Wrinkled graphene lamella and making method thereof

A graphene sheet and wrinkle technology, which is applied in the field of graphene sheet and its preparation, can solve the problems that graphene sheets cannot generate wrinkles, etc., and achieve the effect of simple operation and easy control of operating conditions

Active Publication Date: 2014-11-12
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that the prior art cannot generate wrinkles in the middle of the graphene sheet, a method for generating wrinkles on the graphene sheet is proposed, which can control the location of the wrinkles on the graphene sheet, both in Wrinkles can be generated at the edge of the graphene sheet, or anywhere in the middle of the graphene sheet

Method used

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  • Wrinkled graphene lamella and making method thereof

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Embodiment 1

[0048] A method of generating wrinkles on a graphene sheet, said method comprising the steps of:

[0049] (1) After washing the silicon wafer with acetone and absolute ethanol, dry it with nitrogen for later use;

[0050] The weight average molecular weight is 100×10 3 Polystyrene is heated and dissolved in chlorobenzene to prepare a polystyrene solution with a mass concentration of 5%;

[0051] The polystyrene solution was spin-coated on the silicon wafer, and dried at 180°C to obtain a polystyrene layer with a thickness of 230nm;

[0052] (2) exfoliating the graphene onto the polystyrene-layered silicon wafer obtained in step (1) using a micromechanical force exfoliation method;

[0053] (3) Place the silicon wafer loaded with graphene sheets under the laser optical system (Renishaw inVia laser Raman spectrometer) with an optical microscope, find the position of the graphene sheets through the optical microscope, and then use the wavelength of 514nm laser irradiates the g...

Embodiment 2

[0057] The difference with embodiment 1 is:

[0058] The weight-average molecular weight of polystyrene used in step (1) is 600×10 3 , the mass concentration of the prepared polystyrene solution is 3%; the thickness of the polystyrene layer is 150nm;

[0059] The wavelength of the laser used in step (3) is 633nm, the laser power is 10mW, and the laser irradiation time is 20s.

Embodiment 3

[0061] The difference with embodiment 1 is:

[0062] The weight-average molecular weight of polystyrene used in step (1) is 900×10 3 , the mass concentration of the prepared polystyrene solution is 8%; the thickness of the polystyrene layer is 460nm;

[0063] The wavelength of the laser used in step (3) is 785nm, the laser power is 15mW, and the irradiation time is 90s.

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Abstract

The invention relates to a wrinkled graphene lamella and a making method thereof, and belongs to the graphene preparation field. The method is characterized in that laser irradiates a graphene lamella covering a polystyrene layer to obtain wrinkles. The method generating wrinkles on the graphene lamella can control the generation positions of the wrinkles, can generate wrinkles at the edges of the graphene lamella, and can also generate wrinkles in the middle position of the graphene lamella; and the method has the advantages of simple operation, and easy control of operation conditions.

Description

technical field [0001] The invention relates to the field of graphene preparation, in particular to a wrinkled graphene sheet and a preparation method thereof. The preparation method of the wrinkled graphene sheet can control the growth position of wrinkles in the graphene sheet. Background technique [0002] Graphene has a two-dimensional lattice structure, and the carbon atoms in the plane are sp 2 The hybridized orbitals are connected to form a hexagonal lattice structure, that is, the carbon atoms are connected to the adjacent three carbon atoms through strong σ bonds, and the C-C bonds make graphene have good structural rigidity, and the remaining p electron orbital is vertical On the graphene plane, it forms π bonds with the surrounding carbon atoms, and the delocalization of π electrons in the lattice makes graphene have good conductivity. The electron mobility on the plane at room temperature is 1.5×10 4 cm 2 / V s, far exceeds the conduction rate of electrons in ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 方英李忠军李强程增光
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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