Metal nano porous structure and preparation method and application thereof

A porous structure and nanoporous technology, applied in the field of nanopores, can solve the problems of high production cost and cumbersome process, and achieve the effects of simple materials, mutual conversion, and stable device structure.

Active Publication Date: 2018-07-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It overcomes the problems of high manufacturing cost and cumbersome process of solid-state nanopores. At the same time, the nanoporous structure itself has a strong surface-enhanced Raman effect, which opens up important applications of nanopores in life analysis.

Method used

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  • Metal nano porous structure and preparation method and application thereof
  • Metal nano porous structure and preparation method and application thereof
  • Metal nano porous structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The method for preparing nanoporous of the present invention, comprises the steps:

[0045] (1) Preparation of glass capillary tip: The instrument used is P-2000 needle puller from SUTTER, USA, and the glass capillary is BOROSILIGATE GLASS WITH FILAMENT from SUTTER, O.D: 1.0mm, I.D: 0.58mm, and the total length is 10cm. Set parameters as LINE 1: HEAT=300, FIL=4, VEL=28, DEL=230, PUL=Null LINE 2: HEAT=290, FIL=3, VEL=25, DEL=200, PUL=170.

[0046] The diameter of the tip of the capillary prepared under the above conditions with this specification capillary is 100-200 nm, such as figure 2 shown.

[0047] (2) Preparation of 15-nm spherical gold nanoparticles seed crystals: 50mL of 0.01% HAuCl 4 Heat the solution to boiling, quickly add 2mL 1% trisodium citrate aqueous solution, some blue at first, then light blue, then blue, then red after heating, and transparent wine red after boiling for 7-10min, stop heating, cool to room temperature Can. The prepared gold nanopar...

Embodiment 2

[0052] Compared with Example 1, Example 2 only prolongs the reaction time in step (5) of Example 1 to 22 h and 30 d respectively, and the overall size and diameter of the prepared metal nanoporous structure are 10 μm and 90 μm, respectively, as Figure 4 c, 4d shown.

Embodiment 3

[0054] Example 3 Compared with Example 1, only the metal nanoporous structure was prepared by directly reacting the chloroauric acid solution in the step (4) of Example 1 without adding a seed crystal. Compared with the seed crystal, the morphology of the metal nanopore formed without the seed crystal is relatively loose, such as Figure 5 As shown, the overall size diameter of the prepared metal nanoporous structure is 3-10 μm.

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Abstract

The invention relates to a metal nano porous structure. The metal nano porous structure comprises a nanocluster which is coordinated with a capillary tip; the nanocluster comprises spherical, flaky orpunctured nano branches, holes or pore channels are formed among the nano branches, and the metal is preferably gold, silver or copper. The preparation method comprises the following steps that a reducing agent solution is dispersed into a metal compound aqueous solution from the capillary tip so that the nano porous structure can be prepared at the capillary tip in situ. The metal nano porous structure has the advantages that the preparation method is simple, low in cost, the structural morphology is controllable, and movement and locating are convenient; and meanwhile, the metal nano porousstructure has the advantages of high raman optical activity and the like, and has wide application in the fields of life analysis, device sensing, single molecule detection and the like.

Description

technical field [0001] The invention belongs to the technical field of nanopores, and in particular relates to a metal nanoporous structure and its preparation method and application. Background technique [0002] The principle of nanopore sequencing is to drive individual molecules through the nanopore one by one by an external electric field force, and to identify and sequence according to the electrical signals that can generate different blocking degrees and blocking times when different molecules pass through the nanopore. However, in the actual detection process, due to the extremely fast speed of the hole, the electrical blocking signal is extremely small, and it is difficult to distinguish the signals of adjacent molecules, which hinders the development of nanopore sequencing technology. At present, nanopore sequencing technology can not only be characterized by electrical parameters, but also has another development direction using signal conversion technology and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/24G01N21/65
CPCG01N21/658B22F9/24B22F1/0553B22F1/054
Inventor 王康杨金梅钱思奇潘晓彤夏兴华
Owner NANJING UNIV
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