Method for preparing nano silver film with enhanced Raman scattering substrate based on microwave technique

A technology that enhances Raman scattering and nano silver, which is applied in the field of nanotechnology applications, can solve the problems of insufficient biocompatibility and versatility, and achieve the effects of widely popularizing the use value, low cost, good Raman effect and repeatability

Inactive Publication Date: 2011-09-14
CHUXIONG NORMAL UNIV
View PDF2 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of insufficient biocompatibility and versatility of most existing SERS substrates, and then provide a nano-silver thin film for efficiently detecting biological m

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 50.0mg of silver nitrate AgNO3 solid particles, 100mg of polyvinyl alcohol [C2H4O]n powder and 10.0mg of sodium citrate C6H5O7Na3 solid particles into 200mL of ultrapure water with resistivity > 18MΩ. In a high-temperature plastic container; take 6 commonly used glass slides and soak them in 98% concentrated sulfuric acid solution and clean them; (volume ratio of 1:1) for 5 hours, then washed three times with tap water, and then rinsed three times with ultrapure water; the commonly used glass slides that have undergone the above treatment are tightly fixed in a square high-temperature-resistant plastic container so that only One side is in contact with the mixed solution of silver nitrate, polyvinyl alcohol and sodium citrate; put the high-temperature-resistant plastic container containing the above slide glass and the mixed solution into the microwave cavity of the microwave oven, and then use microwaves to heat for 30 minutes. In this way, under the action of elec...

Embodiment 2

[0012] Add 70.0mg of silver nitrate (AgNO3) solid particles, 20.0mg of sodium citrate (C6H5O7Na3) solid particles, and 120mg of polyvinyl alcohol ([C2H4O]n) powder into 200mL of ultrapure water with a resistivity > 18MΩ.cm, and heat fully After dissolving, pour it into a square high-temperature-resistant plastic container; take 6 commonly used glass slides and soak and clean them with 98% concentrated sulfuric acid solution; then put the cleaned glass slides into 200mL ammonia water (28%) and hydrogen peroxide (30% ) in a mixed solution (the volume ratio of the two is 1:1) for 10 hours, then washed twice with tap water, and then washed twice with ultrapure water; the commonly used glass slides that have been treated above are tightly fixed on a square high-temperature-resistant Place the plastic container so that only one side is in contact with the mixed solution of silver nitrate, polyvinyl alcohol and sodium citrate; put the high-temperature-resistant plastic container conta...

Embodiment 3

[0014] Add 90.0mg of silver nitrate AgNO3 solid particles, 140mg of polyvinyl alcohol [C2H4O]n powder and 30.0mg of sodium citrate C6H5O7Na3 solid particles into 200mL of ultrapure water with a resistivity > 18MΩ.cm, fully dissolve and pour into a square high temperature resistant In a plastic container; take 6 commonly used glass slides and soak them in 98% concentrated sulfuric acid solution and clean them; The volume ratio is 1:1), soaked for 15h, then washed three times with tap water, and then washed four times with ultrapure water. Tightly fix the commonly used glass slides that have been treated above in a square high-temperature-resistant plastic container so that only one side is in contact with the mixed solution of silver nitrate, polyvinyl alcohol and sodium citrate; Put the plastic container into the microwave action cavity of the microwave oven, and then use the microwave to heat for 10 minutes. In this way, under the action of electrostatic force, the positivel...

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

No PUM Login to view more

Abstract

The invention relates to a method for preparing a nano silver film with an enhanced Raman scattering substrate based on a microwave technique, which comprises the following steps: adding 50.0-90.0mg of silver nitrate, 100.0-140.0mg of polyvinyl alcohol and 10.0-30.0mg of sodium citrate to 200mL of ultrapure water to be dissolved and poured into a container; placing a glass slice which is cleaned by concentrated sulfuric acid into the 200mL of mixed liquid containing ammonia water and hydrogen peroxide to be soaked for 5-15 hours; cleaning the glass slice for 2-4 times respectively by tap water and the ultrapure water; tightly fixing the processed glass slice in the container and enabling one surface of the processed glass slice to be in contact with the mixed liquid containing the silver nitrate, the polyvinyl alcohol and the sodium citrate; placing the container which is filled with the glass slice and the mixed liquid into a microwave oven to be heated for 10-30 minutes; enabling the electropositive nano silver particles which are prepared by microwave heating to be absorbed on the glass slice, wherein the surface of the glass slice is electropositive; and taking out the glass slice out of the reaction solution to be dried, thereby obtaining the nano silver film with the infrared surface enhanced Raman scattering substrate. The method provided by the invention is simple and has the advantage of low cost, and the obtained nano silver film is stable and efficient and has the biological compatibility.

Description

technical field [0001] The invention belongs to the application of nanotechnology, and in particular relates to the technical field of a novel, high-efficiency, biocompatible NIR-SERS substrate nano-silver film preparation method. Background technique [0002] Surface-enhanced Raman scattering (SERS) spectroscopy has been widely used in physics, chemistry, biology and other aspects in recent years because it can detect single molecules. There are many preparation methods for the SERS substrate that must be used in this technology, mainly including chemical reduction method, electrolysis method, laser ablation method, vacuum evaporation method, magnetron sputtering and other methods. [0003] The SERS substrates prepared by different methods have their own advantages and disadvantages. For example, for the preparation of nano-silver sol, two methods, sodium borohydride reduction of silver nitrate and sodium citrate reduction of silver nitrate, are traditionally used, but it ...

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
IPC IPC(8): G01N21/65
Inventor 刘仁明张德清司民真柳振全
Owner CHUXIONG NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap