodic nanostructures i.e., metal film over nanosphere surface (MFON) [15] and triangular nanoparticles [16] . In the past few decades, MFON structures are explored for SERS applications [17][18][19][20] owing to its high stability and excitation of localized cavity mode plasmon in its periodic V-shaped cavities. But recently, the use of MFON structures in plasmonic smartphone sensors [21] and refractive indexbased sensors [22], have revived their potential for sensing applications.…”

Magneto-plasmonic bionanocomposites for on-site SERS detection of water contaminants

“…Similar findings have been previously reported for RB molecules adsorbed on the surface of Au nanorods, Au nanospheres and Ag films. 48,53,54…”

“…Similar findings have been previously reported for RB molecules adsorbed on the surface of Au nanorods, Au nanospheres and Ag films. 48,53,54 A comparative analysis of the SERS performance of the two bionanocomposite substrates, while indicating that both magneto-plasmonic nanostructures can be explored as Raman amplifiers for sensing devices, the ex situ sample showed better performance (see Fig. S7 †).…”

Assembly of bimetallic (Au–Ag)FON composite films at liquid/solid interfaces and their tunable optical properties

“…72 The silver film over nanosphere (AgFON) surface provides maximum enhancement in the visible wavelength range owing to its LSPR, 73,74 while gold FON (AuFON) surfaces have also been evaluated as potential candidates for improving surface stability. [75][76][77] The 2D-structured Au-Ag composite materials, due to their highly uniform nanostructures and each Au-Ag particle interact with the near-field of a large number of the surrounding Au-Ag particles, could demonstrate excellent enhanced properties such as the strong light diffraction, plasmonic coupling and synergistic effects. 44 Thus, for bimetallic (Au-Ag)FON composite film, their wavelength shift of LSPR can be regulated by changing of their size, uniformity, shape and composition (Au/Ag ratio).…”