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System for driving self-assembly of magnetic nanoparticles based on magnetic field and processing method

A magnetic nanoparticle, magnetic field driven technology, applied in the fields of nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of poor self-assembly structure consistency and low yield of particles, so as to save the complex processing process, simplify the difficulty, improve the The effect of precision

Active Publication Date: 2021-07-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, in terms of magnetic field-controlled self-assembly of magnetic nanoparticles, there are still problems of poor particle self-assembly structure consistency and low yield.

Method used

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  • System for driving self-assembly of magnetic nanoparticles based on magnetic field and processing method
  • System for driving self-assembly of magnetic nanoparticles based on magnetic field and processing method
  • System for driving self-assembly of magnetic nanoparticles based on magnetic field and processing method

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Embodiment Construction

[0026] Embodiments of the present invention are described in further detail below:

[0027] see figure 1 with figure 2 , a system for self-assembly of magnetic nanoparticles driven by a magnetic field, comprising a silicon substrate 1, a groove structure, and a microfluidic channel 5, and the bottom of the microfluidic channel 5 is in direct contact with the groove structure, and the groove structure includes a first gold thin film 3 and a second gold thin film 4, the first gold thin film 3 is located on the second gold thin film 4, and the two are integrally formed, and the second gold thin film 4 is nested with a number of nano soft magnets 2 in an array, The first gold thin film 3 is provided with several through grooves, and the through grooves and the nano soft magnets 2 are arranged in one-to-one correspondence, the centerline of the through grooves is aligned with the centerline of the nano soft magnets 2, and the depth of the through grooves is consistent with The d...

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Abstract

The invention discloses a system for driving self-assembly of magnetic nanoparticles based on a magnetic field and a processing method. The system comprises a silicon substrate, wherein the silicon substrate is provided with a groove structure, the groove structure comprises a first gold film and a second gold film, the first gold film is located on the second gold film, the first gold film and the second gold film are integrally formed, a plurality of nano soft magnets are nested in the second gold film in an array manner, a plurality of through grooves are formed in the first gold film, the through grooves and the nano soft magnets are arranged in a one-to-one correspondence manner, a microfluid channel for circulating magnetic nanoparticle suspension liquid is formed in the upper side of the groove structure, and bias magnetic fields are respectively arranged on the upper side of the microfluid channel and the lower side of the silicon substrate. By means of the geometric constraint effect of the specially-designed groove structure and the high-local-area strong-magnetic dipole attraction effect of the nano soft magnet, the magnetic nano particles are promoted to be self-assembled to form a stable assembly structure under the effect of an external bias magnetic field.

Description

technical field [0001] The invention relates to the field of self-assembly of magnetic nanoparticles driven by a magnetic field, in particular to a system and a processing method for self-assembly of magnetic nanoparticles driven by a magnetic field. Background technique [0002] With the development of nanotechnology, the bottom-up approach to prepare functionalized nanomaterials with regular structures has attracted widespread attention since it was proposed due to its high throughput and low cost. Among them, the self-assembly method based on magnetic field-driven magnetic nanoparticles is often used to synthesize or design functional materials and devices due to the characteristics of non-contact, transient and anisotropic magnetic control. [0003] However, in terms of magnetic field-controlled self-assembly of magnetic nanoparticles, there are still problems of poor structure consistency and low yield of self-assembled particles. Contents of the invention [0004] T...

Claims

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Application Information

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IPC IPC(8): B82B3/00
CPCB82B3/0009
Inventor 孙佳佳史宗谦李明佳陈双刘小凤钟明杰
Owner XI AN JIAOTONG UNIV
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