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Surface-enhanced Raman spectrum substrate 4-MBA-MA-Cit-Ag NPs and application thereof

A 4-mba-ma-cit-agnps, surface-enhanced Raman technology, applied in the field of surface-enhanced Raman spectroscopy substrates, can solve the problems of complex operation, time-consuming and labor-intensive, poor stability of metal nanomaterials, and achieve high sensitivity, Good stability, solve the effect of poor stability

Active Publication Date: 2019-06-21
LIAONING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, various types of manganese ions (Mn 2+ ) methods emerge in endlessly, including quantum dot fluorescence, inductively coupled plasma atomic emission spectrometry (ICP-AES), colorimetry, flame atomic absorption spectrometry (FAAS), anodic stripping voltammetry, fluorescence spectrometry, graphite furnace atomic Absorption spectroscopy, etc., these methods are complicated to operate, time-consuming and labor-intensive
[0004] The key to the specific detection of metal ions by surface-enhanced Raman scattering spectroscopy (SERS) lies in the preparation of the substrate. In the detection of Raman spectroscopy, the problem of poor stability of metal nanomaterials often exists.

Method used

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  • Surface-enhanced Raman spectrum substrate 4-MBA-MA-Cit-Ag NPs and application thereof
  • Surface-enhanced Raman spectrum substrate 4-MBA-MA-Cit-Ag NPs and application thereof
  • Surface-enhanced Raman spectrum substrate 4-MBA-MA-Cit-Ag NPs and application thereof

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Embodiment 2

[0051] Semi-quantitative detection of Mn by surface-enhanced Raman spectroscopy based on 4-MBA-MA-Cit-Ag NPs 2+

[0052] (1) Standard curve drawing

[0053] Preparation method: In a 250mL Erlenmeyer flask, add 100mL (0.001mol / L) of AgNO 3 After heating and boiling, add 5mL of 0.035mol / L trisodium citrate, continue stirring for 1h while boiling, and cool to room temperature. Add 0.2 mL 4-MBA (0.001 mol / L) and 0.4 mL MA (0.001 mol / L), and continue stirring at room temperature for 2 h to obtain 4-MBA-MA-Cit-AgNPs. Centrifuge at 6000r for 10min, wash with water, and redisperse into 100mL water. Store in a 4°C refrigerator for later use.

[0054] In 15mL centrifuge tubes, add 5mL prepared 4-MBA-MA-Cit-Ag NPs, and then add 30μL of different concentrations of Mn 2+ Standard solution, add distilled water to make up to 10mL, mix evenly, and prepare Mn-containing 2+ The standard concentrations are 0, 0.5, 1, 1.5, 2, 3, 4×10 -4 The functionalized 4-MBA-MA-Cit-Ag NPs solution of M ...

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Abstract

The invention discloses a surface-enhanced Raman spectrum substrate 4-MBA-MA-Cit-Ag NPs and an application thereof. The surface-enhanced Raman spectrum 4-MBA-MA-Cit-Ag NPs is prepared by modifying silver nanoparticles with trisodium citrate, melamine and 4-mercaptobenzoic acid. Different degrees of agglomeration of the nano substrate are achieved by combining different concentrations of divalent manganese ions with groups in the 4-MBA-MA-Cit-Ag NPs, and the concentration of the divalent manganese ions is reflected by detecting a Raman signal of the characteristic peak intensity ratio. The method is advantaged in that the process is simple, operability is strong, and the method has reference significance for the preparation of high performance surface-enhanced Raman spectrum substrates.

Description

technical field [0001] The invention relates to the technical field of surface-enhanced Raman spectroscopy, more specifically to a method for specifically identifying Mn 2+ Surface-enhanced Raman spectroscopy (SERS) substrates and their preparation and applications. Background technique [0002] Surface-enhanced Raman scattering spectroscopy (SERS) is a surface analysis technique based on the detection of molecular vibrations. By analyzing the vibrations of substances adsorbed in a metal substrate, information such as the structure of the adsorbed substances is obtained, and then the type of the substance is determined. By adsorbing the detection molecules to suitable metal nanoparticles, the electromagnetic field effect of the metal nanoparticles is used to amplify and analyze the vibration information to obtain more accurate spectral signals. The high sensitivity of surface-enhanced Raman scattering spectroscopy technology enables the technology to detect single-molecule ...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 张谦滕菲宋朋王慧婷夏立新
Owner LIAONING UNIVERSITY
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