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
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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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