Gravity-Assisted Chemical Vapor Deposition of Vertically Aligned Single-Walled Carbon Nanotubes

2007 ◽  
Vol 154 (7) ◽  
pp. K15
Author(s):  
C. M. Yeh ◽  
M. Y. Chen ◽  
J.-Y. Gan ◽  
J. Hwang ◽  
C. D. Lin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Process Design for the Flow of Ethanol Chemical Vapor Deposition Grown Vertically Aligned Single Walled Carbon Nanotubes

2012 ◽  
Author(s):  
Hatem Abuhimd ◽  
Abe Zeid ◽  
Yung Joon Jung ◽  
Sagar Kamarthi
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Flow Rate ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotubes ◽  
Growth Time ◽  
Single Walled Carbon ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Carbon nanotubes (CNTs) have received much attention from both the scientific and industrial communities due to their structural properties and unique morphology. There has also been growing interest in vertically aligned single walled carbon nanotubes (VA-SWNTs) because of their suitability for building devices such as solar cells and nanomembrane. Various methods including chemical vapor deposition (CVD) have been developed for growing VA-SWNTs. Among them is alcohol catalytic CVD which is well known for its economic viability, comprehensive substrates selectivity and good yield of VA-SWNTs. This work studies the length assurance of VA-SWNTs growth by an experimental design and an artificial neural network (ANN) metamodel. Process analysis shows that the interaction between gas flow rate and growth time are the most significant input factors. In addition, with high probability flow rate less than 150 sccm and a growth time of 20 minutes are suitable for the repeatability of medium length VA-SWNTs.

Process Design for the Controlability of Chemical Vapor Deposition Grown Vertically Aligned Single Walled Carbon Nanotubes

2011 ◽  
Author(s):  
Hatem Abuhimd ◽  
Abe Zeid ◽  
Yung Joon Jung ◽  
Sagar Kamarthi
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Process Model ◽  
Chemical Vapor ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Vertically Aligned ◽  
Temperature And Pressure ◽  
Walled Carbon Nanotubes

Carbon nanotubes (CNTs) have received much attention from both the scientific and industrial communities due to their structural properties and unique morphology. There has also been growing interest in vertically aligned single walled carbon nanotubes (VA-SWNTs) because of their suitability for building devices such as hydrogen storage and super capacitors. Various methods including chemical vapor deposition (CVD) have been developed for growing VA-SWNTs. Among them is alcohol catalytic CVD which is well known for its economic viability, comprehensive substrates selectivity and good yield of VA-SWNTs. In order to fully understand the growth mechanism of those CNTs, an examination of the role of inputs like hydrocarbon flow rate, reaction time, chamber temperature, and pressure is essential. This work studies the controllability of VA-SWNTs growth by a hybrid process model of an experimental design and an artificial neural network (ANN). Process analysis shows that CVD pressure and temperature are the most significant input factors. In addition, interactions and response surface plots confirm these results and add that higher temperature and pressure will yield VA-SWNTs with high probability.

Sign in / Sign up

Export Citation Format

Share Document