Experimental Gibbs Free Energy Considerations in the Nucleation and Growth of Single-Walled Carbon Nanotubes

2005 ◽  
Vol 109 (20) ◽  
pp. 10435-10440 ◽  
Author(s):  
Larry M. Wagg ◽  
G. Louis Hornyak ◽  
Leonid Grigorian ◽  
Anne C. Dillon ◽  
Kim M. Jones ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Gibbs Free Energy ◽  
Single Walled Carbon Nanotubes ◽  
Nucleation And Growth ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

On the loading mechanism of ssDNA into carbon nanotubes

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 56896-56903 ◽  
Author(s):  
Jia-Wei Shen ◽  
Ting Tang ◽  
Xiao-Hong Wei ◽  
Wei Zheng ◽  
Tian-Yang Sun ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Binding Free Energy ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

The loading mechanism and dynamics of ssDNA oligomers into single-walled carbon nanotubes was investigated. The binding free energy is in the order A-zigzag SWNT (24,0) > T-zigzag SWNT (24,0) > A-armchair SWNT (14,14) > T-armchair SWNT (14,14).

Amplification of Single-Walled Carbon Nanotubes from Designed Seeds:  Separation of Nucleation and Growth†

2007 ◽  
Vol 111 (48) ◽  
pp. 17804-17806 ◽  
Author(s):  
Douglas Ogrin ◽  
Robin E. Anderson ◽  
Ramon Colorado, ◽  
Benji Maruyama ◽  
Mark J. Pender ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Nucleation And Growth ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

An Experimental Estimate of the Free Energy of Formation of Single Walled Carbon Nanotubes

2004 ◽  
Vol 858 ◽  
Author(s):  
L. M. Wagg ◽  
G. L. Hornyak ◽  
L. Grigorian ◽  
A. C. Dillon ◽  
K. M. Jones ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Free Energy ◽  
Single Walled Carbon Nanotubes ◽  
Feed Composition ◽  
Single Walled Carbon ◽  
Mo Catalyst ◽  
Free Energy Of Formation ◽  
The Difference ◽  
Walled Carbon Nanotubes ◽  
Energy Of Formation

ABSTRACTSingle walled carbon nanotubes (SWNT) were synthesized by methane CVD on a supported mixed transition metal (Fe/Mo) catalyst. Gas feed composition and reaction temperature were varied to identify the threshold conditions for the growth of SWNT. These reaction conditions closely approximate pseudo-equilibrium conditions with some active reaction intermediate (likely chemisorbed carbon atoms) that proceeds to nucleate and grow SWNT. This value also serves as an estimated upper limit of the free energy of formation ΔG*(T)SWNT since the active intermediate proceeds to form SWNT through a process that is thought to be essentially irreversible. The difference relative to graphite is in good agreement with literature values predicted from simulations for SWNT nuclei containing approximately 80 atoms, while considerably larger than that predicted for bulk 5, 5 SWNT. Our estimate over the range 700 to 1000 °C of 16.1 to 13.9 kJ/mol is considerably greater than the free energy of formation for diamond (between 5.8 and 6.9 kJ/mol from 700 to 925 °C).

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