Decoupling Catalyst Dewetting, Gas Decomposition, and Surface Reactions in Carbon Nanotube Forest Growth Reveals Dependence of Density on Nucleation Temperature

2019 ◽  
Vol 123 (47) ◽  
pp. 28726-28738 ◽  
Author(s):  
Jaegeun Lee ◽  
Moataz Abdulhafez ◽  
Mostafa Bedewy
Keyword(s):  
Carbon Nanotube ◽  
Surface Reactions ◽  
Forest Growth ◽  
Nucleation Temperature

Modulation of carbon nanotube yield and type through the collective effects of initially deposited catalyst amount and MgO underlayer annealing temperature

MRS Advances ◽  
2018 ◽  
Vol 4 (3-4) ◽  
pp. 139-146
Author(s):  
Takashi Tsuji ◽  
Guohai Chen ◽  
Kenji Hata ◽  
Don N. Futaba ◽  
Shunsuke Sakurai
Keyword(s):  
Carbon Nanotube ◽  
Annealing Temperature ◽  
Catalyst Surface ◽  
Catalyst System ◽  
Forest Growth ◽  
Collective Effects ◽  
High Yield ◽  
Force Microscopy ◽  
Atomic Force ◽  
Fe Catalysts

ABSTRACTRecently, the millimetre-scale, highly efficient growth of single-wall carbon nanotube (SWCNT) forests from iron (Fe) catalysts has been reported through the annealing of the magnesia (MgO) underlayer. Here, we report the modulation of the CNT yield (height) and average number of CNT walls for a Fe/MgO catalyst system through the collective effects of initial Fe amount and MgO annealing temperature. Our results revealed the existence of a well-defined region for high yield SWCNT forest growth in the domain of deposited Fe thickness and MgO annealing temperature. Through topographic examinations of the catalyst surface using atomic force microscopy, we confirmed that our results stem from the collective effects of increased amounts of surface-bound Fe through the amount of deposition and suppression of Fe subsurface diffusion, together govern the amount of surface-bound catalyst. The combination of these mechanisms determined the final nanoparticle size, density, and stability and could explain the three distinctly defined regions: low yield SWCNT growth, high yield SWCNT growth, and high yield multiwall CNT growth. Furthermore, we explained the observed borders between these three regions.

Improved and Large Area Single-Walled Carbon Nanotube Forest Growth by Controlling the Gas Flow Direction

ACS Nano ◽  
2009 ◽  
Vol 3 (12) ◽  
pp. 4164-4170 ◽  
Author(s):  
Satoshi Yasuda ◽  
Don N. Futaba ◽  
Takeo Yamada ◽  
Junichi Satou ◽  
Akiyoshi Shibuya ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Gas Flow ◽  
Flow Direction ◽  
Forest Growth ◽  
Large Area ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon

scholarly journals The Infinite Possible Growth Ambients that Support Single-Wall Carbon Nanotube Forest Growth

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Hiroe Kimura ◽  
Jundai Goto ◽  
Satoshi Yasuda ◽  
Shunsuke Sakurai ◽  
Motoo Yumura ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Forest Growth ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon

Manual spray coating: A cheap and effective method to build catalyst layers for carbon nanotube forest growth

2019 ◽  
Vol 689 ◽  
pp. 137491
Author(s):  
Lilla Nánai ◽  
Anna Szabó ◽  
Tamás Gyulavári ◽  
Judit Budai ◽  
Klara Hernadi
Keyword(s):  
Carbon Nanotube ◽  
Spray Coating ◽  
Forest Growth ◽  
Catalyst Layers

Evolution of implanted Fe ions in SiO2/Si wafer into uniformly sized catalyst particles for carbon nanotube forest growth

Carbon ◽  
2017 ◽  
Vol 123 ◽  
pp. 122-128 ◽  
Author(s):  
Cheol-Hun Lee ◽  
Jaegeun Lee ◽  
Sunmog Yeo ◽  
Sung-Hyun Lee ◽  
Teawon Kim ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Forest Growth ◽  
Fe Ions ◽  
Si Wafer

High-Density Carbon Nanotube Forest Growth on Copper Foil for Enhanced Thermal and Electrochemical Interfaces

2019 ◽  
Vol 3 (1) ◽  
pp. 77-83
Author(s):  
Bethany. R. Lettiere ◽  
Cecile A. C. Chazot ◽  
Kehang Cui ◽  
A. John Hart
Keyword(s):  
Carbon Nanotube ◽  
Copper Foil ◽  
Forest Growth ◽  
High Density ◽  
Electrochemical Interfaces

scholarly journals Morphological Instabilities and the Dynamics of Carbon Nanotube Forest Growth

2019 ◽  
Vol 35 (25) ◽  
pp. 3-12 ◽  
Author(s):  
Paul Finnie ◽  
Phillip Vinten ◽  
Paul Marshall ◽  
Jacques Lefebvre
Keyword(s):  
Carbon Nanotube ◽  
Forest Growth ◽  
Morphological Instabilities

Observation of Oscillatory Surface Reactions of Riboflavin, Trolox, and Singlet Oxygen Using Single Carbon Nanotube Fluorescence Spectroscopy

ACS Nano ◽  
2012 ◽  
Vol 6 (12) ◽  
pp. 10632-10645 ◽  
Author(s):  
Fatih Sen ◽  
Ardemis A. Boghossian ◽  
Selda Sen ◽  
Zachary W. Ulissi ◽  
Jingqing Zhang ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Fluorescence Spectroscopy ◽  
Singlet Oxygen ◽  
Surface Reactions
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