Functionalization of Microstructured Optical Fibers by Internal Nanoparticle Mono-Layers for Plasmonic Biosensor Applications

Lab on Fiber Technology for biological sensing applications

“…Specifically, it is difficult to cover the internal surface of the PCF tiny holes with uniform metal films due to their small diameter. The only exception is constituted by a few studies performed on the suspended core PCFs in which the three holes, composing the microstructured cladding, was successfully covered by Ag NPs for local SPR excitation .…”

Multiplexed localized surface plasmon resonance sensing with suspended core fibers

“…This technique is based on the use of binding molecules, which are designed to bind with one end on the silica surface and with the other end on the metallic nanoparticle. With this method it is possible to cover the inner surfaces of fibers even with rather long lengths (lengths of 6 m have been reported in [3]) with homogenous monolayer films.…”

“…With such channels, the microstructured optical fiber can be used as a closed fluidic system with sensing function. First investigations demonstrated the homogeneous nanoparticle deposition within a three channel suspended core fiber with 6 m length [2,3].…”

Enhancement of Raman scattering by field superposition of rough submicrometer silver particles

“…Enhancement of Raman scattering by field superposition of rough submicrometer silver particles Feng Zhang, 1 Ping Chen, 1,a) Lei Zhang, 1 Song-Cheng Mao, 1 Lie Lin, 1 Yu-Guo Tang, 2 Ji-Cheng Cui, 2 Xiang-Dong Qi, 2 Jun-Hong Yang, 3 Wavelength-dependent surface-enhanced Raman spectra of methylene blue adsorbed on rough submicrometer silver particles were measured. Results revealed a high enhancement factor (10 5 $ 10 7 ), especially in the long-wavelength region.…”

“…Through analyzing the plasmon resonance modes and the superposition of radiation fields, we found that the rough surface-induced field superposition results in the redistribution of optical fields around the particle, which becomes a key factor responsible for the high enhancement effect of metal particles. [1][2][3][4] These metal particles show distinctive optical properties in the visible and near-infrared region, 5 which are attributed to collective oscillations of the conduction electrons, known as the localized surface plasmon (LSP). [6][7][8] The LSP resonance frequencies of metal particles rely on their size, shape, composition, and surrounding medium.…”