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Double-layer structure nanofluidic diode with ion rectification characteristics and preparation method thereof

A technology with rectification characteristics and double-layer structure, which is applied in radiation/particle processing, electrical components, nuclear engineering, etc., and can solve problems such as complex operation and high cost

Active Publication Date: 2020-12-11
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of these methods have disadvantages such as complicated operation and high cost.

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  • Double-layer structure nanofluidic diode with ion rectification characteristics and preparation method thereof
  • Double-layer structure nanofluidic diode with ion rectification characteristics and preparation method thereof
  • Double-layer structure nanofluidic diode with ion rectification characteristics and preparation method thereof

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preparation example Construction

[0023] The preparation method of the double-layer structure nanofluidic diode of the present invention is: take the commercially available aluminum oxide porous membrane as the substrate, and the polystyrene or SiO with the amino group or carboxyl group on the surface with a concentration of 1 to 50 mg / mL 2 The water (or alcohol)-based colloidal suspension formed by the microspheres is loaded on one side of the anodized aluminum porous membrane substrate by soaking method, film throwing method or drop coating method, and after drying at room temperature for 1 to 12 hours, an asymmetric Structured Nanofluidic Diodes.

[0024] Characterization and performance testing are carried out to the double-layer structure nanofluid diode prepared by the method of the present invention, which mainly includes the following parts:

[0025] (1) Morphological characterization:

[0026] The microscopic morphology of the samples was observed with a Quanta FEG 250 environmental scanning electron...

Embodiment 1

[0031] 50 μL of the aminopolystyrene microsphere solution (5 mg / mL) was drop-coated on the surface of the alumina porous membrane, and dried at room temperature for 12 hours to obtain a nanofluidic diode 1 with a double-layer structure. figure 2 Shown is the cross-sectional view of the double-layer structure nanofluidic diode that obtains in embodiment 1, from figure 1 It can be seen that the upper layer is a regularly arranged amino polystyrene microsphere structure, and the lower surface is a regular pore-like structure of an alumina porous membrane.

[0032] The current-voltage curve obtained in the rectification characteristic test of the double-layer structure nanofluid diode obtained in embodiment 1 is as follows Figure 4 , the ion rectification ratio I +2V / I -2V It is 3.5, showing a rectification property similar to that of a diode. The reason may be that: under the corresponding pH conditions, the side of the amino polystyrene microspheres is positively charged, ...

Embodiment 2

[0034] 50 μL of carboxypolystyrene microsphere solution (5 mg / mL) was drop-coated on the surface of the alumina porous membrane, and dried at room temperature for 12 hours to obtain a nanofluidic diode 2 with a double-layer structure. Similarly, it can be seen from the scanning electron microscope that the upper surface of the carboxypolystyrene microsphere-alumina nanofluid diode in Example 2 is a regular arrangement of carboxypolystyrene microspheres with a size of about 50nm, and the lower surface is an oxide The regular pore structure of the aluminum porous membrane, and the obvious double-layer structure can be observed in the cross section (not shown).

[0035] The current-voltage curve that the double-layer structure nanofluidic diode that obtains in embodiment 2 is carried out rectification characteristic test obtains is as follows Figure 5 , the ion rectification ratio I +2V / I -2V is 6.2, showing rectification properties similar to diodes. The reasons may be anal...

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Abstract

The invention provides a double-layer structured nano fluid diode with an ion rectification characteristic and a preparation method of the double-layer structured nano fluid diode. The double-layer structured nano fluid diode comprises an aluminum oxide porous membrane and polystyrene microspheres or silica microspheres, wherein the polystyrene microspheres or silica microspheres are distributed on the surface of the aluminum oxide porous membrane. The preparation method of the double-layer structured nano fluid diode provided by the invention has the advantages of being simple and convenientin operation, low in cost, and the like, needs no complex preparation process, is high in ion rectification ratio, and can be further applied to fields such as ion gating and concentration differencepower generation.

Description

technical field [0001] The invention relates to the bionic field of biological nanochannels, in particular to the field of nanofluid diodes. Background technique [0002] There are a wide variety of nanochannels with different functions in organisms, which intelligently regulate various life activities of organisms, such as material transmission, energy conversion, and information transmission. The directional transport performance of ions means that ions preferentially pass through one side of the channel during transmission, so that the nanochannel presents a diode-like rectification characteristic, which is an important property of biological nanochannels. [0003] Due to the limitation of biomaterials in direct application, inspired by biological nanochannels, biomimetic artificial nanochannels came into being. By imitating the structure of biological nanochannels, researchers obtained artificial nanochannels with directional ion transport properties, called nanofluidic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L45/00
CPCG21K1/00
Inventor 刘兆阅肖天亮
Owner BEIHANG UNIV
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