Surface-enhanced Raman substrate with flexibility and light transmission and its preparation method

A surface-enhanced Raman and light-transmitting technology, applied in Raman scattering, material excitation analysis, etc., can solve problems such as limiting the application range of SERS technology, increasing detection steps and time, and heavy hard substrate templates, etc., to achieve excellent flexibility Good quality and light transmittance, low cost, and simple construction method

Active Publication Date: 2015-11-18
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the enhanced Raman substrate of this hard template has a high enhancement effect, the pollutants must be extracted by an appropriate solvent during detection, and then dropped on the substrate for Raman testing
Therefore, the steps and time of detection are increased
In addition, hard base formwork is heavy and expensive
Therefore, the application range of SERS technology is greatly limited

Method used

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  • Surface-enhanced Raman substrate with flexibility and light transmission and its preparation method
  • Surface-enhanced Raman substrate with flexibility and light transmission and its preparation method
  • Surface-enhanced Raman substrate with flexibility and light transmission and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Take 10mg PMMA, dissolve it in 7ml toluene solution, and stir evenly;

[0031] 2) Take 15ml of freshly prepared gold nanoparticle solution in a 25mL beaker;

[0032] 3) Add the toluene solution containing 10mgPMMA to the top of the gold nanoparticle solution to form a water / toluene double-layer structure;

[0033] 4) Then slowly add ethanol solution (1ml / h) to the above-mentioned beaker, and stop adding after all the gold nanoparticles float from the solution to the water / toluene interface;

[0034] 5) After the upper layer of toluene solution is volatilized, transfer out the gold nanoparticle / PMMA film substrate assembled on the water surface with plastic wrap.

Embodiment 2

[0036] 1) get the gold nanoparticle / PMMA film substrate synthesized in embodiment 1, under dark condition, soak in 10 -5 M isothiocyanate malachite green ethanol solution for 20 minutes, then take it out and wash it several times with ethanol, and finally dry it overnight;

[0037] 2) Paste the dried gold nanoparticles / PMMA film substrate on a glass slide, and measure the Raman signal of malachite green isothiocyanate with a confocal Raman spectrometer.

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Abstract

A flexible and light-transmitting surface-enhanced Raman substrate and a preparation method thereof relate to a surface-enhanced Raman substrate with flexible and light-transmitting materials as a carrier and a template, and assembled and ordered gold nanoparticles as Raman enhancement factors. Mandi. The invention uses ethanol as an inducing factor to induce the gold nanoparticles in the aqueous solution to float to the interface of water and toluene, and self-assemble into an ordered nano-layer structure. After the toluene is volatilized, the flexible and light-transmitting materials in the toluene solution fix the assembled nanoparticles to form a flexible and light-transmitting surface-enhanced Raman substrate. Therefore, the surface-enhanced Raman substrate can be directly placed on the surface of objects of various shapes, and the pollutants on the surface of the object can be detected quickly and in situ. It makes up for the shortcomings of the hard substrate and opacity of the traditional surface-enhanced Raman substrate. The novel surface-enhanced Raman substrate has simple manufacturing method, short process and low cost, is suitable for mass production, and has broad application prospects in detection.

Description

technical field [0001] The invention relates to a surface-enhanced Raman substrate, in particular to a surface-enhanced Raman substrate with flexible and light-transmitting materials as carriers and templates, and ordered gold nanoparticles as Raman enhancement factors. It is mainly used for surface-enhanced Raman detection, which not only has high detection sensitivity, but also can realize real-time and in-situ detection of pollutants. In addition, the inventive method can also be used in the preparation of other flexible and light-transmitting optical devices. Background technique [0002] Surface Enhanced Raman spectroscopy (SERS) refers to the phenomenon that when some molecules are adsorbed on the surface of some rough metals (such as gold, silver or copper), the intensity of the Raman spectrum is greatly enhanced. SERS technology has extremely high detection sensitivity and selectivity for surface substances, and can observe the "fingerprint" information (chemical st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
Inventor 郑煜铭钟鹭斌尹君
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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