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Method for transferring single graphene layer based on degradable polymer

A technology for degrading polymers and single-layer graphene, applied in the direction of single-layer graphene, graphene, nano-carbon, etc., can solve problems such as polymer residues, and achieve easy film formation, good film formation effect, and biocompatibility good effect

Pending Publication Date: 2018-08-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymethyl methacrylate can improve the removal of polymethyl methacrylate residues to a certain extent through annealing treatment and ultraviolet exposure, but the problem of polymer residues still needs to be further solved [JiWon Suk.et al.Enhancement of the electrical properties of graphene grown by chemical vapor deposition via controlling the effects of polymer residue. Nanoletters. 13(2013), 1462-1467]

Method used

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  • Method for transferring single graphene layer based on degradable polymer
  • Method for transferring single graphene layer based on degradable polymer
  • Method for transferring single graphene layer based on degradable polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The preparation concentration is the polylactic acid solution of 20wt%, and preparation method is that polylactic acid is dissolved in the dichloromethane. The silicon wafer of the target substrate needs to be deoxidized before use, ultrasonically in acetone, ethanol, and water for about 30 minutes, and then in hydrofluoric acid solution (HF:H 2 O volume ratio is 1:50) in soaking 2.5min.

[0027] (2) Cut the graphene / copper sheet of suitable size and fix it on the glass slide with adhesive tape to prevent the graphene / copper sheet from curling. Place the glass slide loaded with the graphene / copper sheet on the spin coating apparatus, set the spin coating speed to 4000rpm, and the spin coating time to 40s. After the spin coating was finished, the slide glass was taken out and dried in a natural state for 15 minutes. Polylactic acid formed a film on the surface of graphene naturally, and the thickness of the polylactic acid film was 0.3 μm.

[0028] (3) The graphene...

Embodiment 2

[0034](1) preparation concentration is the polylactic acid solution of 10wt%, and preparation method is that polylactic acid is dissolved in methylene chloride. The silicon dioxide on the target substrate needs to be deoxidized before use. It is ultrasonicated in acetone, ethanol, and water for about 60 minutes, and then in hydrofluoric acid solution (HF:H 2 O volume ratio is 1:50) in soaking 5min.

[0035] (2) Cut the graphene / copper sheet of suitable size and fix it on the glass slide with adhesive tape to prevent the graphene / copper sheet from curling. Place the glass slide loaded with the graphene / copper sheet on the spin coating apparatus, set the spin coating speed to 3000rpm, and the spin coating time to 50s. After the spin coating was finished, the lower glass slide was taken out and dried in a natural state for 30 minutes. Polylactic acid formed a film on the surface of graphene naturally, and the thickness of the polylactic acid film was 0.1 μm.

[0036] (3) The gr...

Embodiment 3

[0042] (1) preparation concentration is the polylactic acid solution of 30wt%, and preparation method is that polylactic acid is dissolved in methylene chloride. The silicon carbide of the target substrate needs to be deoxidized before use, ultrasonically in acetone, ethanol, and water for about 10 minutes, and then in hydrofluoric acid solution (HF:H 2 O volume ratio is 1:50) in soaking 1min.

[0043] (2) Cut the graphene / copper sheet of suitable size and fix it on the glass slide with adhesive tape to prevent the graphene / copper sheet from curling. Place the glass slide loaded with graphene / copper sheet on the spin coating apparatus, set the spin coating speed to 3500rpm, and spin coating time to 30s. After the spin coating was completed, the slide glass was taken out and dried in a natural state for 1 min. Polylactic acid naturally formed a film on the graphene surface, and the thickness of the polymer film was 0.5 μm.

[0044] (3) The graphene / copper sheet covered with p...

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Abstract

The invention discloses a method for transferring a single graphene layer based on a degradable polymer. The method comprises the following steps of using the degradable polymer as an auxiliary material for graphene transfer; transferring the graphene from a lining substrate to a target substrate. The degradable polymer can be easily removed, can be dissolved into a solvent, and can also be degraded in hot water. The single graphene layer with fewer surface residues, good single-layer structure and high biological compatibility can be obtained by the method, and be attached to the substrate. The transfer method has the advantages that the transfer method is simple, the operation is easy, and the transferred graphene / substrate material can be widely applied into the fields of biological sensors, tissue engineering and the like.

Description

technical field [0001] The invention relates to the field of graphene transfer, in particular to a method for transferring single-layer graphene based on a degradable polymer that is simple, easy to operate, environmentally friendly and has good biocompatibility. Background technique [0002] Graphene is a two-dimensional material with a thickness of one atom. Its crystal is a single lattice with a hexagonal honeycomb structure. It has good physical, mechanical and electronic properties, high carrier mobility, superelastic mechanical properties, and high transparency. Optical properties such as superconductivity. The chemical vapor deposition method can prepare large-area graphene, and the growth of graphene on a substrate (such as a copper sheet with good ductility). However, in order to fabricate graphene devices such as graphene field-effect transistors, high-quality 2D graphene needs to be transferred to ideal substrates (such as silicon or silicon dioxide) [Keun Soo Ki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B2204/02
Inventor 程逵龙小军翁文剑
Owner ZHEJIANG UNIV
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