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Method for preparing tapered fiber-optic SERS probe by laser-induced one-step pulling method

A tapered fiber, laser-induced technology, used in Raman scattering, material excitation analysis, material analysis by optical means, etc., can solve problems such as the preparation of tapered fiber SERS probes that are not suitable, and ensure the repeatability of preparation. , The effect of simple operation and high SERS detection sensitivity

Active Publication Date: 2021-07-27
DONGGUAN UNIV OF TECH
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Problems solved by technology

However, these methods are currently mainly used for the preparation of flat-end fiber SERS probes, and are not suitable for the preparation of tapered fiber SERS probes.

Method used

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  • Method for preparing tapered fiber-optic SERS probe by laser-induced one-step pulling method
  • Method for preparing tapered fiber-optic SERS probe by laser-induced one-step pulling method
  • Method for preparing tapered fiber-optic SERS probe by laser-induced one-step pulling method

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Embodiment Construction

[0021] Such as figure 1 As shown, a method for preparing a tapered optical fiber SERS probe by a laser-induced one-step pulling method includes a laser 1, a tapered optical fiber 2, a noble metal nanoparticle sol 3 and a one-dimensional precision displacement platform 4. The tapered optical fiber One end of 2 is a flat end, and the other end is a tapered end. The flat end of the tapered optical fiber 2 is welded to the output pigtail of the laser 1, and the tapered end is inserted into the pre-prepared noble metal nanoparticle sol 3. The middle part of the tapered optical fiber Fixed on the moving end of the one-dimensional precision displacement platform 4; turn on the laser 1, and under the irradiation of the induced laser, use the one-dimensional precision displacement platform 4 to slowly pull the tapered end of the optical fiber from the noble metal nanoparticle sol 3 to the tapered end. The cone tip is located near the upper surface interface of the noble metal nanoparti...

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Abstract

The invention discloses a method for preparing a tapered optical fiber SERS probe by a laser-induced one-step pulling method. The flat end of the optical fiber is welded to the laser output pigtail, and the tapered end is inserted into the pre-prepared metal nanoparticle sol; the laser light source is turned on , under the irradiation of induced laser, the fiber cone is slowly pulled from the sol by using a one-dimensional precision displacement platform until the tip of the cone is just completely exposed to the liquid surface; the fiber cone is dried for a short time by using the induced laser, the solvent evaporates rapidly, and the nanoparticles Adsorbed on the fiber cone to form a fiber SERS probe. The invention has the advantages of low cost and simple operation, and the tapered fiber SERS probe prepared by the method is expected to achieve a larger Raman interaction area and better detection sensitivity compared with a flat-end fiber SERS probe and repeatability, which is conducive to promoting the practical process of fiber optic SERS probes, and has important application prospects in the field of in vivo, online, in situ, and remote detection of Raman spectroscopy.

Description

technical field [0001] The invention relates to the technical field of surface-enhanced Raman scattering spectroscopy, in particular to a method for preparing a tapered optical fiber SERS probe by a laser-induced one-step pulling method. Background technique [0002] Surface-enhanced Raman scattering (Surface Enhanced Raman Scattering, SERS) is a Raman spectroscopy enhancement technology developed in recent years, which uses the Localized Surface Plasmon Resonance (LSPR) effect of noble metal nanoparticles to Achieving great enhancement of Raman signal, the enhancement factor can be as high as 10 8 -10 12 , has attracted extensive attention from scientists. Combining optical fiber sensing technology with SERS technology, the optical fiber SERS probe formed by preparing noble metal nanoparticles or structures on the surface of the optical fiber has the advantages of low cost, good spectral repeatability, compact structure, and strong anti-interference ability, and is expect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65G01N21/01
CPCG01N21/01G01N21/658G01N2021/656
Inventor 周飞刘晔凌东雄王红成
Owner DONGGUAN UNIV OF TECH
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