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A kind of fluorescent nanoparticle and its preparation method and application

A technology of fluorescent nanoparticles and particles, which is applied in the field of fluorescent nanoparticles with multifunctional asymmetric structure and its preparation, can solve the problems of unreported nanoparticles, weakened physical and chemical properties, and increased research and development costs, and achieve non-destructive separation and capture , good biocompatibility, suitable for large-scale industrial production

Active Publication Date: 2022-03-01
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the nanosphere catalyst described in this patent document is a spherical particle formed by a coating structure, which has isotropic properties in volume and surface, and the physical and chemical properties of each functional layer are easily weakened due to recombination, which not only affects the The effect of use also increases the cost of research and development
[0005] At present, there are no reports of nanoparticles with anisotropic multifunctional asymmetric structure for fluorescence detection.

Method used

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  • A kind of fluorescent nanoparticle and its preparation method and application
  • A kind of fluorescent nanoparticle and its preparation method and application
  • A kind of fluorescent nanoparticle and its preparation method and application

Examples

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Embodiment 1

[0053] This embodiment provides a fluorescent nanoparticle, comprising a silica rod, a magnetic particle embedded at one end of the silica rod, and a fluorescent group modified on the silica rod; the silica The length of the rod is 20-500nm, the diameter of the mesopore is 1-5nm, and the particle diameter of the magnetic particle is 70-200nm. The silica rods selected in this embodiment are mesoporous silica rods.

[0054] The magnetic particles are selected from but not limited to r-Fe 2 o 3 、MeFe 2 o 3 , Fe 3 o 4 , at least one of MnO, NiO, NiCoFe, FeCo, and NiFe; wherein Me is one of Co, Mn, and Ni. MnO is selected in this embodiment.

[0055] The specific surface area of ​​the fluorescent nanoparticles is 1200m 2 / g, cumulative pore volume 0.7cm 3 / g, the magnetic response capability is 70emu / g.

[0056] The preparation method of described fluorescent nanoparticle, comprises the steps:

[0057] (1) Preparation of magnetic particles

[0058] The mixture of the ma...

Embodiment 2

[0070] This embodiment provides a fluorescent nanoparticle, comprising a silica rod, a magnetic particle embedded at one end of the silica rod, and a fluorescent group modified on the silica rod; the silica The length of the rod is 20-500nm, the diameter of the mesopore is 1-5nm, and the particle diameter of the magnetic particle is 70-200nm. The silica rods selected in this embodiment are mesoporous silica rods.

[0071] The magnetic particles are selected from but not limited to r-Fe 2 o 3 、MeFe 2 o 3 , Fe 3 o 4 , at least one of MnO, NiO, NiCoFe, FeCo, and NiFe; wherein Me is one of Co, Mn, and Ni.

[0072] In this example choose Fe 3 o 4 .

[0073] The specific surface area of ​​the fluorescent nanoparticles is 800m 2 / g, cumulative pore volume 0.55cm 3 / g, the magnetic response capability is 59emu / g.

[0074] The preparation method of described fluorescent nanoparticle, comprises the steps:

[0075] (1) Preparation of magnetic particles

[0076] The mixture ...

Embodiment 3

[0088] This embodiment provides a fluorescent nanoparticle, comprising a silica rod, a magnetic particle embedded at one end of the silica rod, and a fluorescent group modified on the silica rod; the silica The length of the rod is 20-500nm, the diameter of the mesopore is 1-5nm, and the particle diameter of the magnetic particles is 70-200nm. The silica rods selected in this embodiment are mesoporous silica rods.

[0089] The magnetic particles are selected from but not limited to r-Fe 2 o 3 , MeFe 2 o 3 , Fe 3 o 4 , at least one of MnO, NiO, NiCoFe, FeCo, and NiFe; wherein Me is one of Co, Mn, and Ni. In this example choose Fe 3 o 4 .

[0090] The specific surface area of ​​the fluorescent nanoparticles is 1080.8m 2 / g, cumulative pore volume 0.6cm 3 / g, the magnetic response capability is 65emu / g.

[0091] The preparation method of described fluorescent nanoparticle, comprises the steps:

[0092] (1) Preparation of magnetic particles

[0093] The mixture of th...

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Abstract

The invention belongs to the field of nanomaterials, and specifically relates to a fluorescent nanoparticle and its preparation method and application, including a silica rod, a magnetic particle embedded at one end of the silica rod, and a modified silica rod. There are fluorescent groups, the distribution of magnetic particles and fluorescent groups is anisotropic, so that the fluorescent nanoparticles have an asymmetric structure and anisotropy, so that the surface physical and chemical properties of the nanoparticles present a non-uniform distribution of the respective physical and chemical properties of the nanoparticles The property does not disappear or weaken due to compounding, so that it has both magnetic properties, fluorescent properties and biocompatibility, and can be applied in bacterial detection, antibacterial, sewage purification and biomedical imaging.

Description

[0001] The present invention claims the priority of the prior application of the Chinese invention patent application 201711139831.7 submitted on November 16, 2017, with the title of the invention "a fluorescent nanoparticle and its preparation method and application". technical field [0002] The invention relates to the field of nanomaterials, in particular to an anisotropic fluorescent nanoparticle with a multifunctional asymmetric structure and a preparation method and application thereof. Background technique [0003] Scientists have been focusing on seeking new smart materials with engineering properties and desired functions in the field of nanotechnology. The research topic with the most potential applications in nanotechnology is the bottom-up design of materials, where engineering desired building blocks is often used to create new materials that can be assembled spontaneously. Therefore, the greatest concern at present is to continue to work on the preparation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02G01N21/64
CPCG01N21/6486C09K11/02
Inventor 常智敏董文飞王政邵丹李力葛明锋
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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