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Adjustable and controllable two-dimensional thermal invisibility cloak based on multiple annular graphene layers

A multi-layer graphene, layer graphene technology, applied in clothing, clothing features, applications, etc., can solve problems such as inability to open, thermal stealth function does not have tunability, etc., to save energy, improve computer performance, and application potential big effect

Active Publication Date: 2017-07-18
DALIAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the shortcoming that the thermal stealth function of the existing two-dimensional thermal stealth cloak does not have tunability (that is, the thermal stealth function cannot be turned on / off), and to use graphene, a common material, to provide a The new technology to realize the adjustable (open / close) two-dimensional thermal invisibility cloak makes the system have the advantages of simple structure, fast speed, easy operation, low energy consumption, strong real-time performance and low implementation cost

Method used

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  • Adjustable and controllable two-dimensional thermal invisibility cloak based on multiple annular graphene layers
  • Adjustable and controllable two-dimensional thermal invisibility cloak based on multiple annular graphene layers
  • Adjustable and controllable two-dimensional thermal invisibility cloak based on multiple annular graphene layers

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Embodiment 1

[0027] First, through the material growth process and mask process, the designed two-dimensional graphene ring layer is prepared on the upper surface of the substrate 1, that is, the center of the x-y horizontal plane is taken as the axis from the inside to the outside in the direction of the x and y axes. To form an N layer (N ≥ 1) graphene ring layer, as shown in Figure 2(a).

[0028] Among them, the design of the graphene ring layer can use algorithms such as finite time domain difference method and finite element method.

[0029] The substrate is drilled with small holes 5 corresponding to each graphene ring layer. A wire 6 is installed in the small hole, one end of the wire is connected to the graphene ring layer 3, and the other end passes through the control unit 7 and the ground wire 9 of the energy supply unit 8. By manipulating the control unit 7, the energy supply unit 8 can be adjusted to each layer of graphene. The excitation time of the ring layer, and then cont...

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Abstract

The invention provides an adjustable and controllable two-dimensional thermal invisibility cloak based on multiple annular graphene layers. The adjustable and controllable two-dimensional thermal invisibility cloak is formed in the manner that with the center of the x-y horizontal plane as the axis, prolongation of annular graphene layers is conducted layer by layer in the x-axis direction and the y-axis direction. All the layers can correspond to different thermal conductivity coefficients through control over the Fermi level distribution of graphene in the different annular layers, and then two-dimensional thermal conductivity distribution needed by thermal invisibility is obtained; then, after thermal flow winds around the cloak area, a temperature field recovers original distribution, and therefore the thermal invisibility function is achieved; and an object at the center of the thermal invisibility cloak is sheltered from external thermal flow disturbance, and external thermal flow distribution is not influenced. The real-time switching on / off performance of the thermal invisibility cloak is achieved through circular control over the Fermi level distribution of the each annular graphene layer, and therefore the defect that the two-dimensional thermal invisibility cloak cannot be circularly switched on or off is overcome.

Description

technical field [0001] The invention relates to a method and device for realizing an adjustable two-dimensional thermal invisibility cloak based on multilayer graphene ring layers, which can be applied to the field of heat flow control. Background technique [0002] In 2006, Document 1: "J.B.Pendry et al, SCIENCE, 2006(312): 1780" proposed for the first time that the use of anisotropic media can manipulate the propagation direction of light waves and realize the concept of optical cloaking, which has attracted widespread attention and has become an important field in the field of optics. research hotspots. At the same time, as an expanded field of optical cloak application, that is to manipulate the direction of heat flow through artificial structures to achieve thermal cloaking has quickly become a hot issue in the field of thermodynamics. In 2013, document 2: "R. Schittny et al, Phys. Rev. Lett. 2013(110): 195901" used copper and polydimethylsiloxane to make a two-dimensi...

Claims

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Application Information

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IPC IPC(8): F41H3/02G02F1/29
CPCA41D2400/12F41H3/02G02F1/29
Inventor 曹暾
Owner DALIAN UNIV OF TECH
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