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Preparation method and application of two-dimensional ultrathin Fe3O4 single crystal nanosheet

A single-crystal nanometer and ultra-thin technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., to achieve the effect of ultra-high photoresponsivity, performance improvement, and wide spectral response

Active Publication Date: 2020-06-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But currently Fe 3 o 4 The preparation of materials is limited to the growth of thin films and nanowires, for example, the use of radio frequency magnetron sputtering or pulsed laser deposition to prepare epitaxial ferromagnetic films, 3D nanoimprinting technology to prepare Fe 3 o 4 Nanowires

Method used

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  • Preparation method and application of two-dimensional ultrathin Fe3O4 single crystal nanosheet
  • Preparation method and application of two-dimensional ultrathin Fe3O4 single crystal nanosheet
  • Preparation method and application of two-dimensional ultrathin Fe3O4 single crystal nanosheet

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A two-dimensional ultra-thin Fe 3 O 4 The preparation method of monocrystalline nanosheets includes the following steps:

[0035] Step 1: Add 10mg of BiI 3 Powder placed in Al 2 O 3 In the quartz boat, place the quartz boat in the center of the first heating zone, place the naturally oxidized iron foil between the upper and lower mica sheets, and then place the mica sheet in the center of the second heating zone downstream of the quartz tube;

[0036] Step 2: Evacuate the inside of the quartz tube to below 1 Pa, and pass in 500 sccm of Ar gas to remove the residual air in the tube and keep the pressure in the tube at a normal pressure environment, and then continue to pass in Ar gas as the carrier gas at a flow rate of 50 sccm;

[0037] Step 3: Raise the second heating zone to 400°C, keep it for 20 minutes, then heat the first heating zone to 470°C, react for 10 minutes, cool to room temperature naturally after the reaction, take out the substrate, and then prepare the substrat...

Embodiment 2

[0041] Prepare two-dimensional ultra-thin Fe according to the steps of Example 1. 3 O 4 For single crystal nanosheets, only adjust the temperature of the first heating zone and the second heating zone in step 3 to 520°C and 420°C, respectively, and keep it for 1 hour, the other steps remain unchanged

[0042] Fe prepared in this example 3 O 4 The AFM scan of single crystal nanosheets is as follows Image 6 Shown.

Embodiment 3

[0044] A two-dimensional ultra-thin Fe 3 O 4 The preparation method of monocrystalline nanosheets includes the following steps:

[0045] Step 1: Add 10mg of BiI 3 Powder placed in Al 2 O 3 In the quartz boat, place the quartz boat in the center of the first heating zone, and place the mica substrate covered with naturally oxidized iron foil in the center of the second heating zone downstream of the quartz tube;

[0046] Step 2: Evacuate the inside of the quartz tube to below 1 Pa, and pass in 500sccm of Ar gas to remove the residual air in the tube and keep the pressure in the tube at a normal pressure environment, and then continue to pass in Ar gas as the carrier gas at a flow rate of 75sccm;

[0047] Step 3: Raise the second heating zone to 390℃, keep it for 20min, then raise the first heating zone to 460℃, react for 20min, cool to room temperature naturally after the reaction, take out the mica substrate, and then prepare it on the substrate The two-dimensional ultra-thin Fe 3 O ...

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Abstract

The invention provides a preparation method of a two-dimensional ultrathin non-layered Fe3O4 nanosheet and an application of the two-dimensional ultrathin non-layered Fe3O4 nanosheet to a long-wavelength infrared photoelectric detector, and belongs to the technical field of preparation of nano materials and devices. A chemical vapor deposition growth method is adopted, a naturally oxidized iron foil is used as a confinement means, and controllable growth of the high-quality two-dimensional ultrathin Fe3O4 nanosheet is realized by adjusting key factors such as growth temperature, airflow rate and the like. A photoelectric detector prepared on the basis of the grown Fe3O4 nanosheet has ultrahigh light response rate and ultra-wide spectral response, has high light response rate in a wide spectral range from near ultraviolet to long-wavelength infrared, and has a new breakthrough in the field of long-wavelength infrared photoelectric detection.

Description

Technical field [0001] The invention belongs to the technical field of nanomaterials and device preparation, and specifically relates to a two-dimensional ultrathin non-layered Fe 3 O 4 The preparation method of single crystal nanoplate and its application in long-wavelength infrared photodetector. Background technique [0002] Long-wavelength infrared (LWIR, long-wavelength infrared) photodetectors have important application values ​​in the fields of space communications, thermal imaging, biomedical optics, and remote sensing, and recent research progress has attracted much attention. The performance of long-wavelength infrared photodetectors largely depends on the nature of the material itself. At present, infrared photodetectors based on two-dimensional materials have received more and more attention due to their atomic-level ultra-thin thickness advantages and excellent performance in the field of room temperature detection. For example, graphene has the advantages of broad ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B25/02C30B29/16C30B29/64
CPCC30B25/02C30B29/16C30B29/64
Inventor 熊杰尹楚君龚传辉储隽伟晏超贻饶高峰汪洋陈心睿刘雨晴王显福
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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