CN115036379A - Molybdenum disulfide barium titanate composite nano-roll photoelectric detector and preparation method thereof - Google Patents
Molybdenum disulfide barium titanate composite nano-roll photoelectric detector and preparation method thereof Download PDFInfo
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- 229910002113 barium titanate Inorganic materials 0.000 title claims abstract description 86
- 239000002131 composite material Substances 0.000 title claims abstract description 69
- GNSPRPNBTNBGQR-UHFFFAOYSA-N [Mo](=S)=S.[Ba] Chemical compound [Mo](=S)=S.[Ba] GNSPRPNBTNBGQR-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 52
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 claims abstract description 51
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 28
- 239000002105 nanoparticle Substances 0.000 claims abstract description 23
- 239000002356 single layer Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000004528 spin coating Methods 0.000 claims description 28
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 24
- 239000010408 film Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 238000010438 heat treatment Methods 0.000 claims description 16
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 14
- 239000010410 layer Substances 0.000 claims description 13
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
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- 238000001035 drying Methods 0.000 claims description 12
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- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 12
- 235000012239 silicon dioxide Nutrition 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 10
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- 238000009210 therapy by ultrasound Methods 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
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- 239000007789 gas Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 239000012159 carrier gas Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- -1 polydimethylsiloxane Polymers 0.000 claims description 3
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- WOVADLWDGDABII-UHFFFAOYSA-N [Ba].[Mo] Chemical compound [Ba].[Mo] WOVADLWDGDABII-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
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- 239000002052 molecular layer Substances 0.000 description 1
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Abstract
The invention belongs to the technical field of semiconductor photoelectric detection, and provides a molybdenum disulfide barium titanate composite material nano-roll photoelectric detector and a manufacturing method thereof, wherein the method comprises the following four steps: (1) preparing a single-layer molybdenum disulfide film; (2) preparing a molybdenum disulfide barium titanate composite material; (3) preparing a molybdenum disulfide barium titanate composite material nano roll; (4) preparing a photoelectric detector based on the material in (3). By introducing the barium titanate nanoparticles and the molybdenum disulfide to construct the nano-coil structure after compounding, the light responsivity of the molybdenum disulfide can be remarkably improved, and the photoelectric detector with high light responsivity is obtained. Meanwhile, the detector has good environmental stability, the used raw materials are green and environment-friendly, the used equipment is simple, the preparation is easy, the cost is low, and the large-scale preparation is easy.
Description
Technical Field
The invention relates to the technical field of semiconductor photoelectric detection, in particular to a molybdenum disulfide barium titanate composite nano-roll photoelectric detector and a preparation method thereof.
Background
Semiconductor photodetectors have long been mature for a wide range of applications and have become one of the core device classes in modern industry and science. The monolayer molybdenum disulfide is taken as a typical two-dimensional semiconductor material, has the characteristics of direct band gap, adjustable band gap width, single molecular layer thickness, environmental stability and the like, and shows excellent performance in the field of photoelectric detection. The conversion of the two-dimensional nano-sheet into the one-dimensional nano-roll structure is a promising method for further expanding the application of the two-dimensional nano-sheet in the processes of battery, sensing, filtering and photocatalysis. The one-dimensional nano-roll structure not only retains the excellent performance of a two-dimensional matrix, but also shows new characteristics brought by one-dimensional geometric arrangement. Due to its unique tubular structure, it exhibits unusual electronic, mechanical and optical properties compared to the matrix nanoplatelets. Due to the existence of quenching effect, the photoelectric detector prepared by pure molybdenum disulfide material has lower light responsivity, which hinders the further development of the photoelectric detector in the photoelectric field. Barium titanate is an important dielectric material, can be used for catalysis and light capture, has a direct band gap of about 3.2eV, and can remarkably improve the light responsivity of molybdenum disulfide by compounding with a molybdenum disulfide nano coil. The invention discloses a photoelectric detector based on a molybdenum disulfide barium titanate composite nano coil and a preparation method thereof. A new structure is constructed by introducing barium titanate nanoparticles and molybdenum disulfide nanocoils in a composite mode, and the performance of the detector is improved. The interaction between the barium titanate nano-particles and light is utilized to improve the absorption of the material to the light, thereby improving the responsiveness. The photoelectric detector prepared by the method has the advantages of simple structure and high responsivity.
