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A method for testing the bending stiffness of two-dimensional nanomaterials and the interfacial adhesion energy between them and the substrate

A technology of two-dimensional nanomaterials and testing methods, which is applied in the field of material testing, can solve the problems of long pressurization time of gas, and achieve the effects of low cost, simple preparation process and fast testing

Active Publication Date: 2022-06-17
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the atomic-level thickness of two-dimensional nanomaterials, it faces the technical problem of sample clamping, and the measurement of its mechanical parameters is more challenging than traditional experimental mechanics.
However, the micropore bubbling method is used to measure the bending stiffness, and the reactive ion beam etching technique (RIE) must be used to etch SiO in advance. 2 Substrate; and the gas pressurization time is longer during the bubbling process (up to 5-7 days)

Method used

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  • A method for testing the bending stiffness of two-dimensional nanomaterials and the interfacial adhesion energy between them and the substrate
  • A method for testing the bending stiffness of two-dimensional nanomaterials and the interfacial adhesion energy between them and the substrate
  • A method for testing the bending stiffness of two-dimensional nanomaterials and the interfacial adhesion energy between them and the substrate

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Embodiment 1

[0086] A method for testing the bending stiffness and interfacial adhesion energy of two-dimensional nanomaterials specifically includes the following steps:

[0087] (1) Multilayer graphene (Taizhou Juna New Energy Co., Ltd., purity >99%) was subjected to a micromechanical exfoliation method (“Electric field effect in atomically thin carbon films.”, Novoselov, K. et al., Science, 2004, 306 (5696): p.666-669.) was adhered to a silicon wafer (Hangzhou Jingbo Technology Co., Ltd., N100) with a 300-nm silicon dioxide coating on the surface, and a liquid-assisted wet transfer technique was used to transfer multilayer graphene to Hexagonal boron nitride substrate (Shanghai Angwei Technology Co., Ltd., purity > 99%) to obtain nano-vacuoles;

[0088] (2) According to the shape function shown in formula I, the nanovacuole obtained in step (1) is subjected to morphological analysis by atomic force microscope, Origin and MATLAB, and the undetermined parameter values ​​in the shape funct...

Embodiment 2

[0107] A method for testing the bending stiffness and interfacial adhesion energy of two-dimensional nanomaterials specifically includes the following steps:

[0108] (1) Molybdenum disulfide with a thickness of 0.5 to 2 mm and a sheet diameter of 0.5 to 2 cm (Shanghai Angwei Technology Co., Ltd., purity > 99%) was adhered to the surface with a 300 nm silicon dioxide coating by the micromechanical peeling method On the silicon wafer (Hangzhou Jingbo Technology Co., Ltd., N100), liquid-assisted wet transfer technology was used to transfer molybdenum disulfide onto a silicon wafer (Hangzhou Jingbo Technology Co., Ltd., N100) provided with a 300-nm silicon dioxide coating to obtain nanometer vacuoles;

[0109] (2) According to the shape function shown in formula I, the nanovacuole obtained in step (1) is subjected to morphological analysis by atomic force microscope and Origin, and the undetermined parameter values ​​in the shape function are obtained;

[0110]

[0111] In fo...

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Abstract

The invention provides a method for testing the bending stiffness of a two-dimensional nanomaterial and the interfacial adhesion energy between it and a substrate, comprising: adhering the two-dimensional nanomaterial to the surface of a first substrate, transferring the two-dimensional nanomaterial to a second the surface of the substrate to obtain nano-vacuoles; perform morphological analysis on the nano-vacuole according to the shape function to obtain the undetermined parameter value in the shape function; according to the undetermined parameter value in the shape function, combine the mechanical model for the nano-vacuole analysis, to obtain the bending stiffness of the two-dimensional nanomaterial; to analyze in combination with the interface adhesion energy model, to obtain the interface adhesion energy between the two-dimensional nanomaterial and the substrate. The sample preparation process of the test method is simple, the test speed is fast, and it has strong applicability to different materials. It provides a new method for the measurement of the bending stiffness of two-dimensional nanomaterials and the interfacial adhesion energy between them and the substrate. The research system of mechanics of materials.

Description

technical field [0001] The invention belongs to the technical field of material detection, and in particular relates to a method for testing the bending stiffness of two-dimensional nanomaterials and the interface adhesion energy between them and a substrate. Background technique [0002] Two-dimensional (2D) nanomaterials are widely used in fields such as field-effect transistors, ultrathin photodetectors, transparent conductive films, and nanocomposites due to their excellent electrical, optical, mechanical, and chemical properties. Furthermore, the stacking of different 2D nanomaterials to form heterojunctions exhibits novel physical phenomena. For example, graphene devices on hexagonal boron nitride substrates have higher mobilities and charge carriers than those on silicon dioxide due to the atomically smooth surface of boron nitride without dangling bonds and charge traps inhomogeneity. The graphene boron nitride heterojunction also has a moiré superlattice structure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01Q60/24
CPCG01Q60/24
Inventor 王文祥马小杰刘璐琪张忠魏悦广
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA