The Formation of Carbon Microcoils Having the Coil-Type Overall Geometry

Authors

  • Gi-Hwan Kang Center for Green Fusion Technology and Department of Engineering in Energy & Applied Chemistry, Silla University
  • Sung-Hoon Kim Center for Green Fusion Technology and Department of Engineering in Energy & Applied Chemistry, Silla University

DOI:

https://doi.org/10.6000/2369-3355.2015.02.03.5

Keywords:

Coil-type Carbon Microcoils, Growth Mechanism, Coil Geometry, Reaction Time, Thermal Chemical Vapor Deposition

Abstract

Carbon microcoils could be synthesized using a thermal chemical vapor deposition process in which C2H2/H2 is used as the source gas and SF6 as an additive gas. We investigated the formation of carbon microcoils as a function of reaction time to study the growth mechanism of coil-type carbon microcoils, particularly under long reaction time. After the first 5 min of the reaction, wave-like carbon nanocoils were formed along with carbon microcoils at certain positions on the sample. An increase in reaction time (60 min) led to the formation of double helix-type carbon microcoils. Further increase in the reaction time (120 min) led to the formation of twist-type carbon microcoils with occasional growth of the coil-type carbon microcoils on the sample. However, at the longest reaction time (180 min) investigated in this work, we observed a decrease in the density of the carbon microcoils. Based on these results, we determine the optimal reaction time for the growth of double helix-type carbon microcoils and suggest the growth mechanism of the coil-type carbon microcoils with a focus on long reaction time.

References

[1] Pan LJ, Hayashida T, Zhang M, Nakayama Y. Field emission properties of carbon tubule nanocoils. Jpn J Appl Phys 2001; 40: L235-7.
http://dx.doi.org/10.1143/JJAP.40.L235
[2] Amelinckx S, Zhang XB, Bernaerts D, Zhang XF, Ivanov V, Nagy JB. A formation mechanism for catalytically grown helix-shaped graphite nanotubes. Science 1994; 265: 635-9.
http://dx.doi.org/10.1126/science.265.5172.635
[3] Hokushin S, Pan LJ, Konishi Y, Tanaka H, Nakayama Y. Field emission properties and structural changes of a stand-alone carbon nanocoil. Jpn J Appl Phys 2007; 46: L565-7.
http://dx.doi.org/10.1143/JJAP.46.L565
[4] Motojima S, Kawaguchi M, Nozaki K, Iwanaga H. Growth of regularly coiled filaments by Ni catalyzed pyrolysis of acetylene, and their morphology and extension characteristics. Appl Phys Lett 1990; 56: 321-3.
http://dx.doi.org/10.1063/1.102816
[5] Huczko A. Synthesis of aligned carbon nanotubes. Appl Phys A 2002; A74: 617-38.
http://dx.doi.org/10.1007/s003390100929
[6] Chen X, Motojima S. The growth patterns and morphologies of carbon micro-coils produced by chemical vapor deposition. Carbon 1999; 37: 1817-23.
http://dx.doi.org/10.1016/S0008-6223(99)00054-8
[7] Motojima S, Kawaguchi M, Nozaki K, Iwanaga H. Preparation of coiled carbon fibers by catalytic pyrolysis of acetylene, and its morphology and extension characteristics. Carbon 1991; 29: 379-85.
http://dx.doi.org/10.1016/0008-6223(91)90207-Y
[8] Tang N, Wen J, Zhang J, Liu F, Lin K, Du Y. Helical carbon nanotubes: catalytic particle size-dependent growth and magnetic properties. ACS Nano 2010; 4: 241-50.
http://dx.doi.org/10.1021/nn901425r
[9] Chen X, Motojima S. Morphologies of carbon micro-coils grown by chemical vapor deposition. J Mater Sci 1999; 34: 5519-24.
http://dx.doi.org/10.1023/A:1004768629799
[10] Kawaguchi M, Nozaki K, Motojima S, Iwanaga H. A growth mechanism of regularly coiled carbon fibers through acetylene pyrolysis. J Cryst Growth 1992; 118: 309-13.
http://dx.doi.org/10.1016/0022-0248(92)90077-V
[11] Park S, Jeon YC, Kim SH. Effect of injection stage of SF6 flow on carbon micro coils formation. ECS J Solid State Sci Technol 2013; 2: M56-9.
http://dx.doi.org/10.1149/2.004312jss
[12] Jeon YC, Ahn SI, Kim SH. Developing aspect of carbon coils formation during the beginning stage of the process. J Nanosci Nanotechnol 2013; 13: 5754-8.
http://dx.doi.org/10.1166/jnn.2013.7040
[13] Jeon YC and Kim SH. Development of the geometry of carbon microcoils from carbon nanofilaments. Vacuum 2014; 107: 219-24.
http://dx.doi.org/10.1016/j.vacuum.2014.02.008
[14] Yang S, Chen C, and Motojima S. Morphology of the growth tip of carbon microcoils / nanocoils. Diamond Relat Mater 2004; 13: 2152-5.
http://dx.doi.org/10.1016/j.diamond.2004.06.014
[15] Eum JH, Kim SH, Yi SS, and Jang K. Large-scale synthesis of the controlled-geometry carbon coils by the manipulation of the SF6 gas flow injection time. J Nanosci Nanotechnol 2012; 12: 4397-402.
http://dx.doi.org/10.1166/jnn.2012.5940
[16] Rodriguez NM. A review of catalytically grown carbon nanofibers. J Mater Res 1993; 8: 3233-50.
http://dx.doi.org/10.1557/JMR.1993.3233

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Published

2016-01-05

How to Cite

Kang, G.-H., & Kim, S.-H. (2016). The Formation of Carbon Microcoils Having the Coil-Type Overall Geometry. Journal of Coating Science and Technology, 2(3), 100–104. https://doi.org/10.6000/2369-3355.2015.02.03.5

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