A method for preparing nanoporous structures based on nanoparticle self-assembly and its application

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

Active Publication Date: 2017-01-18
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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  • A method for preparing nanoporous structures based on nanoparticle self-assembly and its application
  • A method for preparing nanoporous structures based on nanoparticle self-assembly and its application
  • A method for preparing nanoporous structures based on nanoparticle self-assembly and its application

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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. like figure 1As shown, the method (technique) of nanoparticle self-assembly to prepare nanoporous structure includes nanoglass capillary 1 as a support, and gold nanoparticles 3 capable of self-assembly under the action of 1,9 nonanedithiol 2 . 1,9 nonanedithiol 2 was added to the tip of nanoglass capillary 1, and then the tip was dipped into the monodisperse gold nanoparticle solution (prepared in Example 7), due to diffusion, 1,9 nonanedithiol The alcohol is in contact with the gold nanoparticles 3, and the thiol groups at both ends of a dithiol molecule are respectively bonded to the two gold nanoparticles 3. After such continuous self-assembly, a nanoporous structure with regular shape 4 (gold spheres) is finally formed. ), the pore size is regulated by both the nanoparticle size and the crosslinker molecule.

[0042] figure 2 is an electron microscope ima...

Embodiment 2

[0046] The support used in Example 1 is a glass capillary, and in Example 2, the support is changed to a quartz capillary, and other conditions remain unchanged, and a nanoporous structure (gold sphere) of several microns is formed through the self-assembly of gold glue nanoparticles. .

Embodiment 3

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

[0049] Figure 5 That is, the electron microscope image of the self-assembly of gold glue in dimercapto solution, from Figure 5 It can be seen that the gold glue self-assembles 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 Example 1 to assemble at the tip of the capillary. The process further illustrates the cross-linking process of gold nanoparticles and 1,9 nonanedithiol in Example 1. It is proved from the example that a multi-nanoporous 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 by using monodispersed nanoparticle and its application. Background technique [0002] There are various nanopores and nanochannels in living organisms, which are the way to connect the inside and the outside and exchange material 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 combined hybr...

Claims

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Application Information

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Patent Type & Authority Patents(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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