CARBON NANOWALLS GROWN BY HFCVD ON GLASS SUBSTRATE

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GHORANNEVISS M.; ALIZADEH ESLAMI P.; NASIRI LAHEGHI S.

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Journal: JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY) Year:2009 | Volume:19 | Issue:71 (PHYSIC ISSUE) Page(s): 101-108

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Title

CARBON NANOWALLS GROWN BY HFCVD ON GLASS SUBSTRATE

Author(s)

GHORANNEVISS M. | ALIZADEH ESLAMI P. | NASIRI LAHEGHI S. | Issue Writer Certificate

Keywords

CARBON NANOWALLSQ3

NANOCRYSTALLINE DIAMONDQ3

HOT FILAMENT CHEMICAL VAPOR DEPOSITIONQ3

SPUTTERINGQ3

Abstract

Introduction: Self-assembled carbon nanostructures like carbon nanotubes (CNTs) and nanofibers have attracted much attention for several applications, such as gas storage, membranes for electrochemical energy storage, and field emitters. In addition, twodimensional graphitic carbon structures, commonly referred to as CARBON NANOWALLS (CNWs) or nanoflakes, are found attractive both as far as their structures, and their applications due to their high surface to volume ratios. Moreover, these structures have a great potential to act as metallic clusters supporting elements for electrochemical fuel cells. The morphologies of the metallic clusters supports have much effect on the chemical activity of the metallic clusters themselves. Also, the CARBON NANOWALLS very sharp and thin edges being perpendicular to the substrate can act as field emitters.Aim: This work concentrates on the growth of CARBON NANOWALLS (CNWs) on a glass substrate coated with Fe nanocatalyst. Parameters affecting the growth of CNWs such as hydrocarbon gas, flow ratio, deposition time, and temperature are investigated.Materials and Methods: In this paper, a glass substrate is coated with Fe nanocatalyst by low temperature plasma. Carbon nanostructures (two-dimensional carbon nanostructures, CNTs, and diamond nanocrystals) are grown on the Fe-glass substrate by HOT FILAMENT CHEMICAL VAPOR DEPOSITION (HFCVD) using carbon sources such as acetylene (C2H2), methane (CH4), and diluting the gases such as hydrogen (H2) and ammonia (NH3). Surface morphology of the substrate is observed by atomic force microscopy (AFM). Samples are characterized by scanning electron microscopy (SEM) and Raman spectroscopy.Results: CNWs were obtained by the HFCVD by applying C2H2/NH3/H2 mixture (20:80:100 sccm) for 45 minutes, and at 600°C. Results show that diamond configuration of nanocrystals formed by HFCVD employing CH4/NH3/H2 (20:80:100 sccm) for 45 minutes, and 600°C substrate temperature. The results show that the increase of the deposition time from 45 to 60minutes causes a decrease of crystallite size (La), and a distribution of CNWs on the surface. Increase of the C2H2 flow ratio renders an increase of La with high density of CNWs on the surface.Conclusion: As one important conclusion in this work, is that the growth of CNWs, and diamond nanocrystals on the Fe-glass substrate depend on the hydrocarbon gas species in the fed gas. It is also determined that, an increase of the temperature from 600°C to 700°C causes the formation of the CNTs on the substrate.

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APA: Copy

GHORANNEVISS, M., ALIZADEH ESLAMI, P., & NASIRI LAHEGHI, S.. (2009). CARBON NANOWALLS GROWN BY HFCVD ON GLASS SUBSTRATE. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 19(71 (PHYSIC ISSUE)), 101-108. SID. https://sid.ir/paper/70278/en

Vancouver: Copy

GHORANNEVISS M., ALIZADEH ESLAMI P., NASIRI LAHEGHI S.. CARBON NANOWALLS GROWN BY HFCVD ON GLASS SUBSTRATE. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)[Internet]. 2009;19(71 (PHYSIC ISSUE)):101-108. Available from: https://sid.ir/paper/70278/en

IEEE: Copy

M. GHORANNEVISS, P. ALIZADEH ESLAMI, and S. NASIRI LAHEGHI, “CARBON NANOWALLS GROWN BY HFCVD ON GLASS SUBSTRATE,” JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), vol. 19, no. 71 (PHYSIC ISSUE), pp. 101–108, 2009, [Online]. Available: https://sid.ir/paper/70278/en

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