NiO-based dilute magnetic semiconductor nanofiber and preparation method thereof

A dilute magnetic semiconductor and nanofiber technology, applied in the field of material science, can solve the problem of the lack of research reports on the one-dimensional structure of NiO dilute magnetic semiconductor

Active Publication Date: 2015-08-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few reports on the one-dimensional structure of NiO dilute magnetic semiconductors.

Method used

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  • NiO-based dilute magnetic semiconductor nanofiber and preparation method thereof
  • NiO-based dilute magnetic semiconductor nanofiber and preparation method thereof
  • NiO-based dilute magnetic semiconductor nanofiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Raw materials: analytically pure nickel acetate (Ni(Ac) 2 4H 2 O), ethanol, iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP) with a relative molecular mass of 1.3 million;

[0042] Prepare precursor solution: weigh 0.450g nickel acetate (Ni(Ac) 2 4H 2 O), 0.023g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 0.002g lithium nitrate (LiNO 3 ). Nickel acetate (Ni(Ac) 2 4H 2 O), join in the ethanol, stir about half an hour to dissolve completely, the solution is light green. Then add iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP), and stirred for 10 hours to obtain a uniform and viscous precursor solution. The molar ratio of nickel, iron, and lithium in the precursor solution was 95:3:2.

[0043] Electrospinning: put the prepared precursor solution into a 10ml needle tube, use a No. 7 injection needle (needle tip ground flat), the spinning voltage is 13.5kV, and the receiving distance is...

Embodiment 2

[0046] Raw materials: analytically pure nickel acetate (Ni(Ac) 2 4H 2 O), ethanol, iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP) with a relative molecular mass of 1.3 million;

[0047] Prepare precursor solution: weigh 0.45g nickel acetate (Ni(Ac) 2 4H 2 O), 0.024g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 0.05g lithium nitrate (LiNO 3 ). Nickel acetate (Ni(Ac) 2 4H 2 O), join in the ethanol, stir about half an hour to dissolve completely, the solution is light green. Then add iron nitrate (Fe(NO 3 ) 3 9H 2 O, lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP), and stirred for 10 hours to obtain a uniform and viscous precursor solution. The molar ratio of nickel, iron, and lithium in the precursor solution was 93:3:4.

[0048] Electrospinning: The method of this step is the same as that in Example 1.

[0049] Through the above method, NiO-based nanofibers can be obtained. The fiber can be expressed as Li 0.04 Ni 0.93...

Embodiment 3

[0051] Raw materials: analytically pure nickel acetate (Ni(Ac) 2 4H 2 O), ethanol, iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP) with a relative molecular mass of 1.3 million;

[0052] Prepare precursor solution: weigh 0.45g nickel acetate (Ni(Ac) 2 4H 2 O), 0.024g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 0.008g lithium nitrate (LiNO 3 ). Nickel acetate (Ni(Ac) 2 4H 2 O), join in the ethanol, stir about half an hour to dissolve completely, the solution is light green. Then add iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3), polyvinylpyrrolidone (PVP), and stirred for 10 hours to obtain a uniform and viscous precursor solution. The molar ratio of nickel, iron, and lithium in the precursor solution was 91:3:6.

[0053] Electrospinning: The method of this step is the same as that in Example 1.

[0054] Through the above method, NiO-based nanofibers can be obtained, which can be expressed as Li 0.06 Ni 0.91 Fe ...

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Abstract

The invention provides a NiO-base diluted magnetic semiconductor nano-fiber and a preparation method of the NiO-base diluted magnetic semiconductor nano-fiber. The NiO-base diluted magnetic semiconductor nano-fiber is doped with iron and lithium. A method for preparing the NiO-base diluted magnetic semiconductor nano-fiber comprises the following steps of: preparing a precursor solution, and performing electrostatic spinning through the precursor solution so as to obtain a precursor; and sintering the precursor so as to obtain the NiO-base diluted magnetic semiconductor nano-fiber, wherein the precursor solution is an organic solution containing a nickel element, an iron element, a lithium element and polyvinylpyrrolidone. The NiO-base diluted magnetic semiconductor nano-fiber in a one-dimensional structure can be prepared through the method, and the room-temperature magnetism of the nano-fiber can be improved by doping the iron element and the lithium element.

Description

technical field [0001] The present invention relates to the field of materials science. Specifically, the present invention relates to NiO-based diluted magnetic semiconductor nanofibers and a preparation method thereof. Background technique [0002] In the traditional information industry, semiconductor materials often only use the degree of freedom of electron charge to work, while ignoring the other degree of freedom of electrons, which is spin. In fact, the electron's spin also carries a large amount of usable information. One way to effectively utilize the spin characteristics of electrons is to dope a small amount of transition metal magnetic elements into the semiconductor, so that a current with a certain degree of spin polarization can be obtained in the semiconductor material, so that the electrical properties of the material can be affected by the magnetic field. regulation. Through this method, we can make full use of the two properties of electrons, break thr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08D01F9/10D01D5/00
Inventor 林元华罗屹东张玉骏南策
Owner TSINGHUA UNIV
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