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One-dimensional magnetic assembly array with single nanoparticle precision and its preparation method and application

A nanoparticle and magnetic nanoparticle technology, applied in the field of one-dimensional arrays, can solve the problems of complex preparation method and uneven morphology, and achieve the effects of simple preparation method, uniform morphology and avoiding agglomeration

Active Publication Date: 2020-05-12
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a one-dimensional magnetic assembly array with single nanoparticle precision and its preparation method and application in order to overcome the problems of complex preparation methods and uneven morphology in one-dimensional magnetic nano-assemblies in the prior art

Method used

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  • One-dimensional magnetic assembly array with single nanoparticle precision and its preparation method and application

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preparation example Construction

[0021] According to a method for preparing a one-dimensional magnetic assembly array provided by the present invention, the method comprises the following steps:

[0022] (1) jetting aqueous ink containing magnetic nanoparticles onto the surface of the substrate in the form of an array by inkjet printing, the receding angle of the surface of the substrate is 3-30°; and

[0023] (2) Under the magnetic field induction, the ink array printed on the surface of the substrate is dried and assembled.

[0024] The concentration of the ink of the present invention reflects the number of particles in the droplet, and determines the distance and interaction between particles. Due to the fact that the distance between particles of the same concentration is also different in the liquid droplets of phase bodies with different spreading areas. Therefore, in the region of the receding angle (RCA) of 3-30°, the RCA is smaller, and the spreading area of ​​the droplet is small at this time, and...

Embodiment 1

[0069] 1. The preparation of a one-dimensional magnetic assembly array with single nanoparticle precision, including the following steps:

[0070] (1) The RCA of the cut untreated polished silicon wafer (thickness: 380±10 μm, purchased from Tianjin Semiconductor Research Institute) is 15.3°, and set aside;

[0071] (2) iron ferric oxide-benzenesulfonic acid maleic anhydride copolymer magnetic ball, namely poly(styrenesulfonic acid maleanic anhydride) sodium salt-coated iron ferric oxide nanometer microsphere is to utilize hydrothermal method to prepare and obtain, will 0.5 Dissolve gPSSMA in 20ml ethylene glycol, then add 0.54g FeCl 3 ·6H 2 O and 1.5g Na 3 C 6 h 5 o 7 Stir the mixed liquid magnetically at room temperature for 3 hours, then transfer it to a 25ml reaction kettle, and react for 12 hours at 200°C; when it reaches room temperature, wash it with deionized water and ethanol mixture for 3 times to obtain superparamagnetic nano Particles, the saturation magnetic ...

Embodiment 2

[0081] The preparation of a one-dimensional magnetic assembly array with single nanoparticle precision includes the following steps:

[0082] (1) Sputter the cut mica sheet with oxygen plasma, the power of sputtering is 20W, and the time of sputtering is 10s, to obtain a highly adherent substrate with a receding angle of 7.3°, for subsequent use;

[0083] (2) 0.25mmol ZnCl 2 , 0.5mmol FeCl 3 ·6H 2 O, 1.5mmol C 6 h 5 Na 3 o 7 2H 2 O and 3mmol uric acid were dissolved in 20mL distilled water, and then 0.3g polyacrylamide was added to the above solution. The mixed liquid was magnetically stirred at room temperature for 3 hours, then transferred to a 25 ml reaction kettle, and reacted at 200° C. for 12 hours. After reaching normal temperature, wash three times with deionized water and ethanol mixture to obtain monodisperse polyacrylamide-coated zinc iron ferrite Zn 0.41 Fe 0.59 Fe 2 o 4 The magnetic ball, that is, zinc iron ferrite-polyacrylamide nano magnetic ball, is...

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Abstract

The invention relates to the field of one-dimensional arrays, and discloses a single-nanoparticle-precision one-dimensional magnetic assembly array and a preparation method and application thereof. The preparation method of the single-nanoparticle-precision one-dimensional magnetic assembly array comprises the following steps: (1) spraying water-based ink containing magnetic nano-particles onto the surface of a substrate in an array form by an ink-jet printing method, wherein the retreating angle of the surface of the substrate is 3-30 degrees; and (2) drying and assembling the ink printed onthe surface of the substrate under the induction action of a magnetic field. The preparation method disclosed by the invention is simple and rapid, saves the cost, and can be used for preparing the single-nanoparticle-precision one-dimensional magnetic assembly array with controllable size and uniform morphology on a large scale.

Description

technical field [0001] The invention relates to the field of one-dimensional arrays, in particular to a one-dimensional magnetic assembly array with single nanometer particle precision and its preparation method and application. Background technique [0002] The interaction between the axial particles of one-dimensional magnetic nanoassemblies makes it have anisotropic physical properties, so it has a wide range of applications in thermogenesis regulation, cell differentiation, magnetic field sensing and structural color display. Among them, the one-dimensional magnetic nanoassembly with single nanoparticle precision is due to its "head-to-head" structure, a certain number of particles has a larger aspect ratio and more concentrated axial interparticle interactions, which will make the magnetic anisotropy larger , can significantly increase the sensitivity of magnetic field induction, and thus has received more extensive attention. [0003] At present, in order to obtain on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B82B3/00B82Y40/00H01F1/00
Inventor 高萌李立宏宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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