Molybdenum disulfide shows a strong photoluminescence effect in a visible light waveband, however, due to the nanometer thickness of a single layer of molybdenum disulfide, only 5-10% of visible light can be absorbed, and a photoelectric detector prepared from a single layer of molybdenum disulfide material has low light responsivity, which limits the wide application of the photoelectric device on high performance.
Disclosure of Invention
Aiming at the defect of low light responsivity of a single-layer molybdenum disulfide photoelectric detector in the prior art, the invention provides a photoelectric detector of a molybdenum disulfide barium titanate composite material nano roll and a preparation method thereof.
The invention discloses a preparation method of a molybdenum disulfide barium titanate composite nano-coil photoelectric detector, which comprises the following steps:
preparing a single-layer molybdenum disulfide film;
preparing a molybdenum disulfide barium titanate composite material in the step (2): placing barium titanate nanoparticles in an organic volatile solution, performing ultrasonic treatment until the barium titanate nanoparticles are uniformly dispersed, spin-coating a dispersion liquid on a molybdenum disulfide film, and drying to obtain a molybdenum disulfide barium titanate composite material;
preparing a molybdenum disulfide barium titanate composite material nano roll;
and (4) transferring the metal electrode to the molybdenum disulfide barium titanate composite material nano roll prepared in the step (3) to obtain the photoelectric detector.
Preferably, the step (3) is specifically:
and (3) dripping a sodium bicarbonate solution on the surface of the barium molybdenum disulfide titanate composite material prepared in the step (2), heating, washing with deionized water, and drying with nitrogen to obtain the barium molybdenum disulfide titanate composite material nano coil.
Preferably, the concentration of the sodium bicarbonate solution is 0.2-1M, the heating temperature is 30-70 ℃, and the heating time is 5-90 s.
Preferably, the step (4) is specifically:
fumigating the metal electrode with hexamethyldisilazane, spin-coating polymethyl methacrylate solution on the metal electrode,
and (3) enabling the metal electrode to fall off by using polydimethylsiloxane and transferring the metal electrode to the nano coil to obtain the molybdenum disulfide barium titanate composite nano coil photoelectric detector.
Preferably, the step (2) is specifically:
the barium titanate nano-particles with the particle size of 100nm are placed in isopropanol solution for ultrasonic treatment until the barium titanate nano-particles are uniformly dispersed, the concentration of the dispersion liquid is 0.1M,
spin coating the dispersion on a two-dimensional molybdenum disulfide film at a spin coating speed of 500r min -1 The spin coating time is 10s, and the rotating speed is increased to 5000 r.min -1 And spin-coating for 60s, and drying to obtain the molybdenum disulfide barium titanate composite material.
Preferably, in the step (1), the manner of preparing the monolayer molybdenum disulfide thin film is as follows: a Chemical Vapor Deposition (CVD) method is used for growing a two-dimensional molybdenum disulfide film on a silicon dioxide substrate to prepare a single-layer molybdenum disulfide film.
Preferably, the specific process for growing the two-dimensional molybdenum disulfide film on the silicon dioxide substrate by using a Chemical Vapor Deposition (CVD) method comprises the following steps: 5mg of molybdenum trioxide powder is placed at the downstream of a quartz tube of the tube furnace, 500mg of sulfur powder is placed at the upstream of the quartz tube of the tube furnace, and the temperature is 50 ℃ min -1 The temperature rise rate of (2) increases the temperature of the molybdenum trioxide to 900 ℃ and maintains the temperature for 2min, and when the temperature rises to 600 ℃, the temperature is increased to 30 ℃ per min -1 Heating the sulfur powder to 180 ℃, introducing 80sccm argon gas as a carrier gas in the reaction process, and naturally cooling the tubular heating furnace to room temperature after the reaction is finished.
