Method for growing nanometer particles on substrate

A nanoparticle and nanoparticle technology, which is applied in the field of nanoparticle preparation, can solve the problems of increasing preparation cost and increasing process steps, and achieve uniform particle size, simplify the preparation process, and avoid agglomeration

Inactive Publication Date: 2015-11-25
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Application Information

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Problems solved by technology

Although this method is beneficial to prevent the agglomeration and growth of nano-alloy particles, it increases the process steps and increases the preparation cost.

Method used

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  • Method for growing nanometer particles on substrate
  • Method for growing nanometer particles on substrate
  • Method for growing nanometer particles on substrate

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) Take 0.1 mmol of cobalt acetylacetonate and 10 ml of alcohol, dissolve cobalt acetylacetonate in alcohol, mix well with ultrasonic assistance, and let stand for 10 minutes to obtain cobalt acetylacetonate solution;

[0035] (2) drop the cobalt acetylacetonate solution onto a clean glass sheet, and let it stand still to evaporate the alcohol, so that the cobalt acetylacetonate is evenly dispersed on the surface of the glass sheet;

[0036] (3) Put the glass sheet into the constant temperature zone of the tube furnace, raise the temperature to 300°C at a rate of 10°C / min, calcinate in an oxygen atmosphere, and keep it for 5min to obtain Co 2 o 3 of nanoparticles.

[0037] figure 1 is the Co obtained above 2 o 3 The TEM image of the nanoparticles, from which it can be seen that the nanoparticles are discretely distributed, uniformly dispersed, and uniform in particle size, with a particle size of 5-20nm.

Embodiment 2

[0039] (1) Take 0.1 mmol of cobalt acetylacetonate and platinum acetylacetonate, and 20 ml of alcohol, dissolve cobalt acetylacetonate and platinum acetylacetonate in alcohol, mix them uniformly with ultrasonic assistance, and let stand for 10 minutes to obtain a mixed solution;

[0040] (2) Take the mixed solution and drop it on a clean glass sheet, and let it stand still to evaporate the alcohol, so that cobalt acetylacetonate and platinum acetylacetonate are evenly dispersed on the surface of the glass sheet;

[0041] (3) put the glass piece into the constant temperature zone in the tube furnace for calcination, the calcination process is as follows: first feed inert gas N 2 , He or Ar to remove the air, and then inert gas and H 2 The mixed gas flow rate is 20ml / min, and then the temperature is raised to 500°C at a rate of 10°C / min, kept for 5min, and finally cooled to room temperature under the protection of the mixed atmosphere to obtain CoPt nanoparticles.

[0042] figu...

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Abstract

The invention provides a method for growing nanometer particles on a substrate. According to the method, a metal pecursor solution is carried on the surface of the substrate; after solvents are evaporated, the substrate carrying metal precursor particles is obtained; then, the substrate is subjected to direct high-temperature calcinations, so that the metal precursor particles are subject to thermolysis reaction to remove other elements except metal elements; finally, the substrate is cooled to the room temperature to obtain magnetic nanometer particles. Compared with the prior art, the method has the advantages that the agglomeration between the particles is effectively avoided; the uniformly scattered nanometer particles with uniform particle diameter are obtained; particularly, when the optimum calcination temperature is higher than the phase forming temperature during nanometer alloy particle preparation, the uniformly scattered metal nanometer particles with chemical and magnetic ordered phases can be obtained through one-step synthesis; the preparation process is greatly simplified; meanwhile, the particle agglomeration phenomenon in the annealing process is avoided.

Description

technical field [0001] The invention belongs to the technical field of nanoparticle preparation, in particular to a method for growing nanoparticle on a substrate. Background technique [0002] At present, the mainstream method for preparing nanoparticles is the high-temperature liquid-phase chemical synthesis method. This method is to dissolve the metal precursor in the reaction solvent, add a dispersant, etc., and after uniform mixing, heat up in a liquid-phase environment for chemical thermal decomposition. The liquid phase is then centrifuged to obtain nanoparticles. This method of liquid-phase synthesis of nanoparticles has been widely used. [0003] In addition, the above-mentioned high-temperature liquid-phase chemical synthesis method can also be used to prepare magnetic nano-alloy particles. For example, Sun, S. et al reported in the following documents 1 and 2 that in a certain reaction solvent, oleic acid and oleylamine were used as surfactants to prepare monodi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/30B82Y40/00
Inventor 杜娟边宝茹何江海张健夏卫星刘平闫阿儒
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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