Growth mechanism of 3D graphene-carbon nanotube hybrid structure

2018 ◽  
Vol 25 (2) ◽  
pp. 389-393
Author(s):  
Mohammadreza Saeidi
Keyword(s):  
Carbon Nanotube ◽  
Growth Mechanism ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Hybrid Structure ◽  
Optimum Temperature ◽  
3D Graphene ◽  
Longitudinal Phonon ◽  
Adsorbed Carbon ◽  
Phonon Oscillation

AbstractIn this paper, a novel molecular dynamic model is presented to describe the growth mechanism of three-dimensional (3D) graphene-carbon nanotube (G-CNT) hybrid structure synthesized by catalytic chemical vapor deposition. For this purpose, first, the physisorption of a carbon atom on a graphene sheet (GS) is studied. Then the model is formulated by using kinetic theory and the longitudinal phonon oscillation of adsorbed carbon atoms on GS. Results show that the CNT grows on GS up to 0.3 mm. Also, there is an optimum temperature for growth of the 3D G-CNT hybrid structure, which can be calculated by the presented model. Finally, it is shown that increase of partial pressure leads to increase of length of growing CNT on GS.

scholarly journals Nitrogen-Doped Flower-Like Hybrid Structure Based on Three-Dimensional Graphene

2020 ◽  
Vol 6 (2) ◽  
pp. 40
Author(s):  
Kinshuk Dasgupta ◽  
Mahnoosh Khosravifar ◽  
Shrilekha Sawant ◽  
Paa Kwasi Adusei ◽  
Sathya Narayan Kanakaraj ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Hybrid Structure ◽  
High Specific Surface Area ◽  
Active Nitrogen ◽  
3D Graphene ◽  
Nitrogen Doped ◽  
N Doping

A new flower-like hybrid structure consisting of nitrogen-doped 3-dimensional (3D) graphene and vertically aligned graphene has been synthesized using a combination of low-pressure chemical vapor deposition (LPCVD) and plasma-enhanced chemical vapor deposition (PECVD) techniques. Active nitrogen (N) species were found to be essential for the growth of the flower-like morphology. N-doping was responsible for enhanced electrical conductivity and wettability of the obtained nano-carbon hybrid structure. Based on the conducted studies a growth mechanism has been proposed. The high specific surface area, low resistance to charge transfer and enhanced specific capacitance of this nitrogen-doped hybrid structure, makes it an excellent candidate material for supercapacitors.

Compressive Mechanical Properties of Carbon Nanotube Sponges: Experiments and Modeling

2012 ◽  
Vol 528 ◽  
pp. 14-17
Author(s):  
Peng Zhan Sun ◽  
Hong Wei Zhu
Keyword(s):  
Mechanical Properties ◽  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Theoretical Model ◽  
Vapor Deposition ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Environmental Applications ◽  
Deep Insight ◽  
Simple Theoretical Model

Carbon nanotube (CNT) sponges are three-dimensional frameworks of interconnected CNTs with great potentials in composite and environmental applications. CNT sponges with lateral sizes of centimeters have been prepared through chemical vapor deposition (CVD), and their compressive mechanical properties are studied. To gain deep insight on the microstructure and how CNTs are connected within the sponges, we propose a simple theoretical model to understand the arrangement as well as the interconnection of CNTs. The mechanical properties of CNT sponges can be well explained and predicted using this model.

Base-growth mechanism of double-walled carbon nanotube in chemical vapor deposition

2013 ◽  
Vol 371 ◽  
pp. 56-59 ◽  
Author(s):  
Hossein Shahrokhabadi ◽  
Mohammadreza Saeidi ◽  
Majid Vaezzadeh ◽  
Hamid Shahivandi ◽  
Mehrdad Salehian
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Growth Mechanism ◽  
Vapor Deposition ◽  
Chemical Vapor

scholarly journals Fabrication of 3D monolithic graphene foam/polycaprolactone porous nanocomposites for bioapplications

2020 ◽  
Vol 56 (9) ◽  
pp. 5581-5594
Author(s):  
Neda Bahremandi Tolou ◽  
Hamidreza Salimijazi ◽  
Theodoros Dikonimos ◽  
Giuliana Faggio ◽  
Giacomo Messina ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Porous Polymer ◽  
Nerve Tissue ◽  
Inductive Heating ◽  
Chemical Vapor Deposition Growth ◽  
Graphene Foam ◽  
3D Graphene ◽  
Process Architecture

Abstract Aiming at the production of light, porous, conductive, biosafe composites, in this paper we are presenting a novel fabrication method for monolithic, three-dimensional (3D) graphene foam (GF)/porous polymer composites. The synthesis adopts a novel process architecture by using Ni foam templates in an inductive heating chemical vapor deposition growth process, and by removing Ni chemically while retaining graphene integrity by the reversible application of cyclododecane (CD); finally, nondestructive coating procedures with polycaprolactone (PCL) solutions have been developed. The composites can be optimized to enhance electrical conduction, flexibility and mechanical properties, while mixing PCL and CD allows to coat the GF with a novel mesoporous polymer coating. By tuning the GF properties, the typical electrical resistance of the 3D forms can be reduced to a few 10 s of Ohms, values that are maintained after the PCL coatings. The current study achieved a GF fraction ranging between 1 and 7.3 wt%, with even the lower graphene content composites showing acceptable electrical and mechanical properties. The properties of these conductive 3D-GF/PCL composites are in line with the requirements for applications in the field of nerve tissue engineering. Graphical abstract

Growth mechanism of carbon nanotube forests by chemical vapor deposition

2002 ◽  
Vol 80 (15) ◽  
pp. 2752-2754 ◽  
Author(s):  
Oleg A. Louchev ◽  
Yoichiro Sato ◽  
Hisao Kanda
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Growth Mechanism ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Carbon Nanotube Forests

scholarly journals Electroadsorption Desalination with Carbon Nanotube/PAN-Based Carbon Fiber Felt Composites as Electrodes

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Yang Liu ◽  
Junbo Zhou
Keyword(s):  
Carbon Nanotube ◽  
Carbon Fiber ◽  
Electrode Materials ◽  
Three Dimensional ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Composite Electrodes ◽  
Voltage Change ◽  
Carbon Fiber Felt ◽  
Reactive Groups

The chemical vapor deposition method is used to prepare CNT (carbon nanotube)/PCF (PAN-based carbon fiber felt) composite electrodes in this paper, with the surface morphology of CNT/PCF composites and electroadsorption desalination performance being studied. Results show such electrode materials with three-dimensional network nanostructures having a larger specific surface area and narrower micropore distribution, with a huge number of reactive groups covering the surface. Compared with PCF electrodes, CNT/PCF can allow for a higher adsorption and desorption rate but lower energy consumption; meanwhile, under the condition of the same voltage change, the CNT/PCF electrodes are provided with a better desalination effect. The study also found that the higher the original concentration of the solution, the greater the adsorption capacity and the lower the adsorption rate. At the same time, the higher the solution’s pH, the better the desalting; the smaller the ions’ radius, the greater the amount of adsorption.

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