RETRACTED: Influence of the RF excitation of the catalyst system on the morphology of multiwalled carbon nanotubes (Retracted article. See vol. 116, pg. 18571, 2012)

被引:18
作者
Biris, Alexandru S. [1 ]
Schmitt, Thomas C.
Little, Reginald B.
Li, Zhongrui
Xu, Yang
Biris, Alexandru R.
Lupu, Dan
Dervishi, Enkeleda
Trigwell, Steve
Miller, Dwight W.
Rahman, Zia
机构
[1] Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USA
[2] Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
[3] US FDA, Natl Ctr Toxicol Res, Jefferson, AR 72079 USA
[4] Elizabeth City State Univ, Dept Chem, Elizabeth City, NC 27909 USA
[5] Natl Inst Res & Dev Isotop & Mol Technol, R-400293 Cluj Napoca, Romania
[6] NASA, Electrostat & Surface Phys Lab, Kennedy Space Ctr, Kennedy Space Ctr, FL 32899 USA
[7] Univ Cent Florida, Adv Mat Proc & Anal Ctr, Orlando, FL 32826 USA
关键词
D O I
10.1021/jp0740346
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Multiwalled carbon nanotubes were synthesized by catalytic chemical vapor deposition using two different methods of heating. By one method, an external resistive tube furnace was used, whereas the other method involved heating with radio frequency excitation by induction coil. A comprehensive comparison was made between these two methods with regards to feed gas utilization, nanotube growth efficiency, nanotube product characterization and morphology, and the formation of amorphous carbon and gaseous byproducts. The carbon nanotubes synthesized using radio frequency excitation exhibited smaller outer diameters, fewer carbon layers, less amorphous carbon, and superior crystalline properties than those produced by external tube furnace. The radio frequency process resulted in more rapid and sustained growth rates of the nanotubes and more efficient use of the carbon source. The reason for these enhanced effects by inductive heating may be due not only to the internally produced thermodynamic heat flow characteristics but perhaps also to induced electron currents generated within the magnetic and metallic catalytic clusters due to RF.
引用
收藏
页码:17970 / 17975
页数:6
相关论文
共 22 条
[1]   Growing carbon nanotubes [J].
Ando, Yoshinori ;
Zhao, Xinluo ;
Sugai, Toshiki ;
Kumar, Mukul .
MATERIALS TODAY, 2004, 7 (10) :22-29
[2]   THE ORIGIN OF THE BARRIERS TO THERMALLY ALLOWED, 6-ELECTRON, PERICYCLIC-REACTIONS - THE EFFECT OF HOMO HOMO INTERACTIONS ON THE TRIMERIZATION OF ACETYLENE [J].
BACH, RD ;
WOLBER, GJ ;
SCHLEGEL, HB .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (10) :2837-2841
[3]   Synthesis of single-wall carbon nanotubes by catalytic decomposition of hydrocarbons [J].
Colomer, JF ;
Bister, G ;
Willems, I ;
Kónya, Z ;
Fonseca, A ;
Van Tendeloo, G ;
Nagy, JB .
CHEMICAL COMMUNICATIONS, 1999, (14) :1343-1344
[4]   CVD synthesis of high-purity multiwalled carbon nanotubes using CaCO3 catalyst support for large-scale production [J].
Couteau, E ;
Hernadi, K ;
Seo, JW ;
Thiên-Nga, L ;
Mikó, C ;
Gaál, R ;
Forró, L .
CHEMICAL PHYSICS LETTERS, 2003, 378 (1-2) :9-17
[5]   Single-wall nanotubes produced by metal-catalyzed disproportionation of carbon monoxide [J].
Dal, HJ ;
Rinzler, AG ;
Nikolaev, P ;
Thess, A ;
Colbert, DT ;
Smalley, RE .
CHEMICAL PHYSICS LETTERS, 1996, 260 (3-4) :471-475
[6]   Raman spectroscopy on isolated single wall carbon nanotubes [J].
Dresselhaus, MS ;
Dresselhaus, G ;
Jorio, A ;
Souza, AG ;
Saito, R .
CARBON, 2002, 40 (12) :2043-2061
[7]  
GREGG GSB, 2006, J PHYS CHEM B, V110, P1179
[8]   On the role of catalyst, catalyst support and their interaction in synthesis of carbon nanotubes by CCVD [J].
Hernadi, K ;
Kónya, Z ;
Siska, A ;
Kiss, J ;
Oszkó, A ;
Nagy, JB ;
Kiricsi, I .
MATERIALS CHEMISTRY AND PHYSICS, 2003, 77 (02) :536-541
[9]   HELICAL MICROTUBULES OF GRAPHITIC CARBON [J].
IIJIMA, S .
NATURE, 1991, 354 (6348) :56-58
[10]  
KITIAMA B, 2000, CHEM PHYS LETT, V17, P497