A Reliable And Disposable Optical Fiber Sers Substrate

Surface-enhanced Raman Scattering (SERS) is typically observed with the substrate in a liquid medium and it has been proposed as a promising technique for detecting low levels of pollutants in liquids. A technique is presented for self-assembly to immobilize Ag nanoparticles (Ag-NPs), with diameters ranging from 100 to 800nm on quartz plates and end surface of optical fibers. Rhodamine 6G (R6G) were measured respectively using this quartz plates SERS substrate and optical fiber SERS substrate combined with portable Raman spectrometer. The result shows that the optical fiber SERS substrates are much reliable and convenient than quartz plates SERS substrates. Our proposed fabrication on optical fibers offers a rapid, cheap and disposable trace detection capability for toxic materials in the field.