Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of porous glass microsphere SERS substrate embedded with silver nanoparticles and preparation method thereof

A technology of porous glass microspheres and silver nanoparticles, which can be applied to coatings and other directions, can solve the problems of unstable physical and chemical properties, easy to cause poisoning in the environment, complicated substrate preparation, etc., and achieves enhanced Raman signal, low equipment requirements, and preparation process. simple effect

Inactive Publication Date: 2016-03-09
WUHAN UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the physical and chemical properties of polyethylene balls, copper flakes, and porous aluminum films are unstable, and they are very sensitive to heat, oxygen, and ambient humidity, which is not conducive to sensing
In addition, the above-mentioned substrates are complicated to prepare, cannot be completely degraded, and cannot be recycled, and are easy to cause toxicity to the environment, which greatly limits their practical applications.

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 porous glass microsphere SERS substrate embedded with silver nanoparticles and preparation method thereof
  • A kind of porous glass microsphere SERS substrate embedded with silver nanoparticles and preparation method thereof
  • A kind of porous glass microsphere SERS substrate embedded with silver nanoparticles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a porous glass microsphere SERS substrate embedded with silver nanoparticles, the specific steps are as follows:

[0032] 1) Pipette 20ml of 0.1mol / L AgNO3 solution in a dark environment and place it in a small glass bottle with a sealed cap, put 0.05g of porous glass microspheres in the solution, and tighten the cap to seal;

[0033] Then place the small glass bottle in a large beaker containing 300ml of water and a magnetic rotor, and adjust the rotor speed to 300 rpm to make the microspheres-AgNO 3 The solution suspension is fully stirred (the suspension is placed in a small glass bottle, and the purpose of placing the rotor outside the glass bottle is to prevent the solution from being polluted);

[0034] After stirring for 16 hours, the small glass bottle was taken out, the suspension was transferred to a 40 cm long, clean, sealed stainless steel tube, and 150 psi of compressed CO was introduced into the tube. 2 gas, using high-pressure gas ...

Embodiment 2

[0042] A method for preparing a porous glass microsphere SERS substrate embedded with silver nanoparticles, the specific steps are as follows:

[0043] 1) Pipette 30ml of 0.05mol / L AgNO in a dark environment 3 The solution is placed in a small glass bottle with a sealed cap, 0.05 g of porous glass microspheres are placed in the solution, and the cap is tightly sealed;

[0044] Then place the small glass bottle in a large beaker containing 300ml of water and a magnetic rotor, and adjust the rotor speed to 500 rpm to make the microspheres-AgNO 3 After the solution suspension was fully stirred for 12 hours, the small glass bottle was taken out, the suspension was transferred to a 40 cm long, clean, sealed stainless steel tube, and 100 psi of compressed N 2 Gas, remove the compressed gas after 5 hours, take out the suspension and filter out the porous glass microspheres;

[0045] 2) After the porous glass microspheres treated in step 1) were rinsed with deionized water, put 0.2m...

Embodiment 3

[0048] A method for preparing a porous glass microsphere SERS substrate embedded with silver nanoparticles, the specific steps are as follows:

[0049] 1) Pipette 20ml of 0.05mol / L AgNO in a dark environment 3 The solution is placed in a small glass bottle with a sealed cap, 0.05 g of porous glass microspheres are placed in the solution, and the cap is tightly sealed;

[0050] Then place the small glass bottle in a large beaker containing 300ml of water and a magnetic rotor, and adjust the rotor speed to 800 rpm to make the microspheres-AgNO 3 After the solution suspension was fully stirred for 10 hours, the small glass bottle was taken out, the suspension was transferred to a 40 cm long, clean, sealed stainless steel tube, and 120 psi of compressed Ar gas was introduced into the tube, and the compressed gas was removed after 4 hours. Take out the suspension and filter out the porous glass microspheres;

[0051] 2) Rinse the porous glass microspheres treated in step 1) with ...

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
diameteraaaaaaaaaa
diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides a silver nanoparticle embedded porous glass microsphere SERS (Surface Enhanced Raman Scattering) substrate and a preparation method thereof, and belongs to the field of novel sensing materials. The method comprises the following steps: introducing silver nanoparticle into porous glass microspheres to form an SERS substrate ; processing Ag<+> in an AgNO3 solution by agitating and compressed through high-pressure air and then entering pore paths of the porous glass microspheres to be used as a silver nanoparticle precursor, wherein the Ag<+> entering the pore paths is subjected to in-situ reduction to generate Ag nanoparticles which are aggregated under the effect of the narrow pore paths in the porous microspheres to form an aggregate. With the adoption of the SERS substrate, Raman signals of rhodamine and benzoic acid indicators are obviously improved; such substrate is simple in structure and small in size, and has potential application value in the field of biochemical micro-sensing detection.

Description

technical field [0001] The invention belongs to the technical field of nano-sensitive materials, and in particular relates to a novel porous glass microsphere SERS substrate embedded with silver nanoparticles and a preparation method thereof. Background technique [0002] Chemical / biological microsensors have a wide range of needs in the sensing and detection of nanoscale biological / chemical molecules, as well as in vivo and non-destructive detection, and have always been one of the research hotspots in the field of chemical / biological sensing. The Surface Enhanced Raman Spectroscopy (SERS) signal of gold, silver and other noble metal nanoparticles can respond to a single molecule of the analyte. It is an attractive direction to use this feature for the development of chemical / biological microsensors. Among them, silver nanoparticles have attracted much attention due to their strong SERS activity. A key issue in the development of SERS microsensors is to develop SERS carrie...

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): B22F9/24B22F1/02
Inventor 文晓艳王瀚正黄帅黄清
Owner WUHAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com