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A low-power hydrogen detection method and its device and preparation method

A detection device and low power consumption technology, which is applied in the field of low power consumption hydrogen detection method and its device and preparation, can solve the problems such as the difficulty of miniaturization of the detection system, and meet the requirements of miniaturization of sensing, excellent hydrogen sensitivity characteristics, small The effect of power consumption

Active Publication Date: 2021-11-16
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the hydrogen detection technology based on the different refractive index properties of palladium metal before hydrogen absorption and after hydrogen evolution, it is necessary to introduce an additional optical module to detect the change of the refractive index; due to the introduction of the optical module, it is difficult to miniaturize the detection system, and the introduction of additional power consumption

Method used

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  • A low-power hydrogen detection method and its device and preparation method
  • A low-power hydrogen detection method and its device and preparation method
  • A low-power hydrogen detection method and its device and preparation method

Examples

Experimental program
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Embodiment 1

[0040] A method for preparing a hydrogen detection device with low power consumption, comprising the following steps:

[0041] S1. Select monocrystalline silicon as the substrate, and use acetone, ethanol, and deionized water to clean it ultrasonically in sequence.

[0042] S2. The spin-polarized layer is prepared by mechanical transfer method, specifically, the topological insulator Bi is dissociated using adhesive tape 2 Se 3 A thin-layer topological insulator is obtained as a bulk material, and transferred to a single-crystal silicon substrate. The prepared thin-layer topological insulator has a thickness of 10-100 nm, a length of 10-50 μm, and a width of 5-30 μm.

[0043] S3. The barrier layer is prepared by a mechanical transfer method. Specifically, the graphene block is dissociated using adhesive tape to obtain a single-layer graphene, which is transferred to a topological insulator. The prepared single-layer graphene has a length of 10-50 μm and a width of 5 μm. -30 ...

Embodiment 2

[0047] A method for preparing a hydrogen detection device with low power consumption, comprising the following steps:

[0048] S1. Select monocrystalline silicon as the substrate, and use acetone, ethanol, and deionized water to clean it ultrasonically in sequence.

[0049] S2. The spin-polarized layer is prepared by mechanical transfer method, specifically, using adhesive tape to dissociate ferromagnetic metal Fe 3 GeTe 2 The bulk material is to obtain a thin layer of ferromagnetic metal, which is transferred to a single crystal silicon substrate. The thickness of the prepared thin layer of ferromagnetic metal is 10-100 nm, the length is 10-50 μm, and the width is 5-30 μm.

[0050] S3. The barrier layer is prepared by a mechanical transfer method. Specifically, a boron nitride block is dissociated using an adhesive tape to obtain a few-layer boron nitride, which is transferred to a ferromagnetic metal. The prepared graphene has a length of 10-50 μm and a width of 5-30 μm. ...

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Abstract

The invention discloses a hydrogen detection method with low power consumption, a device and a preparation method thereof. The detection method utilizes that the spin-orbit coupling strength of palladium metal before and after hydrogen absorption is different, and the different spin-orbit coupling strengths are obtained by inverse The spin Hall effect is manifested, that is, through the heterostructure of the palladium metal and the spin-polarized layer, the spin signal in the spin-polarized layer will spontaneously generate different current signals in the palladium metal layer, realizing hydrogen detection. The spin current in the spin-polarized layer has the property of non-dissipation in theory, and the current in the palladium metal layer is formed spontaneously without introducing a power supply, thus reducing the power consumption of hydrogen detection and meeting the sensing requirements. The goal of miniaturization. The present invention not only utilizes the spin-orbit coupling effect of the palladium metal layer, but also utilizes the excellent hydrogen sensitivity characteristics of the palladium metal layer. Due to the characteristics of no spin dissipation, the hydrogen detection method with this structure can obtain smaller work consumption.

Description

technical field [0001] The invention belongs to the technical field of spintronic devices, and in particular relates to a method for detecting hydrogen with low power consumption, a device and a preparation method thereof. Background technique [0002] With the rapid development of spintronics, the spin-orbit coupling effect has attracted more and more attention. There are more and more international reports on various novel physical phenomena caused by the spin-orbit coupling effect in related materials, such as Spin (inverse spin) Hall effect, spin field effect transistor, spin quantum computing, etc. [0003] The spin-orbit coupling effect provides an all-electric (no external magnetic field or magnetic material) method to control the spin. With the deepening of theoretical research and the development of experimental technology, various electronic devices based on the spin-orbit coupling effect emerge in endlessly. , will also bring greater practical application value. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30G01N27/407B82Y30/00B82Y15/00
CPCB82Y15/00B82Y30/00G01N27/308G01N27/4071
Inventor 张敏昊宋凤麒曹路张同庆
Owner NANJING UNIV