The invention also discloses a preparation method of the molybdenum disulfide barium titanate composite nano-roll photoelectric detector, and the prepared molybdenum disulfide barium titanate composite nano-roll photoelectric detector.
The invention also discloses a photoelectric detector based on the molybdenum disulfide barium titanate composite material nano coil, which comprises an insulating medium layer, a molybdenum disulfide barium titanate composite material nano coil layer and metal electrodes which are arranged on the molybdenum disulfide barium titanate composite material nano coil layer at intervals.
Compared with the prior art, the technical scheme of the invention is different and can obtain the following beneficial effects:
(1) compared with a molybdenum disulfide thin film photoelectric detector, the photoelectric detector has higher light responsivity. By introducing the interaction between the barium titanate nanoparticles and the molybdenum disulfide film, the heterojunction with a novel energy band structure is constructed, so that the photoelectric detection capability of molybdenum disulfide can be effectively improved. Based on the nano scroll structure of the heterojunction, light can penetrate into the scroll layer, and photocurrent is generated in each nano scroll layer, so that the light response capability of molybdenum disulfide is further improved by utilizing the characteristic.
(2) Compared with a molybdenum disulfide film photoelectric detector, the photoelectric detector has better environmental stability. Because the monolayer molybdenum disulfide film has a large specific surface area, the monolayer molybdenum disulfide film can fully adsorb gas molecules, and the gas molecules can reduce the photoresponse of molybdenum disulfide to a great extent. And the one-dimensional nanometer scroll structure enables the interior to be more stable than a molybdenum disulfide film due to self-sealing property, and has better environmental stability.
(3) The method for self-assembling the nano coil by using the capillary force to drive the material has the advantages of green and environment-friendly raw materials, simple used equipment, easy preparation, low cost and easy large-scale preparation.
(4) Although the prior art has a precedent of compounding molybdenum disulfide and barium titanate, the application of the molybdenum disulfide and barium titanate is a photocatalytic material, which is different from the technical field of photoelectric detection in the invention.
(5) Compared with the prior art, the process is more complex, the barium titanate nano particles and the molybdenum disulfide nano rolls are introduced to be compounded in the field of photoelectric detection, and the problem of how the barium titanate nano particles are compounded with the molybdenum disulfide nano rolls must be solved in the process, so that the process method for spin-coating the barium titanate nano particles is provided, and the introduction of the spin-coating process brings a gain effect.
(6) In the prior art, a solution providing a driving force for curling a two-dimensional material is an ethanol solution, and the invention adopts alkaline solutions such as a sodium bicarbonate solution and the like, because after barium titanate particles are introduced, the large mass of barium titanate prevents a molybdenum disulfide film after the barium titanate particles are spin-coated from rolling up, and the alkaline solutions such as sodium bicarbonate and the like can well solve the problem.
Drawings
In order to illustrate more clearly the embodiments of the invention or solutions in the prior art, reference will now be made briefly to the attached drawings, which are included to describe the embodiments of the invention or solutions in the prior art, and in which some specific embodiments of the invention will be described in detail, by way of example and not by way of limitation, with reference to the attached drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural diagram of a nanoscroll photodetector based on a barium molybdenum disulfide titanate composite material according to the present invention. Wherein 1 is an insulating substrate, 2 is a nano coil prepared from molybdenum disulfide, 3 is a metal electrode, and 4 is barium titanate nano particles wrapped in the molybdenum disulfide nano coil.
Fig. 2 is a flow chart of a method for manufacturing a nanoscroll photodetector based on a barium molybdenum disulfide titanate composite material according to the present invention.
