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Method for synthesizing silver substrate and application of method

A silver substrate and substrate technology, applied in Raman scattering, material excitation analysis, etc., can solve the problems of process cost, process parameters to be optimized, film uniformity, composition control film defects, etc., and achieves a simple and convenient method and stable product surface. , the effect of easy placement

Inactive Publication Date: 2014-12-10
YANGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the method of evaporating or sputtering metal films on the surface of materials such as quartz or silicon wafers is widely used, there are still some problems in the uniformity, composition control, and film defects of the films prepared at present. Cost and process parameters still need to be optimized

Method used

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  • Method for synthesizing silver substrate and application of method
  • Method for synthesizing silver substrate and application of method
  • Method for synthesizing silver substrate and application of method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] (1) Pretreatment of the base titanium sheet: polished and polished with 600, 800, 1200 mesh metallographic sandpaper in turn, followed by ultrasonic treatment in a mixture of ethanol and acetone with a volume ratio of 1:1, and deionized water for 20 minutes, and then placed It was poured into an aqueous hydrochloric acid solution with a volume ratio of 1:1, heated in a constant temperature water bath at a constant temperature of 85 °C for 20 min, and finally the etched titanium sheets were ultrasonically cleaned in deionized water.

[0027] (2) Prepare the mixed bottom solution of silver nitrate and urea: firstly prepare 10mM AgNO 3 and 10mM urea, then add reaction bottom liquids containing different ratios of silver nitrate and urea in the reaction kettle, and add 0.10 mL of HCHO (formaldehyde) to each. If the total volume of the solution in the reaction kettle is less than 5 mL, use deionized water to make up. For the specific dosage, see Table 1.

[0028] Table 1:...

Embodiment 2

[0037] Other methods are the same as those in Example 1, and the Ag / Ti substrates prepared with a molar ratio of silver nitrate and urea of ​​1:2 are used to study the SERS of different concentrations of R6G: first configure 10 -5 M. 10 -7 M. 10 -9 M. 10 -10 M R6G solution, the Ag / Ti substrate prepared under this condition was soaked in the above solution for 1 h, respectively, to obtain a porous Ag / Ti substrate.

[0038] The prepared Ag / Ti substrates were -5 M. 10 -7 M. 10 -9 M. 10 -10 SERS spectrum in M ​​R6G solution, such as Figure 4 shown.

[0039] Depend on image 3 , Figure 4 It can be seen that the substrate pair 2 × 10 -5 M R6G has obvious Raman enhancement effect. The molar ratios of silver nitrate and urea are 2:3, 1:2, 2:5, 1:3, 2:7, 1:4, 2:9 in turn. The corresponding Raman The intensity first increases and then decreases. It can be seen that the Raman enhancement effect is the best when the ratio of silver nitrate and urea is 1:2.

[0040] Depend on ...

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Abstract

The invention discloses a method for synthesizing a silver substrate and application of the method, and relates to the technical field of research of surface phenomena related to adsorption molecules, particularly a synthesizing technology for a metallic nano material substrate used as a probe molecule in SERS detection. The method comprises the following steps: adopting a hydro-thermal synthesis method, using silver nitrate as a silver source, using urea as an ammonia source, using formaldehyde as a reducer, changing the pH value of a solution through the urea, under the hydro-thermal condition, gradually reducing silver, and then preparing the silver substrate, wherein the silver substrate can be used as the substrate for researching surface enhanced raman scattering (SERS). The method is simple, convenient and fast, the used raw materials are relatively cheap, the synthesized product is stable in surface and convenient to store, and the method can be directly used for product representation and SERS detection.

Description

technical field [0001] The invention relates to the technical field of research on surface phenomena related to adsorption molecules, in particular to the synthesis technology of metal nanomaterial substrates used as probe molecules in SERS detection. Background technique [0002] Surface-enhanced Raman scattering (SERS) technology requires less testing of samples without damage, and has high sensitivity. It mainly studies surface phenomena related to adsorbed molecules, such as determining the surface orientation of adsorbed molecules, determining the type of adsorbed molecules, and studying adsorbed molecules. surface reaction, etc. The rapid development of SERS has made it more and more widely used in medicine, materials, food, sensors and other fields. [0003] Usually, the most important condition for the smooth generation of the SERS effect is that the probe molecules should be as close as possible to the surface of the substrate through adsorption, which requires the...

Claims

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Application Information

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IPC IPC(8): G01N21/65
Inventor 杨晨郑栓胡效亚
Owner YANGZHOU UNIV
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