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Surface enhanced Raman scattering substrate constructed by electroless deposition and preparation method and application thereof

A surface-enhanced Raman and electroless deposition technology, which is applied in the fields of Raman spectroscopy, nanomaterial technology and analysis and detection, can solve the problems of restricting the development and application of SERS technology, difficulty in mass production, and easy pollution of the environment, and achieve high application Prospect and practical value, simple preparation process and high sensitivity

Inactive Publication Date: 2014-12-31
郝聚民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these substrates and their preparation have problems such as expensive equipment, complicated process, long time consumption, difficulty in mass production and easy pollution of the environment, and the existing substrates are difficult to balance various indicators such as sensitivity, reproducibility and stability.
These have become important factors limiting the further development and application of SERS technology

Method used

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  • Surface enhanced Raman scattering substrate constructed by electroless deposition and preparation method and application thereof
  • Surface enhanced Raman scattering substrate constructed by electroless deposition and preparation method and application thereof
  • Surface enhanced Raman scattering substrate constructed by electroless deposition and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Preparation of Silver Nanostructured Film SERS Substrate.

[0031] Three pretreated glass slides (10mm x 10mm) were placed in each well / well of a Falcon 6-well tissue culture plate (each well / well served as a reaction vessel). A freshly prepared 5mM / 2.5mM silver nitrate / butylamine solution in ethanol was added to each well / well. At different reaction times (0.5 to 40 hours) at room temperature, the glass sheets deposited with silver nanostructured films were taken out and rinsed thoroughly with ethanol, and then air-dried naturally to obtain a series of SERS substrates. Their nanostructures are as figure 1shown. It can be seen from the figure that with the prolongation of the reaction time, the silver nanostructured film transforms from a single layer of individually separated silver nanoparticles of small particles to a multilayer of silver nanoparticles of larger particles. The table below lists the sizes of silver nanoparticles formed at different react...

Embodiment 2

[0034] Example 2: Preparation of silver nanostructured film SERS substrate under other conditions.

[0035] The SERS substrate was prepared according to the same method as in Example 1, and the concentration of silver nitrate / butylamine in Example 1 was changed but the molar ratio was kept unchanged. In this example, a 1 mM / 0.5 mM silver nitrate / butylamine solution in ethanol was used. The silver nanostructured films exhibited a change in nanostructure characteristics similar to that of the SERS substrate prepared in Example 1: with the prolongation of the reaction time, from the individually isolated silver nanoparticle monolayer of small particles to the larger particle silver nanoparticle multilayer change. But the dendritic structures on the surface became less and smaller (figure omitted). Among them, the most sensitive SERS substrate was produced for 25h.

Embodiment 3

[0036] Example 3: Preparation of silver nanostructured film SERS substrate under other conditions.

[0037] The SERS substrate was prepared according to the same method as in Example 1, and the concentration of silver nitrate / butylamine in Example 1 was changed but the molar ratio was kept unchanged. In this example, a 10 mM / 5 mM silver nitrate / butylamine solution in ethanol was used. The silver nanostructured films exhibited a change in nanostructure characteristics similar to that of the SERS substrate prepared in Example 1: with the prolongation of the reaction time, from the individually isolated silver nanoparticle monolayer of small particles to the larger particle silver nanoparticle multilayer change. However, the dendritic structures on the surface are many and slightly larger (figure omitted). Among them, the most sensitive SERS substrate was produced for 6h of reaction.

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Abstract

The invention discloses a surface enhanced Raman scattering (SERS) technique based novel method for simple, rapid and low cost determination of perchlorate radicals in water and a preparation method of a key component SERS substrate. The method comprises the following steps: (1) construction and modification of the SERS substrate; (2) preparation of an SERS measurement sample; and (3) SERS measurement. According to appearance and strength of the characteristic SERS (930 cm<-1>) peak of the perchlorate radical ion, qualitative and quantitative information can be obtained. The SERS substrate provided by the method has excellent properties, including high sensitivity, good reproducibility, stable performance, reproducibility and reuse, etc. Combined with a portable or handheld Raman spectrometer, the method can realize on-site detection and analysis of trace perchlorate radical ions in water, and has very high application prospect and practical value.

Description

technical field [0001] The invention belongs to the technical fields of Raman spectroscopy, nanomaterials, and analysis and detection, and in particular relates to a surface-enhanced Raman scattering substrate constructed based on an electroless deposition method, and a preparation method and application thereof. Background technique [0002] Surface-enhanced Raman technology has developed rapidly since the discovery of surface-enhanced Raman scattering (SERS) in the 1970s. SERS technology is used in the identification and detection of chemical, biological and pharmaceutical molecules, especially in homeland security, food and drinking water testing and environmental monitoring are playing an increasingly important role. Recent studies have demonstrated that, combined with portable and palm-sized Raman spectrometers, this technology is emerging as a promising new solution for real-time and on-site analytical detection. [0003] The core of surface-enhanced Raman technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 郝聚民季平
Owner 郝聚民
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