Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method of copper mesh-based blade-shaped gold SERS active substrate

An active substrate and leaf-shaped technology, applied in the field of materials, can solve the problems of complex preparation process, small substrate area, and inconvenient use

Inactive Publication Date: 2016-08-03
JIANGNAN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Common array structure substrate construction methods are ordered self-assembly of metal nanoparticles, template method and lithography combined with metal plating technology. These methods are often complicated in preparation process and require the use of spin coater and electron beam evaporation plating, which are relatively expensive. equipment, and the resulting base area is small, inconvenient to use

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method of copper mesh-based blade-shaped gold SERS active substrate
  • A kind of preparation method of copper mesh-based blade-shaped gold SERS active substrate
  • A kind of preparation method of copper mesh-based blade-shaped gold SERS active substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1 Preparation and structural characterization of copper grid-based blade-shaped gold SERS active substrate (H 2 After reduction with 4.856mmol / LHAuCl 4 Perform galvanic displacement reaction (long Au)

[0028] Take the copper grid and wash it successively with acetone, deionized water, dilute HCl, and deionized water, and then put it into NaOH with 4mL10mol / L, 2mL1mol / L (NH 4 ) 2 S 2 o 8 Mix solution with 9mL deionized water in a glass bottle, let it stand for 20 minutes, take it out and wash it several times, and then put it in a 120°C oven for dehydration for 2 hours. Controlling H with a gas flow meter 2 The flow rate is 18-20mL / min, and after the outer flame of the alcohol lamp heats and reduces the above-mentioned copper grid for 30 seconds, the surface of the copper grid quickly changes from black to bright copper. In a water bath at 20-30°C, heat the outer flame of an alcohol lamp under H 2 Put the reduced copper grid into 2mL4.856mmol / L HAuCl ...

Embodiment 2

[0029] The preparation of embodiment 2 copper mesh-based leaf-shaped gold SERS active substrates (H under the outer flame heating of alcohol lamp 2 After reduction with 2.428mmol / LHAuCl 4 Perform galvanic displacement reaction (long Au)

[0030] Take the copper grid and wash it successively with acetone, deionized water, dilute HCl, and deionized water, then put it into 4mL10mol / L KOH, 2mL1mol / L (NH 4 ) 2 S 2 o 8 Mix solution with 9mL deionized water in a glass bottle, let it stand for 20 minutes, take it out and wash it several times, and then put it in a 120°C oven for dehydration for 2 hours. Controlling H with a gas flow meter 2 The flow rate is 18-20mL / min, and after the outer flame of the alcohol lamp heats and reduces the above-mentioned copper grid for 30 seconds, the surface of the copper grid quickly changes from black to bright copper. In a water bath at 20-30°C, heat the outer flame of an alcohol lamp under H 2 Put the reduced copper grid into 2mL2.428mmol / L...

Embodiment 3

[0031] Example 3 Preparation and Structural Characterization of Copper Mesh-Based Leaf-shaped Gold SERS Active Substrate (NaBH 4 After solution reduction with 4.856mmol / LHAuCl 4 Perform galvanic displacement reaction (long Au)

[0032] Take the copper grid and wash it successively with acetone, deionized water, dilute HCl, and deionized water, and then put it into 4mL10mol / L NaOH, 2mL1mol / L (NH 4 ) 2 S 2 o 8 Mix solution with 9mL deionized water in a glass bottle, let it stand for 20 minutes, take it out and wash it several times, and then put it in a 120°C oven for dehydration for 2 hours. In a water bath at 20-30°C, put the above-mentioned copper grid into 10mL of 0.02mol / L NaBH 4 In the solution, after standing for 6 hours, the surface of the copper grid gradually changed from black to dark red, and it was taken out and washed several times. In a water bath at 20-30°C, NaBH 4 The copper grid after solution reduction was put into 2mL4.856mmol / L HAuCl 4 In the solutio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a copper net base foliated gold SERS active substrate and a preparation method thereof, and belongs to the technical field of material. According to the invention, metal Cu and a HAuCl4 solution are subjected to a replacement reaction on the copper grid surface, so as to prepare uniform foliated nano-gold in dense arrangement on the copper grid surface. The foliated gold has strong surface enhancement effect on the Raman signal of thiophenol, and can be used as SERS active substrate. The preparation method of copper net base foliated gold SERS active substrate provided by the invention is simple and low in cost; and the obtained copper net base foliated gold SERS active substrate has significant surface enhancement performance, good reproducibility performance, and is convenient for use.

Description

technical field [0001] The invention relates to a SERS active substrate, in particular to a copper mesh-based blade-shaped gold SERS active substrate and a preparation method thereof, belonging to the field of material technology. Background technique [0002] Surface-enhanced Raman scattering (Surface-enhanced Ramanscattering, SERS) technology is an ultra-sensitive detection technology that can reach the level of single-molecule detection. Extensive applications show bright prospects for development. Since the first discovery of the SERS phenomenon in the 1970s, research on the preparation and application of SERS substrates has been a research hotspot in related scientific research fields. With the rapid development of nanotechnology, the preparation technology of SERS substrate is becoming more and more mature. The regular and ordered nanoarray structure system combines the high activity of nanostructure and the high stability of microarray structure, which is an ideal S...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
Inventor 刘雪锋孙春生王晶
Owner JIANGNAN UNIV