Surface enhanced raman detection test paper and application thereof

A surface-enhanced Raman, detection test paper technology, applied in Raman scattering, nanotechnology for materials and surface science, liquid chemical plating, etc., can solve the problem of not preparing SERS detection test paper, etc.

Inactive Publication Date: 2012-08-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far in the field of SERS detection technology, there is no SERS detection test paper that can go out of t

Method used

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  • Surface enhanced raman detection test paper and application thereof
  • Surface enhanced raman detection test paper and application thereof
  • Surface enhanced raman detection test paper and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Using SERS test paper to detect the Raman signal spectrum of probe molecules in a focused laser micro-Raman system

[0062] (1) Study the natural fiber structure of paper

[0063] Select common papers, such as filter paper, napkin paper, sulfuric acid paper, kraft paper, printing paper and newspaper, etc. for scanning electron microscope (SEM) tests such as figure 1 As shown, filter paper, napkin and sulfuric acid paper are relatively pure, with few impurities (such as figure 1 As shown in picture a, picture b and picture c), kraft paper, printing paper and newspapers are filled with more impurities (such as figure 1 As shown in Figure d, Figure e, and Figure f). The microfibers have a width dimension of 20-100 microns. The microfiber network of filter paper and napkin is very loose, which makes the wettability of filter paper and napkin and other household papers good. The fiber size of household paper such as napkins is smaller than that of filter paper...

Embodiment 2

[0091] Through the test paper for 30 days before and after packaging for 10 -6 Raman test of mol / L R6G molecules, such as Figure 16 It is shown that the packaged test paper can be preserved for a long time, which is beneficial to the wide application of SERS test paper in many fields. Embodiment 2: Application of SERS test paper to detect Raman signal spectrum of probe molecule in portable Raman system

[0092] (1) Study the natural fiber structure of paper

[0093] Concrete steps are identical with embodiment 1.

[0094] (2) Simulate the local electric field enhancement of metal folds and fibers of the same size

[0095] Concrete steps are identical with embodiment 1.

[0096] (3) Prepare a certain thickness of silver metal coating on the surface of the paper by physical vapor deposition (PVD)

[0097] Concrete steps are identical with embodiment 1.

[0098] (4) Test the performance of SERS test paper in a portable Raman system

[0099] The detection of properties suc...

Embodiment 3

[0105] Embodiment 3: adopt the method for electroless plating to prepare SERS test paper and be used for detecting ethanol molecule

[0106] (1) Study the natural fiber structure of paper

[0107] Concrete steps are identical with embodiment 1.

[0108] (2) Simulate the local electric field enhancement of metal folds and fibers of the same size

[0109] Concrete steps are identical with embodiment 1.

[0110] (3) Prepare a certain thickness of silver metal coating on the surface of the paper by electroless plating

[0111] First configure the following three solutions:

[0112] a) 0.1 g of silver nitrate, 5 ml of deionized water, dripping an appropriate amount of ammonia water until clarified;

[0113] b) 0.5 grams of potassium sodium tartrate, 5 ml of deionized water;

[0114] c) 0.5 gram of tin protochloride, 50 ml of water.

[0115] Under the condition of 25°C, place the sulfuric acid paper in c) stannous chloride solution for sensitization for 10 minutes, take it out...

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Abstract

The invention relates to a piece of surface enhanced raman detection test paper and the application thereof, which belong to the technical field of ultra-sensitive test analysis, in particular to the piece of surface enhanced raman detection test paper and the application of the paper to detection of biological or chemical probe molecules with raman signals. The surface enhanced raman detection test paper is obtained by covering a precious metal layer on the surface of paper with a natural fiber micro nano multi-grade structure through the physical vapor deposition or chemical plating technology, the paper can be filter paper, parchment paper, napkin, newspaper or printing paper and the like, the precious metal film is gold or silver and the like, and the thickness of the precious metal film is 5 nanometers to 90 nanometers. Combined action of size, period and roughness enables incident light to generate a local electric field on the surface of a multi-stage structure and enables the electric field to be enhanced, and the detection limit can reach 10-10mol/L. The test paper has the advantages of being good in flexibility, low in cost, free of environment pollution, capable of being prepared in batch and the like, thereby being capable of being used in detection of probe molecules such as rhodamine 6G, p-aminothiophenol, riboflavin or ethanol and the like.

Description

technical field [0001] The invention belongs to the technical field of ultra-sensitive testing and analysis, and in particular relates to a surface-enhanced Raman detection test paper which can be prepared on a large scale, can be widely used, is highly efficient, and is environmentally friendly, and is used in detecting biological or chemical probes with Raman signals. Needle molecular applications. Background technique [0002] Surface-enhanced Raman scattering (SERS) is an important technique in Raman spectroscopy. As an important trace analysis method, it has been widely studied and applied since its inception. SERS detection enables enhancement factors up to 10 14 ~10 15 , enabling single-molecule detection. The surface selection rule and the selectivity of resonance enhancement enable SERS to enhance only the target molecule or group in an extremely complex system and obtain simple and clear spectral information. In addition, SERS spectroscopy can be conveniently ...

Claims

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Application Information

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IPC IPC(8): G01N21/65C23C14/18C23C18/42B82Y40/00B82Y30/00
Inventor 孙洪波徐彬彬陈岐岱徐颖张然
Owner JILIN UNIV
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