High emission current density microwave-plasma-grown carbon nanotube arrays by postdepositional radio-frequency oxygen plasma treatment

2005 ◽  
Vol 87 (24) ◽  
pp. 243104 ◽  
Author(s):  
Z. Chen ◽  
D. den Engelsen ◽  
P. K. Bachmann ◽  
V. van Elsbergen ◽  
I. Koehler ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Plasma Treatment ◽  
Current Density ◽  
Oxygen Plasma ◽  
Microwave Plasma ◽  
Emission Current Density ◽  
Oxygen Plasma Treatment ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
High Emission

scholarly journals Effect of Dry Oxidation on the Performance of Carbon Nanotube Arrays Electrochemical Capacitors

2012 ◽  
Vol 1407 ◽  
Author(s):  
Adrianus I. Aria ◽  
Morteza Gharib
Keyword(s):  
Carbon Nanotube ◽  
Plasma Treatment ◽  
Specific Capacitance ◽  
Oxygen Plasma ◽  
Electrochemical Capacitors ◽  
Oxygen Plasma Treatment ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Dry Oxidation ◽  
Oxidized Carbon

ABSTRACTIn this study, the effect of dry oxidation on the electrochemical properties of carbon nanotube arrays is investigated. Oxygenated surface functional groups were introduced to the arrays by oxygen plasma treatment, where their surface concentrations were varied by controlling the exposure time. The finding presented herein shows an augmentation of nearly thirty times in term of specific capacitance when the arrays are oxidized. Similar behavior is also observed in the non-aqueous electrolytes where the specific capacitance of the oxidized carbon nanotube arrays is measured more than three times higher than that of the pristine ones. However, overexposure to oxygen plasma treatment reverses this effect. At such high oxidation level, the damage to the graphitic structure becomes more pronounced such that the capacitive behavior of the arrays is overshadowed by their resistive behavior. These findings are important for further development of carbon nanotube based electrochemical capacitors.

Adhesive Enhancement Improved Field Emission Characteristics of Carbon Nanotube Arrays on Energetic Ion Pre-Bombarded Si Substrates

2011 ◽  
Vol 483 ◽  
pp. 589-594 ◽  
Author(s):  
Jian Hua Deng ◽  
Peng Cheng Sun ◽  
Zhao Xia Ping ◽  
Guo An Cheng ◽  
Rui Ting Zheng
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Current Density ◽  
Emission Current Density ◽  
Emission Current ◽  
Nanotube Arrays ◽  
Iron Ion ◽  
Si Substrate ◽  
Si Substrates ◽  
Carbon Nanotube Arrays

Field emission (FE) characteristics of well-aligned multiwall carbon nanotube arrays (CNTAs) grown on originally polished and energetic iron ion bombarded Si substrates were investigated. It was found that the FE characteristics have been improved remarkably by the pretreatment of iron ion bombardment, an evident promotion of the highest emission current density from 4.05 mA/cm2to 54.45 mA/cm2was as an expression of this enhancement, this enhancement in characteristics is attributed to the improved adhesion between CNTs and Si substrate for the existence of iron buffer layer. The relationship between adhesive force and emission current density has been introduced, and the calculation reveals that the adhesion has been enhanced by 14.4 times due to the energetic ion pre-bombardment on Si substrate.

High emission current density, vertically aligned carbon nanotube mesh, field emitter array

2010 ◽  
Vol 97 (11) ◽  
pp. 113107 ◽  
Author(s):  
Chi Li ◽  
Yan Zhang ◽  
Mark Mann ◽  
David Hasko ◽  
Wei Lei ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Current Density ◽  
Emission Current Density ◽  
Emission Current ◽  
Field Emitter ◽  
High Emission ◽  
Vertically Aligned ◽  
Emitter Array ◽  
Field Emitter Array

Enhanced Wettability of Nanocrystalline Diamond Films for Biocoating Applications

2012 ◽  
Vol 1395 ◽  
Author(s):  
Jason H. C. Yang ◽  
Kungen Teii
Keyword(s):  
Contact Angle ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Microwave Plasma ◽  
Hydrogen Plasma ◽  
Film Surface ◽  
Chemical Vapor ◽  
Nanocrystalline Diamond ◽  
Polar Component ◽  
Oxygen Plasma Treatment

ABSTRACTNanocrystalline diamond (NCD) films are prepared from Ar-rich/N2/CH4 and Ar-rich/H2/CH4 mixtures by microwave plasma-enhanced chemical vapor deposition, and further treated by microwave hydrogen and oxygen plasma exposures separately to enhance the wetting property. The hydrogen plasma treatment has small effect on the surface roughness, while the oxygen plasma treatment forms fine protrusions on the film surface. Results show that the wettability of the hydrogen plasma treated NCD film is nearly constant or little improvement as the polar component of the apparent surface free energy is close to the as-deposit NCD film. In contrast, the wettability of the oxygen plasma treated NCD film is improved dramatically such that the contact angle is reduced from 92º and 4.7º to almost 0º for water and 1-bromonaphthalene, respectively, and the polar component increases significantly to 34 mJ/m2. The low contact angle suggests that the film is considerably a cell adhesive friendly surface, which is essential in maintaining multicellular structure, and thus making it a favorable wetting surface for biological and biomedical applications.

scholarly journals Morphology engineering of hollow carbon nanotube pillars by oxygen plasma treatment

Carbon ◽  
2015 ◽  
Vol 81 ◽  
pp. 376-387 ◽  
Author(s):  
Adrianus I. Aria ◽  
Bradley J. Lyon ◽  
Morteza Gharib
Keyword(s):  
Carbon Nanotube ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Morphology Engineering ◽  
Hollow Carbon

High-strength composite yarns derived from oxygen plasma modified super-aligned carbon nanotube arrays

Nano Research ◽  
2013 ◽  
Vol 6 (3) ◽  
pp. 208-215 ◽  
Author(s):  
Haoming Wei ◽  
Yang Wei ◽  
Yang Wu ◽  
Liang Liu ◽  
Shoushan Fan ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Oxygen Plasma ◽  
High Strength ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays

Effect of oxygen plasma treatment on the mechanical properties of carbon nanotube fibers

2015 ◽  
Vol 156 ◽  
pp. 17-20 ◽  
Author(s):  
Ok-Kyung Park ◽  
Woo Young Kim ◽  
Seung Min Kim ◽  
Nam-Ho You ◽  
Youngjin Jeong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Plasma Treatment ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Effect Of Oxygen ◽  
Carbon Nanotube Fibers
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