Figure 3 is an optical microscope photograph of a barium molybdenum disulfide titanate composite nanocoil in an embodiment of the present invention.
FIG. 4 is a scanning electron microscope image of a barium molybdenum disulfide titanate composite nanocolloid in an embodiment of the present invention.
Fig. 5 is a comparison of the optical responsivity of the barium-titanate-molybdenum-disulfide-based composite nano-roll photodetector and the molybdenum-disulfide-based thin-film photodetector in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application.
Detailed description of the preferred embodiment 1
(1) Preparing a two-dimensional molybdenum disulfide film: and growing a two-dimensional molybdenum disulfide film on the silicon dioxide substrate by using a Chemical Vapor Deposition (CVD) method. 5mg of molybdenum trioxide powder is placed at the downstream of a quartz tube of the tube furnace, 500mg of sulfur powder is placed at the upstream of the quartz tube of the tube furnace, and the temperature is 50 ℃ min -1 The temperature rise rate of the molybdenum trioxide is increased from 550 ℃ to 900 ℃, and the molybdenum trioxide is kept for 2min, when the temperature rises to 600 DEG CAt 30 ℃ min -1 The sulfur powder was warmed from room temperature to 180 ℃. In the reaction process, argon gas of 80sccm is introduced as a carrier gas. And after the reaction is finished, naturally cooling the tubular heating furnace to room temperature.
(2) Preparing a molybdenum disulfide barium titanate composite material: placing barium titanate nanoparticles with the particle size of 100nm in isopropanol solution for ultrasonic treatment until the barium titanate nanoparticles are uniformly dispersed, wherein the concentration of a dispersion liquid is 0.1M, spin-coating the dispersion liquid on a two-dimensional molybdenum disulfide film, and the spin-coating rotating speed is 500 r-min -1 The time of spin coating is 10 seconds, and then the rotating speed is increased to 5000 r.min -1 And spin-coating for 60 seconds, and drying to obtain the molybdenum disulfide barium titanate composite material.
(3) Preparing a molybdenum disulfide barium titanate composite nanocoil: and (3) dripping a drop of sodium bicarbonate solution on the surface of the molybdenum disulfide barium titanate composite material prepared in the step (2), wherein the concentration of the solution is 0.6M, heating for one minute at the temperature of 60 ℃, then washing with deionized water, and drying with nitrogen to obtain the molybdenum disulfide barium titanate composite material nano coil. The optical microscope image and the scanning electron microscope image of the prepared molybdenum disulfide barium titanate composite nanocolloid are shown in fig. 3 and 4, and the nanocolloid prepared by the method is moderate in size, complete in appearance and obvious in linearity.
(4) Preparing a photoelectric detector: and (4) transferring the metal electrode to the molybdenum disulfide barium titanate composite material nano roll in the step (3). Firstly, fumigating a metal electrode by hexamethyldisilazane, spin-coating a polymethyl methacrylate solution on the metal electrode, and then transferring the metal electrode onto the nano roll by dropping the metal electrode by using polydimethylsiloxane to obtain the molybdenum disulfide barium titanate composite nano roll photoelectric detector. The light responsivity is shown in figure 5, and compared with a molybdenum disulfide film-based photoelectric detector, the light responsivity is obviously improved.
It should be noted that the particle size of the barium titanate nanoparticles used in this embodiment is between 10-200nm, the organic volatile solution includes, but is not limited to, ethanol, ethylene glycol, isopropanol, acetone, etc., and the spin-coating rotation speed is 2000-8000 r.min -1 Within the scope, the purposes of the invention can be achieved and the effects are similar.
The structure of the generated photoelectric detector based on the molybdenum disulfide barium titanate composite material nano roll is shown in fig. 1, and the photoelectric detector comprises an insulating medium layer, a molybdenum disulfide barium titanate composite material nano roll layer and metal electrodes which are arranged on the molybdenum disulfide barium titanate composite material nano roll layer at intervals, wherein the insulating medium layer, the molybdenum disulfide barium titanate composite material nano roll layer and the metal electrodes are sequentially stacked from bottom to top.
