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Method for preparing single-layer MoS2/WS2 two-component gradient material by one-step method

A gradient material, two-component technology, applied in chemical instruments and methods, sustainable manufacturing/processing, metal material coating technology, etc., can solve the problems of poor size controllability, scarcity, complex preparation process, etc. The effect of domain growth

Pending Publication Date: 2022-08-05
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Comparative studies on 2D chalcogenide horizontal heterojunctions with different sizes are relatively rare, mainly because the preparation process of 2D chalcogenide horizontal heterojunctions is more complicated and the size controllability is poor.

Method used

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  • Method for preparing single-layer MoS2/WS2 two-component gradient material by one-step method
  • Method for preparing single-layer MoS2/WS2 two-component gradient material by one-step method
  • Method for preparing single-layer MoS2/WS2 two-component gradient material by one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] One-step preparation of monolayer MoS 2 / WS 2 A method for a two-component gradient material, comprising the following steps:

[0046] 1. Ultrasonic cleaning of SiO with acetone and ethanol 2 / Si substrate, and with N 2 blow dry;

[0047] 2. Use argon to clean the quartz tube and corundum boat of the multi-temperature zone tube furnace;

[0048] 3. Place the weighed 1.0g of sulfur powder on one side of a corundum boat with a length of 5cm, and compress the sulfur powder with a spatula. Seal the corundum boat containing the sulfur powder with aluminum foil, and use a thin steel needle in the container. Two small holes with a diameter of 0.5mm are made on the side where the sulfur powder is placed, and then the corundum boat containing the sulfur powder is placed in the low temperature area upstream of the multi-temperature zone tube furnace; 0.5g tungsten oxide and 1mg sodium chloride are mixed. The mixed powder and 0.2 g of molybdenum oxide powder were sequentially...

Embodiment 2

[0053] One-step preparation of monolayer MoS 2 / WS 2 A method for a two-component gradient material, comprising the following steps:

[0054] 1. Ultrasonic cleaning of SiO with acetone and ethanol 2 / Si substrate, and with N 2 blow dry;

[0055] 2. Use argon to clean the quartz tube and corundum boat of the multi-temperature zone tube furnace;

[0056] 3. Place the weighed 2.0g sulfur powder on one side of a corundum boat with a length of 4cm, and compress the sulfur powder with a spatula. Seal and wrap the corundum boat containing the sulfur powder with aluminum foil, and use a thin steel needle in the container. Three small holes with a diameter of 0.5mm are made on the side where the sulfur powder is placed, and then the corundum boat containing the sulfur powder is placed in the low temperature zone upstream of the multi-temperature zone tube furnace; 0.8g of tungsten oxide and 0.1mg of sodium chloride are mixed The mixed powder and 0.35g of molybdenum oxide powder we...

Embodiment 3

[0061] One-step preparation of monolayer MoS 2 / WS 2 A method for a two-component gradient material, comprising the following steps:

[0062] 1. Ultrasonic cleaning of SiO with acetone and ethanol 2 / Si substrate, and with N 2 blow dry;

[0063] 2. Use argon to clean the quartz tube and corundum boat of the multi-temperature zone tube furnace;

[0064] 3. Place the weighed 1.8g of sulfur powder on one side of a corundum boat with a length of 6cm, and compress the sulfur powder with a spatula. Seal the corundum boat containing the sulfur powder with aluminum foil, and use a thin steel needle in the container. Three small holes with a diameter of 0.5mm are made on the side where the sulfur powder is placed, and then the corundum boat containing the sulfur powder is placed in the low temperature area upstream of the multi-temperature zone tube furnace; 1.3g of tungsten oxide and 0.06mg of chlorinated The mixed powder of sodium and 0.5 g of molybdenum oxide powder were sequen...

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Abstract

The invention relates to a method for preparing a single-layer MoS2 / WS2 two-component gradient material by a one-step method, which belongs to the field of inorganic nano semiconductor materials, and comprises the following steps of: compacting powdered sulfur on one side of a corundum boat by using a medicine spoon, sealing and wrapping the corundum boat containing the powdered sulfur by using aluminum-foil paper, pricking a small hole in the side containing the powdered sulfur by using a fine steel needle, and sealing the corundum boat by using a sealing strip; then placing a corundum boat containing powdered sulfur in an upstream low-temperature area of the multi-temperature-area tubular furnace; sequentially and separately placing a mixture of tungsten oxide powder and NaCl and molybdenum oxide powder at the upstream of a long corundum boat, placing a substrate at the downstream of the long corundum boat, and then placing the long corundum boat in a downstream high-temperature area of a multi-temperature-area tubular furnace; the single-layer MoS2 / WS2 two-component gradient materials with different sizes are prepared along with the adjustment of the temperature of the downstream high-temperature area of the multi-temperature-area tubular furnace and the adjustment of the use amount of NaCl. The single-layer MoS2 / WS2 two-component gradient material with the controllable size can be prepared, and the prepared sample is good in crystallinity, stable in chemical and thermodynamic properties and good in application prospect.

Description

technical field [0001] The present invention relates to one-step preparation of monolayer MoS 2 / WS 2 The method for a two-component gradient material belongs to the field of inorganic nano-semiconductor materials. Background technique [0002] Chemical vapor deposition has unique advantages in the field of two-dimensional material preparation, and the prepared samples have high purity and good crystallinity. A variety of two-dimensional materials have been prepared by this method, which greatly enriches the family of two-dimensional materials. Two-dimensional chalcogenides are a common class of two-dimensional materials that can be prepared by chemical vapor deposition, and researchers have a certain understanding of their structures and properties. Not only single 2D chalcogenides, but also heterojunctions of 2D chalcogenides are frequently reported. Based on the maturity of the single chalcogenide preparation process, the researchers have carried out a detailed study ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L21/02C01B17/00C01G39/06C01G41/00C23C16/30
CPCH01L21/02568H01L21/0262C01G39/06C01G41/00C01B17/00C23C16/305Y02P70/50
Inventor 聂安民康梦克向建勇翟昆牟从普薛天宇温福昇王博翀柳忠元田永君
Owner YANSHAN UNIV
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