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A Method for Inducing Super Graphene Network Structure Using Femtosecond Pulsed Laser

A technology of laser induction and network structure, applied in the direction of graphene, chemical instruments and methods, nano-carbon, etc., can solve problems such as complex processes, and achieve the effect of simple process and good joint quality

Active Publication Date: 2020-02-07
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scanning speed of the laser and the energy control of the laser are the key to inducing the interconnection of MWCNTs into a super graphene network structure. The traditional interconnection process usually requires precise positioning and the process is complicated.

Method used

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  • A Method for Inducing Super Graphene Network Structure Using Femtosecond Pulsed Laser
  • A Method for Inducing Super Graphene Network Structure Using Femtosecond Pulsed Laser
  • A Method for Inducing Super Graphene Network Structure Using Femtosecond Pulsed Laser

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Effect test

Embodiment 1

[0017] Embodiment 1, a kind of method utilizing femtosecond pulsed laser to induce super graphene network structure comprises the following steps:

[0018] 1) Non-covalently modified MWCNTs: prepare 50 mL of 1% sodium dodecyl sulfate SDS aqueous solution in a beaker, weigh 100 mg MWCNTs and transfer them to the sodium dodecyl sulfate SDS aqueous solution, and first use a tank-type ultrasonic cleaner to sonicate 20 minutes, and then use the angle ultrasonic machine to conduct ultrasound, the specific parameters of the angle type ultrasonic machine: power 60W, ultrasonic time 1 second, interval time 1 second, ultrasonic time 6 hours, to obtain non-covalently modified MWCNTs in the water environment;

[0019] 2) Construction of the inductive substrate: the non-covalently modified MWCNTs in the aqueous environment were deposited onto the silica SiO by a spin-coating process. 2 surface of the substrate, and then move the spin-coated substrate to a heating station and heat it at 60°...

Embodiment 2

[0022] Embodiment 2: the embodiment 1 step 3) is adjusted to: the laser energy of 70mW is with the laser rate scanning induction substrate of 25mm / s, and other step order and parameter are constant, can obtain the smooth super graphene network structure of joint, refer to image 3 , the super graphene network structure is basically complete.

Embodiment 3

[0023] Embodiment 3: the embodiment 1 step 3) is adjusted to: the laser energy of 60mW is with the laser rate scanning induction substrate of 20mm / s, and other step order and parameter are constant, can obtain the smooth super graphene network structure of joint, refer to Figure 4 , the super graphene network structure is basically complete.

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Abstract

The invention provides a method for inducing a super-graphene network structure by utilizing femtosecond pulse laser. The method comprises the following steps: firstly, carrying out ultrasonic treatment on MWCNTs (Multi-walled Carbon Nanotubes) in a sodium dodecyl sulfate water solution to obtain non-covalent modified MWCNTs in a water environment; then coating the surface of a silicon dioxide substrate with the non-covalent modified MWCNTs by utilizing a spin-coating technology; then heating the substrate on a heating platform to remove surplus water molecules, so as to obtain an induced substrate; finally, carrying out laser radiation induction on the induced substrate. According to the method provided by the invention, accurate positioning is not needed, a technology is simple and the processing efficiency is high; the method can be used in a large scale and a connector of the obtained super-graphene network structure is smooth.

Description

technical field [0001] The invention relates to the technical field of super graphene structure, in particular to a method for inducing a super graphene network structure by using a femtosecond pulsed laser. Background technique [0002] At present, the manufacture of new structures (named super graphene) based on honeycomb symmetric carbon networks is an important method for carbon nanotube materials to achieve structuring, functionalization, and deviceization, and is of great importance to solve the practical application problems of carbon nanotubes. Therefore, it has become a research hotspot in nanofabrication technology. Using chemical vapor deposition, high-energy beam irradiation, ultrasonic vibration interconnection, brazing and other methods to interconnect multi-walled carbon nanotubes (MWCNTs), among which laser irradiation technology has the characteristics of simple operation, no need for precise positioning, and non-contact induction. It has been applied to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/168C01B32/184
CPCC01B32/168C01B32/184
Inventor 崔健磊梅欢欢梅雪松王文君王恪典刘斌段文强凡正杰
Owner XI AN JIAOTONG UNIV
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