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Rapid deposition method for periodic ordered magnetic nanowire array

A magnetic nanometer and deposition method technology, which is applied in the field of optoelectronic devices or information engineering, can solve the problems of long array cycle and unrecyclable solvent, and achieve fast deposition speed, controllable line density and environmental friendliness

Active Publication Date: 2019-01-04
LIAOCHENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of traditional assembly of magnetic nanowire arrays such as long period and unrecyclable solvents, and provide an environmentally friendly, orientation-controllable, rapid deposition method for ordered arrays of magnetic nanowires

Method used

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  • Rapid deposition method for periodic ordered magnetic nanowire array
  • Rapid deposition method for periodic ordered magnetic nanowire array
  • Rapid deposition method for periodic ordered magnetic nanowire array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Dissolve 1.2g of sodium hydroxide in 35ml of ethylene glycol, and stir for 2 hours to obtain a uniform solution; add 10ml of hydrazine hydrate solution (80% in mass content) to the above solution, stir and mix evenly, and place in a 0.2T NdFeB permanent magnet above, heated in a 60°C water bath. 5ml of 0.1M nickel chloride ethylene glycol solution was added dropwise with a syringe, and taken out after 10 minutes of reaction, and gray nickel nanowires floating above the solution were obtained. The nanowires were separated from the solution and washed three times with isopropanol to obtain a dispersion of nickel nanowires dispersed in isopropanol, which was used to prepare nickel nanowire arrays deposited on the surface.

Embodiment 2

[0023] The nickel nanowires in Example 1 were dispersed in a certain amount of isopropanol to prepare dispersions of nickel nanowires with different contents, and mixed with an oscillator for 2 minutes to obtain uniformly dispersed nickel nanowire dispersions. Put the PET substrate close to the Halbach magnet (magnetic pole spacing 0.5mm, suction force 65g / cm 2 ), a liquid tank with a certain area is fixed on the surface of the PET substrate. Pour the nickel nanowire dispersion into the liquid tank, let it stand still for 1 min, use a needle to extract the solvent and recover it, and use the natural air-dry method to volatilize a small amount of solvent on the surface of the substrate. After drying, the substrate is separated from the Halbach magnet and the liquid tank to obtain a substrate with a single-oriented periodic magnetic nanowire array on the surface.

[0024] Magnetic nanoarray substrates with different surface coverages are prepared by adjusting the nickel content...

Embodiment 3

[0029] The substrate with a nickel nanowire coverage of 10% on the surface in Example 2 was dried at 80° C. for 24 hours. Rotate the PET substrate with a single orientation on the surface by 90 degrees, and re-attach it to the surface of the Haier shell magnet. Repeat the steps of deposition, solvent recovery and drying in Example 2 to obtain an ordered network of nickel nanowires with a vertical orientation on the surface. Lattice sheet.

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Abstract

The invention relates to a rapid deposition method for a periodic ordered magnetic nanowire array. The rapid deposition method uses a Halbach array magnet to induce the rapid deposition of an orderedmagnetic nanowire array on the surface of a substrate. The preparation method comprises the steps of dispersing magnetic nanowires in a solvent, closely attaching the surface of the substrate to a magnetic surface of the Halbach array magnet, adding a certain amount of magnetic nanowire solution to be in contact with the other side of the substrate to rapidly deposit and directionally arranging the magnetic nanowire array on the surface of the substrate, recovering the solvent, preparing a substrate having a periodic magnetic nanowire array on the surface, and the like. Magnetic nanowires areseparated from the solvent and directionally arranged by means of strong magnetic field attraction of the Halbach array, so that the rapid assembly of the magnetic nano-array and recycling of the solvent are realized, the environmental pollution is reduced, and the development of optoelectronic devices and the information engineering is promoted.

Description

technical field [0001] The invention relates to a rapid deposition method of a periodic and ordered magnetic nanowire array, which belongs to the field of optoelectronic devices or information engineering. Background technique [0002] Ordered arrays of nanowires have potential applications in the fields of magnetism, sensing, and transparent electrodes due to their optimized structures. The traditional ordered nanowire arrays are mainly obtained by nanoimprinting, self-assembly and other technologies, and the traditional magnetic field induction between two magnetic poles. [0003] Nanoimprint mainly uses photolithography mask to prepare nano-array template, which requires complex photolithography technology and limited size. The self-assembly method mainly produces ordered arrangement through the action of solvent, and the multi-directional array arrangement is difficult to control. The traditional magnetic field induction method is to generate a uniform magnetic field b...

Claims

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Application Information

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IPC IPC(8): B81C1/00B81B7/04
CPCB81B7/04B81C1/00031
Inventor 王杰俞正民
Owner LIAOCHENG UNIV
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