Graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor and preparation method thereof

A graphene film and sensor technology, applied in the fields of optical engineering, fiber optics, and materials engineering, can solve the problems of low detection sensitivity of SPR structure, easy oxidation of silver film, etc., and achieve good chemical stability, compact structure, and high sensitivity. The effect of sensitivity

Inactive Publication Date: 2012-08-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem that the silver film is easily oxidized in the prior art and causes the detection sensitivity of its SPR structure to decrease

Method used

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  • Graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor and preparation method thereof
  • Graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor and preparation method thereof
  • Graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor and preparation method thereof

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Embodiment

[0026] Such as figure 1 and figure 2 Shown, a kind of preparation method of the D-type optical fiber SPR sensor based on graphene film sensitization:

[0027] First prepare the D-type optical fiber: grind the middle section of the ordinary multimode optical fiber from the side, the grinding length is 1-3 cm, the depth of the D-shaped groove is equal to the radius length of the optical fiber, so that the bottom of the grinding groove is smooth and smooth, and the smoothness is maintained at 1A. Of course, it can also be prepared according to other existing methods.

[0028] Then a silver film layer is prepared on the polished surface of the D-type optical fiber; a metal silver film layer of about 50 nanometers is plated on the bottom of the D-type optical fiber groove by a chemical deposition reduction method.

[0029] Finally, on the surface of the metal silver film layer, a CVD method (chemical vapor deposition method) is used to grow a graphene film layer with a thickness...

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Abstract

The invention discloses a graphene film sensitized D-shaped optical fiber surface plasmon resonance (SPR) sensor. The sensor comprises a D-shaped optical fiber, wherein a silver film layer is arranged on the polished surface of the D-shaped optical fiber; and a graphene film layer is arranged on the surface of the silver film layer. A preparation method comprises the following steps of: (1) preparing the D-shaped optical fiber, and preparing the silver film layer on the polished surface of the D-shaped optical fiber; and (2) preparing the graphene film layer on the surface of the silver film layer. The D-shaped optical fiber is used as a light transmission medium, an SPR structure is formed by plating a silver film on the surface of the D-shaped optical fiber, the sensitivity of the SPR sensing structure is increased by depositing or growing a graphene film material on the surface of the silver film, and the sensor has the prominent advantages of small volume, light weight, high sensitivity, quick response and the like, and has wide application prospects in the aspect of detecting trace gas, liquid, chemical elements, deoxyribonucleic acid (DNA) and the like in the fields of biology, chemistry, medicine and the like.

Description

technical field [0001] The invention relates to the technical fields of material engineering, optical engineering and optical fiber optics, in particular to a graphene film-sensitized D-type optical fiber SPR sensor and a preparation method thereof. Background technique [0002] In the late 1970s, fiber optic sensing began to develop and became an optical detection technology. It uses the changes in the intensity, phase, and polarization of light in the medium to detect a series of physical and chemical quantities such as temperature, pressure, and concentration. It has the advantages of high sensitivity, fast response, anti-electromagnetic interference, and strong corrosion resistance. It has been widely used in many aspects such as industry, scientific research, environment, medical treatment, and military affairs. It has broad application potential and development. prospect. [0003] The development of optical fiber sensing technology is accompanied by the development of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/55G01N21/552
Inventor 吴宇饶云江姚佰承
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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