A system and processing method based on magnetic field-driven self-assembly of magnetic nanoparticles

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: 2022-07-12
XI AN JIAOTONG UNIV
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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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  • A system and processing method based on magnetic field-driven self-assembly of magnetic nanoparticles
  • A system and processing method based on magnetic field-driven self-assembly of magnetic nanoparticles
  • A system and processing method based on magnetic field-driven self-assembly of magnetic nanoparticles

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Embodiment Construction

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

[0027] see figure 1 and 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 film 3 and the second gold film 4, the first gold film 3 is located on the second gold film 4, and the two are integrally formed, and the second gold film 4 is nested in an array with a number of nano-soft magnetic bodies 2, The first gold film 3 is provided with a number of through grooves, and the through grooves and the soft nano-magnets 2 are arranged in a one-to-one correspondence. The diameter of the magnetic nanoparticles is the same, which greatly limits the movement space of the particles confined in the groove. The upper side of the microfluidic ch...

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Abstract

The invention discloses a system and a processing method for driving magnetic nanoparticle self-assembly based on a magnetic field, comprising a silicon substrate, and a groove structure is arranged on the silicon substrate, and the groove structure includes a first gold film and a second gold film , the first gold film is located on the second gold film, and the two are integrally formed, the second gold film is embedded with a number of nano-soft magnets in an array, and the first gold film is provided with a number of through-holes The grooves are arranged one by one through the grooves and the soft nano-magnets, the upper side of the groove structure is provided with a microfluidic channel for circulating the magnetic nanoparticle suspension, the upper side of the microfluidic channel and the lower side of the silicon substrate Bias magnetic fields are respectively provided. The present invention promotes the self-assembly of magnetic nanoparticles to form stable magnetic nanoparticles under the action of an external bias magnetic field by means of the geometric confinement effect of the specially designed groove structure and the high local strong magnetic dipole attraction effect of the nano soft magnets. Assemble the structure.

Description

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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