Laser-induced self-assembly gold nanoparticles on the silanized surface of a tapered fiber and its application as a SERS probe

Abstract

Fiber surface-enhanced Raman scattering (SERS) probes have some advantages including flexibility, remote sensing capability, etc. In this paper, we proposed a new way of making fiber SERS probes. Desirable sizes of gold nanoparticles were absorbed on coated 3-aminopropyltrimethoxysilane (APTMS) surface of tapered fiber by laser. We studied the relationship between the light exposure time and the Raman intensity, and compared the Raman enhancement effects of probes made by different processes. The formed SERS probes have high repeatability and Raman activity. Its prepared time was much shorter, and the size of absorbed Au nanoparticles could be well arranged.