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A method for measuring the bonding force between multi-walled nanotubes

A technology of multi-walled nanotubes and cohesive force, applied in the field of measurement, can solve the problems of complex operation process, harsh conditions, low efficiency, etc., and achieve simple and convenient operation process, improved accuracy and precision, high accuracy and precision Effect

Active Publication Date: 2017-03-08
JIANGNAN UNIV
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Problems solved by technology

At present, domestic and foreign methods for measuring the bonding force between nanotubes require the use of a variety of high-precision measuring instruments. The conditions are harsh, the cost is high, but the efficiency is low and the operation process is extremely complicated.

Method used

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  • A method for measuring the bonding force between multi-walled nanotubes
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  • A method for measuring the bonding force between multi-walled nanotubes

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Embodiment Construction

[0033] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] Such as figure 1 Shown, the present invention comprises three steps:

[0035] Step 1: The geometry and spatial distribution of parallel and crossed two multi-walled nanotubes as figure 2 As shown in the figure, the axes of the multi-walled nanotubes CNT1 and CNT2 are parallel to each other, and the number of layers is m and n respectively. The radius of each layer on the two nanotubes is r 1i (1≤i≤m) and r 2j (1≤j≤n), such as image 3 shown. to rotate figure 2 At one end of the medium nanotube CNT2, when a certain point D on it moves to point E, the corresponding point B rotates to point C. The rotated nanotube is labeled CNT2', and its intersection angle with the CNT1 or CNT2 axis is β. In the cylindrical coordinate system (r, θ, z), the z axis is along the central axis of the nanotube CNT1. A vertical line perpendicular t...

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Abstract

The invention provides a method for testing binding power between multi-wall nanotubes in order to accurately test the binding power between the two multi-wall nanotubes when the nanotubes are located at the complex positions in space. The method includes the following steps that relative coordinates and absolute coordinates between corresponding points on the two multi-wall nanotubes in different coordinate systems are determined according to the geometric distribution condition of the two multi-wall nanotubes in space; the cohesive energy relational expression between the two multi-wall nanotubes can be calculated according to the Van Der Waals interaction between the two multi-wall nanotubes, and integration is conducted so that the total cohesive energy expression between the two multi-wall nanotubes can be obtained; derivation treatment is carried out on the total cohesive energy expression, so that the expression of the binding power between the two multi-wall nanotubes is obtained; the magnitude of the binding power between the two multi-wall nanotubes is calculated through a binding power formula by means of the given multi-wall nanotube radii and the perpendicular distance and the cross angle between the tubes. The method has the advantages that cost is low and the operation procedure is simple and convenient. Testing complexity is effectively lowered, and meanwhile high accuracy and precision are achieved. The method is suitable for application and popularization.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to the application of measurement technology in the nanoscale range, in particular to a method for measuring the bonding force between multi-walled nanotubes. Background technique [0002] Due to its unique structure and excellent performance, nanotubes are widely used in solar energy utilization, fuel cells, high-efficiency catalysts, field emission devices, and nanobiological systems, and have achieved very remarkable results. Recently, nanotubes have been assembled into integrated circuits for information storage, and their working principle and stability are mainly based on the bonding force between nanotubes. Accurately obtaining the cohesion between nanotubes is crucial. In addition, nanotubes have a large specific surface area and high surface energy, and are easily bonded to each other. This bonding phenomenon will affect the excellent performance of the nanotubes in a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
Inventor 赵军华董淑宏贲素东于培师
Owner JIANGNAN UNIV
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