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

Near-infrared silver-copper-sulfur quantum dot and preparation method and application thereof

A near-infrared, sulfur quantum technology, applied in the field of material science, can solve the problems of limited penetration depth spatial resolution, unable to meet the imaging needs and other problems, and achieve the effects of wide application prospects, excellent photostability, and controllable experimental conditions.

Active Publication Date: 2021-06-01
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is serious biological autofluorescence interference in the wavelength range (400-650nm) of visible light fluorescence imaging, and living tissues (including skin, blood, fat, etc.) have strong absorption and scattering effects on photons in this band, resulting in extremely limited penetration Depth (<3mm) and spatial resolution (about 1000μm), unable to meet the imaging needs of deep tissues

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
  • Near-infrared silver-copper-sulfur quantum dot and preparation method and application thereof
  • Near-infrared silver-copper-sulfur quantum dot and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] As an aspect of the technical solution of the present invention, it relates to a method for preparing near-infrared silver-copper-sulfur quantum dots, which includes:

[0027] reacting the first mixed reaction system comprising silver source, mercaptan and selectively added or not added weak polar solvent in a closed environment to prepare a silver precursor solution;

[0028] The second mixed reaction system including silver precursor solution and copper source is subjected to solvothermal reaction at 180-255° C. to obtain near-infrared silver-copper-sulfur quantum dots.

[0029] In some embodiments, the preparation method mainly includes: uniformly mixing a silver source, a mercaptan, and a weakly polar solvent to prepare a clear precursor solution of silver, and then adding a copper source to the silver precursor solution to obtain a silver The copper-sulfur quantum dot has a fluorescence emission peak wavelength at 800-1160nm.

[0030] In some preferred embodiments...

Embodiment 1

[0060] Mix 0.1mmol of silver acetate, 5mmol of octyl mercaptan, and 10mL of octadecene, ultrasonically disperse evenly, then slowly heat to 80°C for 1 hour to obtain a clear and transparent silver precursor solution, and then add 0.065mmol of diethyl disulfide Substitute copper carbamate, heat up to 230°C and react for 2 hours to obtain silver-copper-sulfur fluorescent quantum dots.

[0061] see figure 1 , is the transmission electron micrograph of near-infrared silver-copper-sulfur fluorescent quantum dots in this example, from figure 1 It can be seen from the figure that the near-infrared silver-copper-sulfur fluorescent quantum dot product obtained in this embodiment has a uniform shape and size, and the size is about 18nm, and the fluorescence wavelength is at 1100nm.

Embodiment 2

[0063] Disperse 0.1mmol of silver nitrate and 20000mmol of dodecanethiol with ultrasonic waves, then heat slowly to 100°C to obtain a clear and transparent silver precursor solution, then add 0.1mmol of copper acetate and react at 180°C for 600min to obtain silver Copper-sulfur fluorescent quantum dots.

[0064] see figure 2 , is the fluorescence emission spectrum of the near-infrared silver-copper-sulfur fluorescent quantum dots in this example.

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
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a near-infrared silver-copper-sulfur quantum dot and a preparation method and an application thereof. The preparation method comprises the following steps: reacting a first mixed reaction system containing a silver source, mercaptan and a selectively added or not added weak polar solvent in a closed environment to prepare a precursor solution of silver; and carrying out solvothermal reaction on a second mixed reaction system containing the precursor solution of silver and a copper source at 180-255 DEG C to obtain the near-infrared silver-copper-sulfur quantum dot with the fluorescence emission peak wavelength of 800-1160 nm. The silver-copper-sulfur quantum dots are prepared through a simple high-temperature solvothermal method, the synthesis process is simple and controllable, the yield is high, large-scale preparation can be achieved, fluorescence emission is near-infrared, and the silver-copper-sulfur quantum dots have high quantum efficiency and excellent light stability and have wide application prospects in the fields of biological imaging, near-infrared devices and the like.

Description

technical field [0001] The invention relates to a near-infrared quantum dot and a preparation method thereof, in particular to a near-infrared silver-copper-sulfur quantum dot and a preparation method and application thereof, belonging to the technical field of material science. Background technique [0002] In vivo non-invasive imaging is playing an increasingly important role in biomedical research and clinical practice. Among them, fluorescence imaging technology has the advantages of non-contact, intuitive image, real-time, high sensitivity, economical and convenient, and no radiation hazard. In the field of biomedicine, In particular, it has broad application prospects in the field of fluorescence imaging surgery navigation. [0003] Visible light fluorescence imaging wavelength range (400-650nm) has serious biological autofluorescence interference, and living tissues (including skin, blood, fat, etc.) have a strong absorption and scattering effect on photons in this ba...

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): C09K11/58B82Y20/00B82Y40/00
CPCC09K11/582B82Y20/00B82Y40/00
Inventor 王强斌张叶俊
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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