Preparation method of antimonene nanosheets

A technology of nanosheets and antimonene, which is applied in the coupling of optical waveguides, the manufacture of microstructure devices, and the process for producing decorative surface effects. It can solve the problems of expensive equipment, irregular shapes of nanosheets, and insufficient purity of nanosheets. Advanced problems, to achieve the effect of good thickness uniformity, simple operation and good quality

Active Publication Date: 2020-06-19
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Document 2 uses molecular beam epitaxy to prepare antimonene nanosheets, but only a small area size can be obtained, and the equipment for this preparation method is expensive, which is not conducive to large-scale large-area preparation (Xu Wu, et al, Adv.Mater. 2017, 29, 1605407)
Document 3 adopts liquid-phase ultrasonic stripping method to prepare antimonene nanosheets, but the purity of the obtained nanosheets is not high and contains a large amount of oxygen. At the same time, the nanosheets do not have a regular shape, and it is difficult to control the uniformity of the nanosheets (Xin Wang, et al. al, Angew. Chem. Int. Ed. 2018, 57, 8668-8673.)

Method used

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  • Preparation method of antimonene nanosheets
  • Preparation method of antimonene nanosheets
  • Preparation method of antimonene nanosheets

Examples

Experimental program
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Embodiment 1

[0039] Step 1. Cut the pure copper foil (purity of 99.999%) into 1cm×1cm size, and place it on the quartz inside the CVD tube furnace;

[0040] Step 2. Filling the CVD tube furnace with Ar gas, then vacuuming with a mechanical pump, repeating 3 times to remove residual oxygen in the quartz tube, etc.;

[0041] Step 3. Set the heating and heating curve, raise the temperature to 1035°C in 52 minutes, and heat and anneal at 1035°C for 60 minutes;

[0042] Step 4. Turn on CVD heating mode and adjust Ar:H 2 The flow ratio is 95:5 (unit: Sccm), and the flow ratio is maintained until the end of annealing;

[0043] Step 5. Weigh 30 mg of pure antimony powder in the glove box, put it into the front end of the CVD tube furnace as the precursor, and place the annealed 1cm×1cm pure copper foil on the end of the quartz tube as a deposition substrate;

[0044] Step 6. Repeat step 2 to vacuum the quartz tube 3 times;

[0045] Step 7. Set the heating curve, raise the temperature to 660°C ...

Embodiment 2

[0050] Similar to Example 1, the difference lies in that the holding time for epitaxial growth in step 7 of Example 1 is regulated to be 5 min.

[0051] The SEM images of the triangular or trapezoidal nanosheets prepared in this example are as follows: Figure 4 As can be seen from the figure, the size of the nanosheets is 90 nm to 110 nm in length, the average thickness is about 13 to 16 nm, and the size of the nanosheets is uniform. Raman diagram of antimonene nanosheets Figure 19shown, as can be seen from the picture, at 115cm -1 and 155cm -1 There is a characteristic peak E of few-layer antimonene at g and A 1g , compared to the Raman characteristic peak of bulk antimonene at 110 cm -1 and 150cm -1 , there is obvious blue-shift phenomenon, indicating that the prepared triangular or trapezoidal nanosheets are antimonene substances, with good crystallinity and relatively thin thickness.

Embodiment 3

[0053] Similar to Example 1, the difference lies in that the holding time for epitaxial growth in step 7 of Example 1 is regulated to be 7 min.

[0054] The SEM image of the nanosheets prepared in this example is as follows Figure 5 As can be seen from the figure, the size of the nanosheets is 90-120 nm in length, the average thickness is about 20-25 nm, and the size of the nanosheets is uniform.

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Abstract

The invention discloses a preparation method of an antimonene nanosheet. The method comprises the steps of taking pure antimony powder as a precursor and a polycrystalline copper foil sheet as a substrate; under a normal pressure, setting a gas atmosphere flow ratio to be Ar : H2=100-300 : 10-50 sccm; carrying out physical vapor deposition at a temperature of 640-690 DEG C for 3-19 minutes; enabling the temperature of the substrate to be 150-250 DEG C; and obtaining the triangular or trapezoidal antimonene nanosheet which grows on the polycrystalline copper foil sheet. The method disclosed bythe invention is simple to operate and is carried out under the normal pressure; and the prepared triangular or trapezoidal antimonene nanosheet is high in nucleation density, high in purity and stable in chemical property is stable, the length is 25 nm to 10 microns, and the thickness can be controlled to be 2 nm to 110 nm.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, and relates to a preparation method of antimonene nanosheets. Background technique [0002] Two-dimensional nanosheets have a wide range of applications in materials science, energy, solar cells, and optoelectronic devices due to their unique high carrier mobility, excellent optical, electrical, and mechanical properties. Antimonene nanosheets are predicted to have a band gap of 2.28 eV, which is in the blue light emission spectral range, and has great potential for application in metal-oxide-semiconductor field-effect transistors, especially optoelectronic devices. In addition to the wide bandgap, the monolayer is considered a topological insulator with potential future applications in efficient quantum transport and topological quantum computing. [0003] At present, antimonene nanosheets are mainly prepared by mechanical exfoliation, liquid phase exfoliation, molecular beam e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81B7/04B81C1/00
CPCB81B7/04B81C1/00031
Inventor 熊云海邹友生牛天超宋秀峰曾海波
Owner NANJING UNIV OF SCI & TECH
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