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Preparation method of surface enhanced Raman substrate (SERS)

A surface-enhanced Raman and surface-enhanced technology, applied in the field of molecular spectroscopy analysis and detection, can solve problems such as failure to achieve enhancement effect, attenuation of SERS substrate enhancement effect, waste of silver metal substrate material, etc., achieving low cost, promoting homeland security, The effect of short production cycle

Inactive Publication Date: 2014-05-07
胡建明
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Problems solved by technology

However, after long-term storage of the substrate grown with nano-silver particles, an oxide film will be formed on the surface of the nano-silver particles, and the surface properties of the oxidized nano-silver particles will change, making the SERS substrate enhancement effect attenuate more obviously, usually in about two days. Undesired enhancement; results in wasted silver metal and substrate material

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  • Preparation method of surface enhanced Raman substrate (SERS)

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Embodiment Construction

[0022] The preparation method of the surface-enhanced Raman substrate of this embodiment comprises the following steps:

[0023] a. Attach nano-silver particle surface reinforcement layer 3 on the base layer 1 surface to form a surface-enhanced Raman substrate; the base layer is the base layer for forming the base, and the base layer 1 can adopt any disclosed base layer in the prior art, including organic materials, etc.;

[0024] b. Preserving the surface-enhanced Raman substrate formed in step a in an inert gas.

[0025] Certainly, when performing step a, it is necessary to perform necessary cleaning on the base layer 1 to ensure the adhesion effect.

[0026] In this embodiment, in step a, firstly, a superhydrophobic structure 2 is formed on the surface of the base layer 1, and the nano-silver particle surface enhancement layer 3 is attached to the surface of the superhydrophobic structure; it can be formed by direct surface treatment or by adding a superhydrophobic film ...

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Abstract

The invention discloses a preparation method of surface enhanced Raman substrate (SERS). The preparation method comprises the following steps: step a, forming a surface enhanced Raman substrate (SERS) on a surface enhanced layer formed by attaching nano silver particles on a basic layer; step b, preserving the surface enhanced Raman substrate (SERS) formed in the step a in the protection of inert gas. Because the nano silver particle substrate is preserved in the protection of nitrogen gas, the surface will not be oxidized after a long period, thus the substrate, which has been preserved for a long time, still has a very good enhancing effect when the substrate is applied to an SERS substrate. The SERS has ultrahigh analysis sensitivity, is suitable for the detection of ultra-trace samples, has the advantages of simple preparation, short production time, low cost, and suitability for batch production, and provides conditions for promoting the SERS technology to be used in the fields of national security, environmental supervision, food safety, medical treatment and public health, and the like.

Description

technical field [0001] The invention relates to the field of molecular spectrum analysis and detection, in particular to a substrate for surface-enhanced Raman scattering and a preparation method thereof. Background technique [0002] When light is irradiated on the material, elastic scattering and inelastic scattering occur. The scattered light of elastic scattering has the same wavelength as the excitation light, and the scattered light of inelastic scattering has components longer and shorter than the wavelength of excitation light, which is called Raman effect, the obtained spectrum is called Raman spectrum. Raman spectroscopy belongs to molecular vibration spectroscopy, which is the fingerprint of material molecules. Raman spectrometers made according to the Raman effect can be used to accurately and qualitatively identify samples. The analysis method of Raman spectroscopy generally does not require pretreatment of samples, and is easy to operate during the analysis pr...

Claims

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Application Information

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IPC IPC(8): G01N21/65B81C1/00
Inventor 胡建明崔玉亭杨盼孙旭平
Owner 胡建明
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