Method for preparing nano-porous structure based on nano-particle self-assembly and application thereof

A nanoporous and nanoparticle technology, applied in the field of nanopores, can solve the problems of difficult preparation of small pore size, expensive instruments, and high technical requirements, and achieve the effects of mature processing technology, simple method and good repeatability.

Active Publication Date: 2014-10-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The first object of the present invention is to provide a "bottom-up" method for preparing nanoporous materials by self-assembly of monodisperse nanoparticles, which overcomes the expensive equipment and technical requirements for the preparation of solid-state nanopores. Problems such as high and small pore size are difficult to prepare

Method used

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  • Method for preparing nano-porous structure based on nano-particle self-assembly and application thereof
  • Method for preparing nano-porous structure based on nano-particle self-assembly and application thereof
  • Method for preparing nano-porous structure based on nano-particle self-assembly and application thereof

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Experimental program
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Embodiment 1

[0041] figure 1 It is a schematic diagram of the formation of the nanoporous structure of the present invention. Such as figure 1As shown, the method (technology) for preparing a nanoporous structure by self-assembly of nanoparticles includes a nano-glass capillary 1 as a support, and gold nanoparticles 3 capable of self-assembly under the action of 1,9 nonaneedithiol 2 . Add 1,9 nonanedithiol 2 to the tip of the nano glass capillary 1, and then immerse the tip into a monodisperse gold nanoparticle solution (prepared by Example 7), due to diffusion, 1,9 nonanedithiol Alcohol is in contact with gold nanoparticles 3, and the thiol groups at both ends of a dithiol molecule are bonded to two gold nanoparticles 3 respectively. After such continuous self-assembly, a regular nanoporous structure 4 (gold balls) is finally formed. ), the pore size is jointly regulated by the nanoparticle size and the crosslinker molecules.

[0042] figure 2 is the electron micrograph of a single ...

Embodiment 2

[0046] The support used in Example 1 is a glass capillary. In Example 2, the support is replaced by a quartz capillary, and other conditions remain unchanged. A nanoporous structure (gold ball) of several microns is formed by the self-assembly of gold colloidal nanoparticles. .

Embodiment 3

[0048] Self-assembly of gold nanoparticles with 1,9 nonaneedithiol in solution. When the gold nanoparticle solution is mixed with the 1,9 nonanedithiol solution, the gold nanoparticles are connected to each other through the dithiol. This assembly process is to simulate the self-assembly process of the gold nanoparticles and the dithiol at the tip of the glass capillary.

[0049] Figure 5 It is the electron micrograph of self-assembly of gold colloid in dithiol solution, from Figure 5 It can be seen that the gold colloid has self-assembled in the dithiol solution, and the gap between the nanoparticles is about 1 nanometer. Compared with the porous structure obtained in Example 1, this technical solution is to simulate the assembly of Example 1 at the tip of the capillary The process further illustrates the cross-linking process of gold nanoparticles and 1,9 nonaneedithiol in Example 1. It is proved from examples that a multi-nanopore structure is formed after self-assembl...

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Abstract

The invention relates to a method for preparing a nano-porous structure based on nano-particle self-assembly. Particularly, a capillary tube serves as a support body, and relying on the support body, nano-particles are self-assembled at the pointed end of the capillary tube through a cross-linking agent to form the nano-porous structure. The method for preparing the nano-porous structure is simple and low in cost, has the advantages that the nano aperture is adjustable in size, is convenient to move and position, and has an extensive application range.

Description

technical field [0001] The invention belongs to the technical field of nanopores, and relates to a method for forming a nanoporous structure through self-assembly using monodisperse nanoparticles and an application thereof. Background technique [0002] There are various nanopores and nanochannels in living organisms, which are the ways to connect the inside and outside and exchange matter and energy. Inspired by ion channels on cell membranes, a variety of artificial nanopore systems have been developed, such as protein nanopores and solid-state nanopores. The preparation of artificial nanopores not only promotes the rapid development of new biosensor nanofluidic devices, molecular filtration devices, and single-molecule detection, but also greatly accelerates the progress of third-generation DNA sequencing research. Nanoscale devices that have been constructed so far include biological nanopores (channels), solid-state nanopores (channels) and two types of hybrid nanopor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26G01N21/65B82Y40/00B82Y15/00
Inventor 王康苑春歌夏兴华
Owner NANJING UNIV
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