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Method for preparing Cd1-xCoxS dilute magnetic semiconductor nanoparticles by gas-liquid surface reaction

A cd1-xcoxs, dilute magnetic semiconductor technology, applied in chemical instruments and methods, cobalt compounds, inorganic chemistry, etc., can solve the problems of small saturation magnetization, affecting the quality of materials, and different particle sizes.

Inactive Publication Date: 2011-01-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional synthesis method of passing gas into liquid, due to the uneven dispersion of gas and different particle sizes, leads to poor crystal uniformity and large segregation of components in the crystal; this synthesis metho

Method used

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  • Method for preparing Cd1-xCoxS dilute magnetic semiconductor nanoparticles by gas-liquid surface reaction
  • Method for preparing Cd1-xCoxS dilute magnetic semiconductor nanoparticles by gas-liquid surface reaction
  • Method for preparing Cd1-xCoxS dilute magnetic semiconductor nanoparticles by gas-liquid surface reaction

Examples

Experimental program
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Effect test

Embodiment 2

[0033] Preparation of embodiment 2CdS semiconductor nanoparticles

[0034] First prepare the solution to be reacted: use deionized water and cadmium acetate to prepare the solution containing Cd 2+It is 10mmol / L cadmium ion solution; configure 0.001g / 200mL PVP solution with deionized water and polyvinylpyrrolidone (PVP); extract 10ml of cadmium ion solution, 1ml of PVP solution, and inject 39ml of deionized water into the same beaker to prepare into the liquid to be reacted. The beaker can be placed in the ultrasonic wave for a period of time to make the prepared reaction solution mix evenly. Pour the liquid to be reacted into the dripping funnel, turn on the cooling water at normal temperature, and perform a cooling cycle on the liquid to be reacted to reduce the temperature of the liquid to be reacted.

[0035] Place the reaction chamber in an ultrasonic environment under nitrogen carrying H 2 S enters the reaction chamber. Adjust the liquid to be reacted to make it drop...

Embodiment 3

[0038] Example 3Cd 1-x co x Preparation of S Diluted Magnetic Semiconductor Nanoparticles (1)

[0039] First prepare the solution to be reacted: use deionized water and cadmium acetate to prepare the solution containing Cd 2+ 10mmol / L cadmium ion solution; use deionized water and cobalt acetate to prepare Co 2+ 0.2mmol / L cobalt ion solution; use deionized water and PVP to configure 0.001g / 200mL PVP solution; extract 10ml of cadmium ion solution, 5ml of cobalt ion solution, 1ml of PVP solution, and 34ml of deionized water into the same beaker, Prepared to be reacted. The beaker can be placed in the ultrasonic wave for a period of time to make the prepared reaction solution mix evenly. The liquid to be reacted is poured into the dropping funnel, the cooling water at normal temperature is turned on, and the liquid to be reacted is cooled and circulated to lower the temperature of the liquid to be reacted.

[0040] Place the reaction chamber under the sonication environment. ...

Embodiment 4

[0044] Example 4Cd 1-x co x Preparation of S Diluted Magnetic Semiconductor Nanoparticles (2)

[0045] First prepare the solution to be reacted: use deionized water and cadmium acetate to prepare the solution containing Cd 2+ 10mmol / L cadmium ion solution; use deionized water and cobalt acetate to prepare Co 2+ The 2mmol / L cobalt ion solution is configured into a 0.001g / 200mL PVP solution with deionized water and PVP. Extract 10ml of cadmium ion solution, 1ml of cobalt ion solution, 1ml of PVP solution, and inject 38ml of deionized water into the same beaker to prepare the reaction solution. You can put the beaker into the ultrasonic wave for a period of time to make the prepared reaction solution mix evenly . The liquid to be reacted is poured into the dropping funnel, the cooling water at normal temperature is turned on, and the liquid to be reacted is cooled and circulated to lower the temperature of the liquid to be reacted.

[0046] The following reaction process and...

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Abstract

The invention discloses a method for preparing Cd1-xCoxS dilute magnetic semiconductor nanoparticles by a gas-liquid surface reaction, which belongs to the technical field of the preparation of Cd1-xCoxS dilute magnetic semiconductor nanoparticle materials. The gas-liquid surface reaction is carried out in a reaction chamber, a segment-shaped glass table with a spherical surface upward is put at the bottom in the reaction chamber, and the spherical surface is uniformly polished. The method comprises the following steps of: firstly, extracting solution of cadmium acetate, solution of cobalt acetate, solution of polyvinyl pyrrolidone (PVP) and de-ionized water, and uniformly mixing to obtain reaction liquid to be reacted; secondly, performing the gas-liquid surface reaction, introducing H2S gas into the reaction chamber and dropping the reaction liquid to be reacted on the spherical surface of the glass table; and finally, extracting solution after reaction and centrifugally washing with the de-ionized water and ethanol. The Cd1-xCoxS dilute magnetic semiconductor nanoparticles prepared by the method of the invention have high saturated magnetic strength and a uniform grain size.

Description

technical field [0001] The invention belongs to the technical field of preparation of dilute magnetic semiconductor nano particle materials. Involving Inorganic Synthesis of Cd Using Gas-Liquid Surface 1-x co x A method for dilute magnetic semiconductors. Background technique [0002] Diluted magnetic semiconductors (DMS) refer to magnetic semiconductors formed after some ions in non-magnetic semiconductors are replaced by transition metals (transition metals, TM) or rare earth elements. Diluted magnetic semiconductors have both semiconducting and magnetic properties, and can have two degrees of freedom of electronic charge and spin in one material. Diluted magnetic semiconductors can use the charge and spin characteristics of electrons to integrate the information processing of semiconductors with the information storage function of magnetic materials, the advantages of semiconductor materials and the non-volatility of magnetic materials. The most important feature of d...

Claims

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Application Information

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IPC IPC(8): C01G51/00
Inventor 张明喆胡婷婷宗兆存邹广田
Owner JILIN UNIV
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