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Method for realizing mono-disperse modification and optimal orientation array of hypovanadic oxide nano wire

A technology of preferred orientation and nanowires, which is applied in the field of nanomaterials and nanometers, can solve the problems of poor dispersion, affecting the use effect, inability to show surface area effect, volume effect and quantum size effect, etc., to achieve improved performance, good monodispersity and The effect of merit orientation

Inactive Publication Date: 2009-09-23
武汉理工力强能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of nanoparticles is very small, and its high surface energy makes it easy to agglomerate, poor dispersion, and the formation of secondary particles, which cannot show its favored surface area effect, volume effect and quantum size effect, which seriously affects its use. Effect

Method used

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  • Method for realizing mono-disperse modification and optimal orientation array of hypovanadic oxide nano wire
  • Method for realizing mono-disperse modification and optimal orientation array of hypovanadic oxide nano wire
  • Method for realizing mono-disperse modification and optimal orientation array of hypovanadic oxide nano wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Measure 50 ml of toluene and transfer it into a 100 ml beaker, add 1 mmol of stearic acid into it and stir vigorously, heat the beaker in a water bath at 90°C, and keep stirring until the stearic acid dissolves or melts; add 0.5 mmol of stearic acid to it. Moore VO 2 Nanowires were centrifuged after stirring for 1 hour, and washed with toluene to remove excess stearic acid to obtain stearic acid-modified VO 2 Nanowires;

[0021] 2. Weigh 10 grams of surfactant CTAB and transfer it to 80 ml of 1 beaker, add 40 ml of cyclohexane and 10 ml of deionized water; take 0.1 mmol of stearic acid-modified VO 2 The nanowires were ultrasonically dispersed in 10 ml of n-butanol for 5 minutes, then all of them were transferred into the above-mentioned cyclohexane solution, and stirred vigorously to obtain a black, clear and translucent microemulsion, which was centrifuged after continuous stirring for 2 hours, using a volume ratio of 1: Wash 10 times with 1 isooctane / chloroform m...

Embodiment 2

[0027] 1. Measure 40 ml of toluene and transfer it into a 100 ml beaker, add 0.8 mmol of stearic acid into it and stir vigorously, heat the beaker in a water bath at 70°C, and keep stirring until the stearic acid dissolves or melts; add 0.4 mmol of stearic acid to it. Moore VO 2 Nanowires, centrifuged after stirring for 0.5 hours, washed with toluene to remove excess stearic acid, and obtained stearic acid-modified VO 2 Nanowires;

[0028] 2. Weigh 8 grams of surfactant CTAB and transfer it to an 80-ml beaker, add 40 ml of cyclohexane and 10 ml of deionized water; take 0.08 mmol of stearic acid-modified VO 2 The nanowires were ultrasonically dispersed in 8 ml of n-butanol for 5 minutes, then all were transferred into the above-mentioned cyclohexane solution, and stirred vigorously to obtain a black, clear and translucent microemulsion, which was centrifuged after continuous stirring for 1.5 hours. The isooctane / chloroform mixed solvent washes 8 times;

[0029] 3. Treat the ...

Embodiment 3

[0033] 1. Measure 60 ml of toluene and transfer it into a 100 ml beaker, add 1.2 mmol of stearic acid into it and stir vigorously, heat the beaker in a water bath at 80°C, and keep stirring until the stearic acid dissolves or melts; add 0.6 mmol of stearic acid to it. Moore VO 2 Nanowires were centrifuged after stirring for 1.5 hours, and washed with toluene to remove excess stearic acid to obtain stearic acid-modified VO 2 Nanowires;

[0034] 2. Weigh 12 grams of surfactant CTAB and transfer it to an 80-ml beaker, add 40 ml of cyclohexane and 10 ml of deionized water; take 0.12 mmol of stearic acid-modified VO 2 The nanowires were ultrasonically dispersed in 12 ml of n-butanol for 5 minutes, then all of them were transferred into the above-mentioned cyclohexane solution, and stirred vigorously to obtain a clear and translucent microemulsion, which was centrifuged after continuous stirring for 2.5 hours, using a volume ratio of 1:1 The isooctane / chloroform mixed solvent wash...

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Abstract

The invention relates to a method for realizing the mono-disperse modification and the optimal orientation array of a hypovanadic oxide nano wire. The method is as follows: two-step surface function treatment is carried out on a VO2 nano wire by stearic acid and hexadecyl trimethyl ammonium bromide, thus the VO2 nano wire achieves mono-disperse in chloroform and does not precipitate in case of one-month standing; the obtained VO2 nano wire LB film realizes (001) crystal orientation array and local region orientation array, and has quasi-persistent photoconductivity and typical magnetic phase transition and paramagnetic property. The method has simple process, low requirements for equipment, good reproducibility, high controllable degree, meets environmental requirements, and is applicable to the assembly, the integration and the application of sensing, photoelectric and biological novel nano devices.

Description

technical field [0001] The invention relates to a method for realizing VO by using a common surfactant and a simple and feasible surface modification method 2 The monodisperse and preferred orientation arrangement of nanowires belongs to the field of nanomaterials and nanotechnology. Background technique [0002] In recent years, nanotechnology has developed vigorously, and the application of nanomaterials has attracted widespread attention in various fields. However, the particle size of nanoparticles is very small, and its high surface energy makes it easy to agglomerate, poor dispersion, and the formation of secondary particles, which cannot show its favored surface area effect, volume effect and quantum size effect, which seriously affects its use. Effect. Therefore, in practical applications, how to functionalize the surface of nanoparticles, avoid the agglomeration of nanoparticles, improve their dispersion, and arrange their preferred orientation and orderly assembl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
Inventor 麦立强陈文郭万里顾彦辉韩春华胡彬张鹏超徐林戴英
Owner 武汉理工力强能源有限公司
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