Specific example 2
Steps (1), (4) are the same as in embodiment 1, and steps (2) and (3) are replaced with:
(2) preparing a molybdenum disulfide barium titanate composite material: placing barium titanate nanoparticles with the particle size of 100nm in isopropanol solution for ultrasonic treatment until the barium titanate nanoparticles are uniformly dispersed, wherein the concentration of a dispersion liquid is 0.01M, spin-coating the dispersion liquid on a two-dimensional molybdenum disulfide film, and the spin-coating rotating speed is 500 r.min -1 The time of spin coating is 10 seconds, and then the rotating speed is increased to 5000 r.min -1 And spin-coating for 60 seconds, and drying to obtain the molybdenum disulfide barium titanate composite material.
(3) Preparing a molybdenum disulfide barium titanate composite nanocoil: and (3) dripping a drop of sodium bicarbonate solution on the surface of the barium molybdenum disulfide titanate composite material prepared in the step (2), heating the solution at the temperature of 30 ℃ for 90 seconds, washing the solution with deionized water, and drying the solution with nitrogen to obtain the barium molybdenum disulfide titanate composite material nano roll.
Specific example 3
Steps (1), (4) are the same as in embodiment 1, and steps (2) and (3) are replaced with:
(2) preparing a molybdenum disulfide barium titanate composite material: placing barium titanate nanoparticles with the particle size of 100nm in isopropanol solution for ultrasonic treatment until the barium titanate nanoparticles are uniformly dispersed, wherein the concentration of a dispersion liquid is 0.2M, spin-coating the dispersion liquid on a two-dimensional molybdenum disulfide film, and the spin-coating rotating speed is 500 r-min -1 The time of spin coating is 10 seconds, and then the rotating speed is increased to 5000 r.min -1 And spin-coating for 60 seconds, and drying to obtain the molybdenum disulfide barium titanate composite material.
(3) Preparing a molybdenum disulfide barium titanate composite nanocoil: and (3) dripping a drop of sodium bicarbonate solution on the surface of the barium molybdenum disulfide-titanate composite material prepared in the step (2), heating the solution at the concentration of 1M at 70 ℃ for 5 seconds, washing the solution with deionized water, and drying the solution with nitrogen to obtain the barium molybdenum disulfide-titanate composite material nano roll.
Analysis of the above specific embodiments 1 to 3 shows that the effect of the composite material roll is not good when the capillary force is too small when the sodium bicarbonate solution is 0.1M, 90 seconds are required for 30 ℃ heating at 0.2M, 20 seconds are required for 30 ℃ at 1M, and 5 seconds are required for 70 ℃, but the molybdenum disulfide film is easily torn when the capillary force is too large, so that the obtained nano tape measure has a small size, 1M is close to the saturated concentration of sodium bicarbonate at normal temperature, the sodium bicarbonate is precipitated and crystallized due to evaporation of water during heating, the difficulty of the subsequent process is increased, and 1M is generally not adopted. However, whatever concentration is chosen, the final rolling effect is the same, with the difference that the time to obtain the nanocolloid is different.
Analyzing fig. 5, it can be seen that, compared with the photoelectric detector based on the molybdenum disulfide thin film, the photoelectric detector based on the molybdenum disulfide barium titanate composite material nano-volume light has significantly improved light responsivity.
The above description is only a part of the embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (9)
1. The preparation method of the molybdenum disulfide barium titanate composite nano-roll photoelectric detector is characterized by comprising the following steps of:
preparing a single-layer molybdenum disulfide film;
preparing a molybdenum disulfide barium titanate composite material in the step (2): placing barium titanate nanoparticles in an organic volatile solution, performing ultrasonic treatment until the barium titanate nanoparticles are uniformly dispersed, spin-coating a dispersion liquid on a molybdenum disulfide film, and drying to obtain a molybdenum disulfide barium titanate composite material;
preparing a molybdenum disulfide barium titanate composite material nano roll;
and (4) transferring the metal electrode to the molybdenum disulfide barium titanate composite material nano roll prepared in the step (3) to obtain the photoelectric detector.
