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A kind of surface treatment method of surface-enhanced Raman spectroscopy base material

A surface-enhanced Raman and base material technology, applied in Raman scattering, material excitation analysis, nanotechnology, etc., can solve the problems of complex operation steps, power consumption, strict operation requirements, etc., and achieve stable operation process, low cost, good repeatability

Active Publication Date: 2015-08-12
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Kauffmann, J.M. et al. (Kauffmann, J.M. et al. Electrochim. Acta 1998, 43, 3467–3473) found that the oxidation of hydrogen peroxide is too strong, which will make I - Totally removes and oxidizes the gold nanoparticle surface
Therefore, although this method is simple and practical, it can effectively remove I- on the surface of gold nanoparticles, but the surface of the final gold nanoparticles is covered with a layer of oxide, the substance to be tested cannot be effectively adsorbed on the oxide surface, and the Raman enhanced activity is still low. ; (2) Electrochemical oxidation method
ZQ Tian et al. (ZQ Tian et al. Anal. Chem. 2008, 80, 5118–5125) used electrochemical methods to oxidize I on the surface of gold nanoparticles - , the strongly adsorbed I - Converted to weakly adsorbed species such as IO3-, but the method is complicated in operation steps, needs to consume electric energy, and the operation requirements are strict, and the surface of the treated gold nanoparticles is easy to re-adsorb I - or use I - Fully culled without generating IO 3- and other weakly adsorbed species, resulting in the surface of gold nanoparticles being too clean for stable storage

Method used

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  • A kind of surface treatment method of surface-enhanced Raman spectroscopy base material
  • A kind of surface treatment method of surface-enhanced Raman spectroscopy base material
  • A kind of surface treatment method of surface-enhanced Raman spectroscopy base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take a 50mL round bottom flask, add 19mL ultrapure water, 2mg chloroauric acid, 1mL sodium citrate aqueous solution (5mM), and stir for 5-10min until a clear solution is obtained;

[0028] (2) Add 1mL of sodium borohydride aqueous solution (0.1M);

[0029] (3) After stirring at room temperature for 4 hours, let it stand still. The product obtained is named A and stored at 4°C;

[0030] (4) Take a 500mL round bottom flask, add 300mL of ultrapure water, 600mg of chloroauric acid, and 3g of PVP in sequence and stir for 15-20min until the solution becomes clear;

[0031] (5) Add potassium iodide (0.25M aqueous solution, 25mL), ascorbic acid (0.15M aqueous solution, 20mL), A (0.05mL) in sequence

[0032] (6) After stirring at room temperature for 15 minutes, let it stand, and the obtained product was named B;

[0033] (7) Add 0.001mL concentrated ammonia water (25% aqueous solution) to B, stir at room temperature for 30min, and name the product C.

[0034] see results...

Embodiment 2

[0036] (1) Synthesize product B according to steps (1)-(6) of Example 1;

[0037] (2) Add 10mL concentrated ammonia water (25% aqueous solution) to product B, and stir at room temperature for 30min.

Embodiment 3

[0039] (1) Synthesize product B according to steps (1)-(6) of Example 1;

[0040] (2) Add 0.001mL methylamine aqueous solution (25%) to product B, and stir at room temperature for 10min.

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Abstract

The invention discloses a surface processing method for surface enhanced Raman spectrum substrate material. The surface processing method includes the following steps that (1), metal nano-particles and an appropriate amount of amine substances are mixed; (2), mixing is performed for appropriate time at appropriate temperature. The surface processing method is simple in technology, the cost and usage amount of the amine substances used for the processing method are low, and the surface processing method is stable in operation technology and good in repeatability.

Description

technical field [0001] The invention relates to the field of Raman spectrum detection, in particular to a surface treatment method for a surface-enhanced Raman spectrum base material. Background technique [0002] Surface-enhanced Raman spectroscopy is a spectroscopic technique for quickly detecting the molecular structure of the surface of substances. Its main feature is that it can quickly obtain the fingerprint information of trace substances in complex systems, and has the advantages of high sensitivity and high accuracy. Surface-enhanced Raman spectroscopy not only plays an important role in basic scientific research such as DNA detection, molecular adsorption behavior on electrode surfaces, and biological imaging, but also in practical fields such as quality inspection, food safety, explosives, drugs, gemstones, and artwork identification. been widely used in. [0003] The commonly used surface-enhanced Raman spectroscopy active substrate materials are mainly gold or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00G01N21/65B82Y40/00
Inventor 郑南峰刘圣杰
Owner XIAMEN UNIV
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