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High-efficient preparation method of core-shell structure nanowires

A core-shell structure and nanowire technology, applied in the field of nanomaterials, can solve the problems of cumbersome synthesis, high structural parameter requirements, and low preparation efficiency, and achieve the effects of simple and efficient methods, low structural parameter requirements, and shortened time

Inactive Publication Date: 2018-03-30
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional assembly obtains nanowires by adjusting the structural parameters of the polymer, which requires high structural parameters and low purity of the obtained product; the method of crystallization-induced assembly can obtain regular nanowires, but the applicable polymer types are limited and the synthesis is cumbersome. The core of the nanowire is highly crystalline and cannot be functionalized
We have been developing a method for preparing nanowires through the interaction of DNA and polymers—the DNA template method. However, the previous method for preparing nanowires between DNA and polymer micelles (Angew.Chem. Int. Ed. 2012, 51, 1- 5), the experiment period is long, the preparation efficiency is low, and the application is limited

Method used

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  • High-efficient preparation method of core-shell structure nanowires
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  • High-efficient preparation method of core-shell structure nanowires

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Example 1 PEG 113 - b -P4VP 45 Preparation of / 5522 bp DNA Monodisperse Nanowires

[0028] 2mLPEG 113 - b -P4VP 45 Methanol solution (2 mg / mL), slowly add 3 mL of saturated carbon dioxide water, then slowly add 1 mL of 5522 bpDNA aqueous solution (0.2 mg / mL), stir slowly for 4 hours, then add 14 mL of carbon dioxide water. After 24 h of stabilization, 1 μL of 1,4-dibromobutane was added to crosslink for 48 h.

Embodiment 2

[0029] Example 2 PEG 113 - b -P4VP 76 Preparation of / 5522 bp DNA Monodisperse Nanowires

[0030] 2mLPEG 113 - b -P4VP 76 Methanol solution (2 mg / mL), slowly add 3 mL of saturated carbon dioxide water, then slowly add 1 mL of 5522 bp DNA aqueous solution (0.2 mg / mL), stir slowly for 4 hours, then add 14 mL of carbon dioxide water. After 24 h of stabilization, 1 μL of 1,4-dibromobutane was added to crosslink for 48 h.

Embodiment 3

[0031] Example 3 PEG 113 - b -P4VP 100 Preparation of / 5522 bp DNA Monodisperse Nanowires

[0032] 2mLPEG 113 - b -P4VP 100 Methanol solution (2 mg / mL), slowly add 3 mL of saturated carbon dioxide water, then slowly add 1 mL of 5522 bp DNA aqueous solution (0.2 mg / mL), stir slowly for 4 hours, then add 14 mL of carbon dioxide water. After 24 h of stabilization, 1 μL of 1,4-dibromobutane was added to crosslink for 48 h.

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Abstract

The invention belongs to the technical field of nano materials and particularly relates to a high-efficient preparation method of core-shell structure nanowires. The method combines amphiphilic blockpolymer poly (ethylene glycol)-b-poly(4-vinylpyridine) (or hydrophobic amine polymer) with DNA in protonated water / methanol solution (or amine polymer good solvent), and then the poor solvent water is added to gradually form the nanowires. The method can mass-produce the nanowires at different sizes of which the core-shell structure can be cut, and the preparation process is simple and highly efficient; and the poly(4-vinylpyridine) (or hydrophobic amine polymer) blocks of the nanowires can be functionally modified to realize the hybridization of the nanowires, and the nanowires can also serve as a template to obtain composite materials with excellent performance.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and in particular relates to an efficient preparation method of a core-shell structured nanowire. Background technique [0002] In recent years, a variety of nanomaterials have attracted people's attention, among which one-dimensional nanomaterials have been one of the research hotspots. One-dimensional nanomaterials are materials with large aspect ratios, which can be divided into inorganic and organic materials. Inorganic materials include gold nanorods, silver nanowires, etc., which play an important role in the fields of photothermal and electrical conductivity. Among the one-dimensional organic nanomaterials, nanowires assembled from polymers have attracted much attention. Polymers can be assembled to obtain nanowires of different lengths and widths, enabling various modifications and functionalizations. Polymer nanowires can be used as templates to prepare hybrid materials, as fill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B1/00B82B3/00B82Y40/00
CPCB82B1/00B82B3/0009B82Y40/00
Inventor 陈道勇王伟冲张卡卡
Owner FUDAN UNIV