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Mesoporous silica nanomotor, and preparation method and application thereof

A kind of mesoporous silica and nanotechnology, which is applied in the direction of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problem of large motor size, etc., and achieve the effect of large synthesis amount, simple operation and low cost

Inactive Publication Date: 2013-04-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve the technical problem of the large size of the existing motors, and provide mesoporous silica nanomotors and their preparation methods and applications

Method used

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  • Mesoporous silica nanomotor, and preparation method and application thereof
  • Mesoporous silica nanomotor, and preparation method and application thereof
  • Mesoporous silica nanomotor, and preparation method and application thereof

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Experimental program
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specific Embodiment approach 1

[0026] Embodiment 1: The mesoporous silica nanomotor of this embodiment is a mesoporous silica particle with a particle diameter of 50-90 nm and partially covered with a metal platinum layer.

[0027] The mesoporous silica nanomotor of this embodiment not only has an asymmetric mesoporous silica structure, but also has obvious yin and yang characteristics, a part of which has a metal layer with a catalytic function, and the other part has a mesoporous structure. The loaded substances can be loaded in the mesopores of silica nanoparticles, and hydrogen peroxide is catalyzed to generate oxygen bubbles as a driving force, so that they can move in the solution containing hydrogen peroxide and transport the loaded substances to the destination. The mesoporous silica nanomotor can not only be used to transport materials, but also has spontaneous transport power.

specific Embodiment approach 2

[0028] Embodiment 2: The preparation method of the mesoporous silica nanomotor described in Embodiment 1 is carried out in the following steps:

[0029] 1. Synthesis of mesoporous silica nanoparticles with a particle size of 50-90nm;

[0030] 2. Silicon wafer cleaning and hydrophilic treatment: first place the silicon wafer in acetone and alcohol for ultrasonic cleaning, then rinse it with deionized water, dry it with nitrogen, and then put the silicon wafer into concentrated sulfuric acid In a mixed solution with hydrogen peroxide, heat to a temperature of 60°C to 70°C and keep it for 2 to 3 hours, then take out the silicon wafer, rinse it with deionized water and dry it to obtain a hydrophilic silicon wafer, in which concentrated sulfuric acid The mixed solution with hydrogen peroxide is formed by mixing concentrated sulfuric acid with a mass concentration of 95% to 98% and hydrogen peroxide with a mass concentration of 20% to 30% in a volume ratio of (2 to 3): 1 ;

[0031...

specific Embodiment approach 3

[0035] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the preparation method of step one mesoporous silica particles is carried out according to the following steps: first dissolve 0.25g~0.5g cetyltrimethylammonium bromide In 150mL~180mL of deionized water, add 1mL~2.0ml of sodium hydroxide solution with a concentration of 2mol / L~4mol / L, mix well and heat to 60~80℃, then add 1.5~2.0mL of ethyl orthosilicate After the reaction mixture was stirred at 60-80°C for 2-4 hours, the product was washed with methanol and deionized water, and vacuum-dried at 40-70°C for 10-12 hours to obtain mesoporous silica particle. Others are the same as in the second embodiment.

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Abstract

The invention discloses a mesoporous silica nanomotor, and a preparation method and the application thereof, relates to a motor, a preparation method and the application thereof, and aims at solving the technical problem of large size of the existing motor. The mesoporous silica nanomotor adopts mesoporous silica particles with the particle sizes of 50 to 90 nm, and a platinum layer is sputtered on the partial surface of the nanomotor. The preparation method comprises the following steps: firstly, synthesizing mesoporous silica nanoparticles, secondly, performing hydrophilic treatment to silicon chips, thirdly, dripping silicon dioxide nanoparticle dispersion liquid onto the hydrophilic silicon chips, drying, and sputtering platinum onto the silicon chips, on which a single-particle layer is arranged, obtained in step III, and fourthly, drying after ultrasonic vibration for shaking off, so as to obtain the mesoporous silica nanomotor. The application is to put the mesoporous silica nanomotor into hydrogen peroxide solution to be used. The nanomotor has Yin and Yang structural characteristics and a carrying function, the preparation method is simple to operate, and the primary synthetic amount is large. The mesoporous silica nanomotor can be applied to fields of biomedical, chemical and environment detection.

Description

technical field [0001] The invention relates to a preparation method and application of a nanomotor. Background technique [0002] Nanoscale artificial motors are a new research hotspot in the field of nanoscience in recent years. By catalyzing hydrogen peroxide to generate oxygen bubbles as a driving force, they can swim in a solution containing hydrogen peroxide. Although various motors can be prepared by electrochemical deposition, supramolecular assembly, metal sputtering deposition and other methods, it is difficult to expand their size below 100nm. The development of nanomotors in the true sense will undoubtedly greatly expand the application range of nanomotors. Nanomotors with catalytic capabilities (especially nanometer-sized motors) have broad applications in biological research, medical drug delivery and release, and environmental detection. prospect. Contents of the invention [0003] The present invention aims to solve the technical problem of the large size...

Claims

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Application Information

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IPC IPC(8): B82B1/00B82B3/00B82Y15/00B82Y40/00
Inventor 贺强玄明君
Owner HARBIN INST OF TECH
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