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Half-metallic bismuth nanoribbon, half-metallic bismuth nanospheres and preparation method of half-metallic bismuth nanoribbon and half-metallic bismuth nanospheres

A bismuth nano and semi-metal technology, applied in the field of nanobelts and nanospheres and their preparation, to achieve the effect of less links, less experimental links, and less experimental raw materials

Inactive Publication Date: 2016-07-27
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can prepare nanobelts with a length of tens of micrometers, but this method needs to introduce surfactant polyvinylpyrrolidone (PVP) as a stabilizer and soft template to induce the formation of nanobelts

Method used

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  • Half-metallic bismuth nanoribbon, half-metallic bismuth nanospheres and preparation method of half-metallic bismuth nanoribbon and half-metallic bismuth nanospheres
  • Half-metallic bismuth nanoribbon, half-metallic bismuth nanospheres and preparation method of half-metallic bismuth nanoribbon and half-metallic bismuth nanospheres
  • Half-metallic bismuth nanoribbon, half-metallic bismuth nanospheres and preparation method of half-metallic bismuth nanoribbon and half-metallic bismuth nanospheres

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: Get 0.15g bismuth chloride and put into 30ml glycerin, magnetically stir 40min to make it mix evenly, use N 2 Blow the air for 10 minutes to remove the dissolved oxygen in the liquid. The prepared solution was transferred into the liner of the autoclave, and put into a blast drying oven for reaction, the reaction temperature was 200° C., and the reaction time was 12 hours. After the reaction was completed, it was cooled with the furnace, and the reactant was taken out, washed several times with absolute ethanol, filtered through a 450nm organic filter membrane, then dried under vacuum at low temperature, and samples were collected. Observation and testing are performed on the prepared sample using a scanning electron microscope and an X-ray diffractometer, according to X-ray diffraction (XRD) ( figure 1 ), where the ordinate is the relative intensity, and the abscissa is the diffraction angle. From the position and relative intensity of each diffraction p...

Embodiment 2

[0021] Embodiment 2: get 0.3g sodium nitrate and put into 40ml ethylene glycol, magnetic stirring 40min makes it mix evenly, with N 2 Blow the air for 10 minutes to remove the dissolved oxygen in the liquid. The prepared solution was transferred into the liner of the autoclave, and put into a blast drying oven for reaction, the reaction temperature was 150° C., and the reaction time was 24 hours. After the reaction was completed, it was cooled with the furnace, and the reactant was taken out, washed several times with absolute ethanol, filtered through an 800nm ​​organic filter membrane, then dried at low temperature under vacuum, and samples were collected. The prepared samples were observed and tested with a scanning electron microscope and an X-ray diffractometer. According to the X-ray diffraction (XRD) results, the prepared samples were pure bismuth. According to the scanning electron microscope (SEM) ( Figure 4 ), indicating the successful preparation of semimetallic ...

Embodiment 3

[0022] Embodiment 3: Get 0.15g sodium bismuthate and put it into 30ml glycerin, magnetically stir it for 40min to make it mix evenly, use N 2 Blow the air for 10 minutes to remove the dissolved oxygen in the liquid. The prepared solution was transferred into the liner of the autoclave, and put into a blast drying oven for reaction, the reaction temperature was 220° C., and the reaction time was 10 hours. After the reaction was completed, it was cooled with the furnace, and the reactant was taken out, washed several times with cyclohexane, filtered through a 1.2 μm organic filter membrane, then dried under vacuum at low temperature, and samples were collected. Observation and testing are performed on the prepared sample using a scanning electron microscope and an X-ray diffractometer, according to X-ray diffraction (XRD) ( figure 1 ), where the ordinate is the relative intensity, and the abscissa is the diffraction angle. From the position and relative intensity of each diffra...

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Abstract

The invention discloses a half-metallic bismuth nanoribbon, half-metallic bismuth nanospheres and a hydrothermal preparation method of the half-metallic bismuth nanoribbon and the half-metallic bismuth nanospheres. The half-metallic bismuth nanoribbon and the half-metallic bismuth nanospheres have half-metallicity. By changing the conditions such as the reaction time, the raw material ratio and surfactants, the shapes and sizes of the nanoribbon and the nanospheres can be adjusted and controlled. The bismuth nanoribbon is 30 nm to 5 microns wide and 5-50 microns long. The diameter of each half-metallic bismuth nanosphere is 20 um to 1 micron. The half-metallic bismuth nanoribbon and the half-metallic bismuth nanospheres can be applied to the fields of photoelectric materials, thermoelectric materials and microelectronic devices based on quantum confinement, the giant magnetoresistance effect, the Hall effect and the like. According to the half-metallic bismuth nanoribbon, the half-metallic bismuth nanospheres and the preparation method, the reducibility of a reaction solvent is utilized, other organic modifiers are not needed, the preparation method is simple, and the cost is low.

Description

[0001] Technical Field The present invention relates to a nanobelt and a nanosphere and a preparation method thereof, in particular to a semimetal bismuth nanobelt and a nanosphere and a preparation method thereof. Background technique [0002] As a semi-metallic material, bismuth has unique electronic properties and a small effective atomic mass (about 0.001m e ), low density of states, highly anisotropic Fermi surface, long mean free path of carriers (about 0.4mm at 4K) and high mobility. It is widely used in quantum confinement such as quantum wells and quantum wires, giant magnetoresistance effect, Hall effect research and related devices, and has great application value in optoelectronics, thermoelectric materials and microelectronics. [0003] At present, scientists have many reports on the preparation of metal bismuth nanowires by electrodeposition, but there are not many reports on the preparation of single crystal bismuth nanobelts. The liquid phase synthesis of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00
CPCB22F9/24B22F1/0551B22F1/054B22F1/065
Inventor 孔凤玉徐嘉垚宁伟田明亮
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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