2. The method for preparing a molybdenum disulfide barium titanate composite nano-coil photoelectric detector according to claim 1, wherein the step (3) is specifically as follows:
and (3) dripping a sodium bicarbonate solution on the surface of the barium molybdenum disulfide titanate composite material prepared in the step (2), heating, washing with deionized water, and drying with nitrogen to obtain the barium molybdenum disulfide titanate composite material nano coil.
3. The method for preparing the molybdenum disulfide barium titanate composite nano-volume photodetector as claimed in claim 2, wherein the concentration of the sodium bicarbonate solution is 0.2-1M, the heating temperature is 30-70 ℃, and the heating time is 5s to 90 s.
4. The method for preparing a molybdenum disulfide barium titanate composite nano-coil photodetector according to claim 2, wherein the step (4) is specifically:
fumigating the metal electrode with hexamethyldisilazane, spin-coating polymethyl methacrylate solution on the metal electrode,
and (3) enabling the metal electrode to fall off by using polydimethylsiloxane and transferring the metal electrode to the nano coil to obtain the molybdenum disulfide barium titanate composite nano coil photoelectric detector.
5. The method for preparing a molybdenum disulfide barium titanate composite nano-volume photodetector according to claim 2, wherein the step (2) is specifically:
barium titanate nano-particles with the particle size of 100nm are placed in isopropanol solution for ultrasonic treatment until the barium titanate nano-particles are uniformly dispersed, the concentration of the dispersion liquid is 0.1M,
spin coating the dispersion on a two-dimensional molybdenum disulfide film at a spin coating speed of 500r min -1 The spin coating time is 10s, and the rotating speed is increased to 5000 r.min -1 And spin-coating for 60s, and drying to obtain the molybdenum disulfide barium titanate composite material.
6. The method for preparing the molybdenum disulfide barium titanate composite nano-roll photoelectric detector as claimed in claim 2, wherein in the step (1), the single-layer molybdenum disulfide thin film is prepared by a method comprising the following steps: and growing a two-dimensional molybdenum disulfide film on the silicon dioxide substrate by using a chemical vapor deposition method to prepare the monolayer molybdenum disulfide film.
7. The method for preparing the molybdenum disulfide barium titanate composite nano-roll photoelectric detector as claimed in claim 6, wherein the specific process for growing the two-dimensional molybdenum disulfide thin film on the silicon dioxide substrate by using the chemical vapor deposition method is as follows: 5mg of molybdenum trioxide powder is placed at the downstream of a quartz tube of the tube furnace, 500mg of sulfur powder is placed at the upstream of the quartz tube of the tube furnace, and the temperature is 50 ℃ min -1 The temperature rise rate of (2) increases the temperature of the molybdenum trioxide to 900 ℃ and maintains the temperature for 2min, and when the temperature rises to 600 ℃, the temperature is increased to 30 ℃ per min -1 Heating the sulfur powder to 180 ℃, introducing 80sccm argon gas as a carrier gas in the reaction process, and naturally cooling the tubular heating furnace to room temperature after the reaction is finished.
8. The molybdenum disulfide barium titanate composite nano-roll photoelectric detector prepared by the method for preparing the molybdenum disulfide barium titanate composite nano-roll photoelectric detector as claimed in any one of claims 1 to 7.
9. The utility model provides a molybdenum disulfide barium titanate combined material nanometer rolls up photoelectric detector which characterized in that, includes the insulating medium layer that stacks gradually from bottom to top, and layer is rolled up to molybdenum disulfide barium titanate combined material nanometer to and set up at an interval each other metal electrode on layer is rolled up to molybdenum disulfide barium titanate combined material nanometer.
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