Dual-ligand Janus nano-particle as well as preparation method and application thereof

A nanoparticle and inorganic nanoparticle technology, which is applied in the field of dual-ligand Janus nanoparticles and its preparation, can solve the problem of difficulty in effectively controlling the ligand ratio of Janus-structured nanoparticles, cumbersome preparation process, and low grafting density of Janus-structured nanoparticles. problem, to achieve the effect of solving the problem that the ratio of ligands is difficult to be effectively adjusted, the operation is simple, and it is convenient for large-scale preparation

Active Publication Date: 2019-05-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present inventor describes new methods that use various techniques such as plasmonics or atomic force microscopy (AFM). These modifications allow for precise manipulation over complex structures like quantum dots without requiring expensive equipment. Additionally, these modification processes have improved efficiency when making multiple types of molecules called dipolymer nano particles. Overall, this innovative technologies aim to provide novel ways to create high quality functional films containing both polyeupletone and biomolecule components.

Problems solved by technology

This patented technical problem addressed in this patents relates to making stable binary compound semiconductor nanocomposites for various applications such as sensing devices, biomedical tools, light emitting diodes, batteries, fuel cells, photovoltaics, solar energy converters, water purification systems, drug delivery agents, and many others.

Method used

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preparation example Construction

[0030] The plasma etching re-modification technology method for preparing double-ligand Janus nanoparticles provided by the invention comprises the following steps:

[0031] (1) Preparation of dispersion solution of polymer-grafted inorganic nanoparticles: Use the first polymer terminated by functional groups to graft and modify the surface of inorganic nanoparticles by ligand exchange method, and then disperse them in a good solvent In, obtain the dispersion solution of the first polymer-grafted inorganic nanoparticles; Wherein, the inorganic nanoparticles include gold, silver, iron oxide nanoparticles and a kind of quantum dots such as cadmium selenide, zinc sulfide, and its diameter is 3.5-100nm; the first polymer is selected from polystyrene, polyethylene, polymethylmethacrylate, poly(4-vinylpyridine), polyethylene oxide, polyacrylic acid, poly(N-isopropyl at least one of acrylamide); the polymer-terminated functional group contains mercapto (-SH), disulfide bond (-S-S-), ...

Embodiment 1

[0039] A double-ligand Janus structure nanoparticle prepared according to the following method:

[0040] (1) Preparation of a dispersion solution of polymer-grafted nanoparticles: using polystyrene with a mercapto-terminated molecular weight of 20,000 g / mol, the surface of gold nanoparticles with a diameter of 20 nm is grafted by the ligand exchange method, and then It was dispersed in tetrahydrofuran.

[0041] (2) Preparation of polymer-grafted nanoparticle monolayer film: The polymer-grafted nanoparticle monolayer film was prepared by using the polymer-grafted nanoparticle through the oil-water interface rapid assembly method, and transferred to the surface of the substrate.

[0042] (3) Etching and re-modification of polymer-grafted nanoparticle monolayer film: use a plasma cleaner, use argon as the plasma excitation gas, etch the surface of the polymer-grafted nanoparticle monolayer film to remove the nanoparticles The polymer on the upper surface is removed to expose the...

Embodiment 2

[0044] A double-ligand Janus structure nanoparticle prepared according to the following method:

[0045] (1) Preparation of a dispersion solution of polymer-grafted nanoparticles: using polystyrene with a mercapto-terminated molecular weight of 20,000 g / mol, the surface of gold nanoparticles with a diameter of 20 nm is grafted by the ligand exchange method, and then It was dispersed in tetrahydrofuran.

[0046] (2) Preparation of polymer-grafted nanoparticle monolayer film: The polymer-grafted nanoparticle monolayer film was prepared by using the polymer-grafted nanoparticle through the oil-water interface rapid assembly method, and transferred to the surface of the substrate.

[0047] (3) Etching and re-modification of polymer-grafted nanoparticle monolayer film: use a plasma cleaner, use argon as the plasma excitation gas, etch the surface of the polymer-grafted nanoparticle monolayer film to remove the nanoparticles The polymer on the upper surface is removed to expose the...

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Abstract

The invention discloses a dual-ligand Janus nano-particle as well as a preparation method and application thereof, and belongs to the field of the polymer and inorganic nano-composite material. The preparation method comprises the following steps: preparing a simple-layer film from inorganic nano-particles modified by the first polymer through self-assembling, and then performing etching, removingpartial first polymer, and then grafting the second polymer to the exposed part of the surface of the nano-particle, thereby obtaining Janus structure nano-particle. Two different polymers on the Janus structure nano-particle surface are respectively grafted to a first region and a second region, and the first region and the second region are uncrossed regions; the first region and the second region form the whole surface of the inorganic nano-particle. The preparation method disclosed by the invention is simple in operation and capable of controlling the proportion of two polymer ligands onthe surface of the nano-particle. The obtained Janus structure nano-particle can be used in applications for preparing a solid surfactant, an emulsifier, a hydrophilic and hydrophobic conversion material, an asymmetric catalyst, a medicine targeting vector or an optical biosensor.

Description

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Claims

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Application Information

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Owner HUAZHONG UNIV OF SCI & TECH
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