Preparation method for sodium chloride assisted silver nano-particle self-assembled filter paper surface enhanced Raman spectrum base

A surface-enhanced Raman and silver nanoparticle technology, which is applied in Raman scattering, material excitation analysis, etc., can solve the problems of low sensitivity of silver nanoparticle SERS substrate and complicated manufacturing process, and achieve uniform signal response of the substrate and simple operation method , the effect of strong Raman signal

Inactive Publication Date: 2014-06-04
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low sensitivity and complex manufacturing process of the silver nanoparticle SERS substrate prepared by the existing method, and to provide a preparation method of sodium chloride-assisted silver nanoparticle self-assembled filter paper surface-enhanced Raman spectrum substrate

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  • Preparation method for sodium chloride assisted silver nano-particle self-assembled filter paper surface enhanced Raman spectrum base
  • Preparation method for sodium chloride assisted silver nano-particle self-assembled filter paper surface enhanced Raman spectrum base
  • Preparation method for sodium chloride assisted silver nano-particle self-assembled filter paper surface enhanced Raman spectrum base

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specific Embodiment approach 1

[0016] Embodiment 1: In this embodiment, the preparation method of sodium chloride-assisted silver nanoparticle self-assembled filter paper surface-enhanced Raman spectroscopy substrate is implemented according to the following steps:

[0017] 1. Dissolve 45-65 mg of silver nitrate in 250 ml of ultra-pure water and boil, then add 5-10 ml of sodium citrate solution with a mass concentration of 1%, boil for 1-1.5 hours, then cool naturally to room temperature to obtain silver sol;

[0018] 2. Cut the filter paper into filter paper sheets, then soak them in a sodium chloride solution with a concentration of 0.1 to 0.5 mol / L, take out the filter paper sheets and dry them to obtain dry filter paper sheets;

[0019] 3. Put the dried filter paper sheet into the silver sol in step 1, soak it for 12h-72h, take it out, and dry it at room temperature to obtain the NaCl-assisted silver nanoparticle self-assembled filter paper surface-enhanced Raman spectrum substrate.

[0020] The sodium ...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, 45 mg of silver nitrate is dissolved in 250 ml of ultrapure water and boiled, and then 5 ml of sodium citrate solution with a mass concentration of 1% is added. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0023] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the filter paper described in step 2 is a medium-speed quantitative filter paper. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

[0024] In this embodiment, the filter paper is cut into triangles, ovals or rectangles.

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Abstract

The invention provides a preparation method for a sodium chloride assisted silver nano-particle self-assembled filter paper surface enhanced Raman spectrum (SERS) base, and aims to solve the problems that the sensitivity of the silver nano-particle SERS base prepared by adopting an existing method is low and the manufacturing process is complicated. The preparation method comprises the following steps: 1, dissolving silver nitrate into ultrapure water and boiling; adding a sodium citrate solution to prepare silver sol; 2, immersing a filtering paper sheet in a sodium chloride solution; and airing the taken sheet; and 3, immersing the filtering paper sheet in the silver sol; and airing the taken sheet to finish the preparation of the surface enhanced Raman spectrum base. The surface enhanced Raman spectrum base provided by the invention can be used for rapidly detecting substances with the concentration in a ppb magnitude order and is high in sensitivity; the Raman spectrum base is simple and convenient to operate and low in cost; the prepared base can be applied to the detection field of inorganic molecules and biological molecules.

Description

technical field [0001] The invention relates to a method for preparing a surface-enhanced Raman spectrum substrate. Background technique [0002] Surface-enhanced Raman spectroscopy (SERS) is an analysis and characterization technique established on the basis of Raman scattering. Because of its narrow band, high resolution, quenchable fluorescence, low water interference, and high sensitivity, it is widely used in surface catalysis, chemical analysis, food testing, materials science, and biomedicine. However, whether surface-enhanced Raman spectroscopy can be developed into an analytical technique with practical application significance depends largely on the reproducibility and stability of surface-enhanced Raman spectroscopy. The key point is to prepare a sensitive High, reproducible, high stability, and easy to prepare surface-enhanced Raman spectroscopy active substrate. [0003] Due to the higher requirements for on-site research and rapid detection in recent years, S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65
Inventor 哈斯乌力吉林爽林翔吕志伟娄秀涛杨芳贾宝申
Owner HARBIN INST OF TECH
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