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Magnetotactic nano motor and preparation method thereof

A magnetic nanometer and magnetic nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology for sensing, etc., can solve the problems of small-sized nanomotor control, limited nanomotor application, and few nanomotor preparation methods. , to achieve the effect of good motion performance, small size and high sensitivity

Pending Publication Date: 2021-12-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few preparation methods of nanomotors reported so far, and the preparation of small-sized nanomotors (<200nm) faces greater challenges
In addition, due to the influence of Brownian motion and fluid disturbance, the control of the direction of movement of small-sized nanomotors is also a big problem.
The above problems greatly limit the application of nanomotors in the fields of biomedicine and micro-nano manipulation

Method used

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  • Magnetotactic nano motor and preparation method thereof
  • Magnetotactic nano motor and preparation method thereof
  • Magnetotactic nano motor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of the magnetotactic nanomotor of this embodiment mainly includes four parts: (1) preparation of nano-gold with different sizes, (2) preparation of gold-polystyrene eccentric nanoparticles, (3) biotinylated ferric oxide nano Preparation of particles, (4) Preparation of magnetotactic nanomotors.

[0039] (1) Preparation of nano-gold in different sizes: synthesize 10nm nano-gold (in other embodiments, nano-gold seeds of other particle sizes can also be synthesized as required): get 1mM chloroauric acid solution, stir and heat in an oil bath until Boiling, then heating for 10 minutes after boiling, quickly add 38.8mM sodium citrate aqueous solution, continue heating and reacting for 10 minutes, then stop heating;

[0040] The initial growth of nano-gold: Take a certain amount of 10nm nano-gold seed solution, a certain amount of 60mM sodium citrate solution and 142.5mL deionized water into a three-necked flask, heat and stir at 90°C, and divide it into two p...

Embodiment 2

[0048] The magnetotactic nanomotors prepared in Example 1 were respectively placed in 0, 0.05, 0.1, 0.15, 0.2, 0.5, 0.75, and 1M hydrogen peroxide solutions. Its trajectory is as Figure 4 As shown in A, its mean square displacement changes as Figure 4 As shown in B, the diffusion coefficient changes as Figure 4 As shown in C, it can be seen from the figure that as the concentration of hydrogen peroxide increases, the moving distance of the motor increases gradually, and the mean square displacement slope and diffusion coefficient also increase gradually, and reach stability at a concentration of hydrogen peroxide of 0.5M.

Embodiment 3

[0050] The magnetotactic nanomotor prepared in Example 1 was placed in a 0.5M hydrogen peroxide solution, and the direction of motion was observed in a gradient magnetic field of 1000, 600, 400, and 50 Gs, respectively. Its trajectory is as Figure 5 As shown in A, its mean square displacement changes as Figure 5 As shown in B, the diffusion coefficient changes as Figure 5 As shown in C, it can be seen from the figure that with the increase of the gradient magnetic field strength, the moving distance of the motor is gradually increasing, and the mean square displacement slope and diffusion coefficient are also gradually increasing. at the same time with Figure 4 It can be seen from the comparison that the power provided by the external gradient magnetic field to the motor is much higher than the power generated by the chemical reaction of the motor.

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Abstract

The invention relates to the technical field of nano device preparation, in particular to a magnetotactic nano motor and a preparation method thereof. Precious metal nano particles are used as a basic framework of the motor, one side is connected with functional molecules, and the other side is connected with magnetic nano particles. The magnetotactic nano motor is small in size, good in biocompatibility, high in catalytic activity, high in sensitivity, good in motion performance and controllable in motion direction, has wide application prospects in the fields of sensing and environmental protection, has excellent performance in the fields of biosensing and disease treatment due to the special optical and electrical properties of the precious metal nanoparticles, and can be applied to the fields of biosensing and disease treatment. Due to the mechanical property of the magnetic nanoparticles, the magnetic nanoparticles have excellent performance in direction control. According to the preparation method, the controllability is high, the sizes of the precious metal nanoparticles and the magnetic nanoparticles are adjustable, accurate regulation and control of the particle size of the magnetotactic nano motor can be achieved, and the requirements of different applications and preparation of nano motors of different sizes and different materials are met.

Description

technical field [0001] The invention relates to the technical field of nano device preparation, in particular to a magnetotactic nano motor and a preparation method thereof. Background technique [0002] A nanomotor is a nanoscale device that can convert other forms of energy into kinetic energy and move autonomously. There are few preparation methods of nanomotors reported so far, and the preparation of small-sized nanomotors (<200nm) faces greater challenges. In addition, due to the influence of Brownian motion and fluid disturbance, the control of the motion direction of small-sized nanomotors is also a big problem. The above problems greatly limit the application of nanomotors in the fields of biomedicine and micro-nano manipulation. Contents of the invention [0003] One of the objectives of the present invention is to provide a magnetotactic nanomotor, which is small in nanoscale size, has good motion performance and controllable motion direction, and has broad ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/01B82Y15/00B82Y30/00B82Y40/00
CPCH01F1/01B82Y15/00B82Y30/00B82Y40/00
Inventor 罗明杨自立王良梦官建国
Owner WUHAN UNIV OF TECH
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