Multistage chiral luminescence enhanced composite material and preparation method thereof

A composite material, luminescence enhancement technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of low quantum efficiency, difficult to generate chiral structure, etc., and achieve low preparation cost , easy to operate, simple effect

Active Publication Date: 2020-04-28
JILIN UNIV
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, the quantum efficiency of nano-perovskite materials is low, and it is not easy to generate chiral structures with the participation of achiral amines.

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
  • Multistage chiral luminescence enhanced composite material and preparation method thereof
  • Multistage chiral luminescence enhanced composite material and preparation method thereof
  • Multistage chiral luminescence enhanced composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A composite material with multilevel chiral luminescence enhancement (AgNR@SiO 2 @L-cys @CsPbBr 3 ) of the preparation process is as follows, specifically divided into five steps:

[0035] 1. Synthesis of silver nanorods (AgNRs) aqueous solution:

[0036] Add 0.2 g of PVP to 25 mL of ethylene glycol, stir and dissolve, add 0.25 g of silver nitrate, add 3.75 g (concentration: 600 mmol / L) of ethylene glycol solution of ferric chloride after dissolving, stir well and transfer to oil In a bath, stir at 130°C for 5 hours. The crude product was then washed by centrifugation and finally dispersed in 10 mL of deionized water.

[0037] 2. AgNR@SiO with multi-level nanostructure 2 Synthesis of composite materials:

[0038] Add 2 mL of the silver nanorod aqueous solution prepared in step 1 into 20 mL of isopropanol, then add 20 microliters of TEOS and 10 microliters of APTES, stir well and then add 1.9 mL of ammonia solution. The solution was stirred at room temperature for ...

Embodiment 2

[0048] A composite material with multilevel chiral luminescence enhancement (AgNR@SiO 2 @L-cys @CsPbCl 3 ) of the preparation process is as follows, specifically divided into five steps:

[0049] 1. Synthesis of silver nanorods (AgNRs) aqueous solution:

[0050] Add 0.2 g of PVP to 25 mL of ethylene glycol, stir and dissolve, add 0.25 g of silver nitrate, add 3.75 g (concentration: 600 mmol / L) of ethylene glycol solution of ferric chloride after dissolving, stir well and transfer to oil In a bath, stir at 130°C for 5 hours. The crude product was then washed by centrifugation and finally dispersed in 10 mL of deionized water.

[0051] 2. AgNR@SiO with multi-level nanostructure 2 Synthesis of composite materials:

[0052] Add 2 mL of the silver nanorod aqueous solution prepared in Step 1 to 20 mL of isopropanol, then add 20 μl of TEOS and 10 μl of APTES, and then add 1.9 mL of ammonia solution. The solution was stirred at room temperature for 2 h. The crude product was th...

Embodiment 3

[0061] A composite material with multilevel chiral luminescence enhancement (AgNR@SiO 2 @L-cys @CsPbCl x Br 3-x ) of the preparation process is as follows, specifically divided into five steps:

[0062] 1. Synthesis of silver nanorods (AgNRs) aqueous solution:

[0063] Add 0.2 g of PVP to 25 mL of ethylene glycol, stir and dissolve, add 0.25 g of silver nitrate, add 3.75 g (concentration: 600 mmol / L) of ethylene glycol solution of ferric chloride after dissolving, stir well and transfer to oil In a bath, stir at 130°C for 5 hours. The crude product was then washed by centrifugation and finally dispersed in 10 mL of deionized water.

[0064] 2. AgNR@SiO with multi-level nanostructure 2 Synthesis of composite materials:

[0065] Add 2 mL of the silver nanorod aqueous solution prepared in Step 1 to 20 mL of isopropanol, then add 20 μl of TEOS and 10 μl of APTES, and then add 1.9 mL of ammonia solution. The solution was stirred at room temperature for 2 h. The crude produc...

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
lengthaaaaaaaaaa
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an all-inorganic perovskite quantum dot coated silver nanorod composite silicon dioxide and cysteine multistage chiral luminescence enhanced composite material and a preparation method thereof, and belongs to the technical field of chiral luminescence material preparation. The preparation method comprises the following steps: reacting polyhydric alcohols to obtain a one-dimensional silver nanorod; then hydrolyzing TEOS and APTES to obtain AgNR (at) SiO2; then, stirring with a cysteine solution at room temperature to obtain an AgNR (at) SiO2 (at) L-cys compound; and finally, compounding the compound with all-inorganic perovskite quantum dots (QDs) prepared by a thermal injection method to prepare the AgNR (at) SiO2 (at) L-cys (at) QDs chiral luminescence enhanced composite material with a multi-stage nano structure. The material has a rod-like morphology, perovskite quantum dots are uniformly distributed on the surface, and AgNR (at) SiO2 (at) L-cys (at) CsPbBr3has 87 times of luminescence enhancement. The material has the advantages of low preparation cost, large-scale preparation, simple method, easiness in operation, good repeatability and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of chiral luminescent materials, in particular to a multi-level chiral luminescent enhanced composite material (AgNR@SiO 2 @L-cys@QDs) and methods for their preparation. Background technique [0002] Chirality is an essential attribute of structures without symmetry centers, symmetry planes, and anti-axis structures, and it exists widely in nature. This property not only has a wide range of applications in the fields of nonlinear optics and spintronics, but also is closely related to biological and pharmaceutical sciences. In the past few decades, compared with chiral organic molecules, chiral inorganic nanomaterials have attracted considerable attention due to their excellent optical and chemical properties, and have shown great potential in the fields of display, lighting, etc. . Among them, chiral perovskites have attracted extensive research due to their unique physical and chemical pro...

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 Applications(China)
IPC IPC(8): C09K11/06C09K11/02C09K11/59C09K11/66B82Y30/00B82Y40/00
CPCC09K11/06C09K11/02C09K11/592C09K11/665B82Y30/00B82Y40/00
Inventor 王宇李震颜岩赵佳奇
Owner JILIN 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