Order and disorder of carbon deposit produced by arc discharge in liquid nitrogen

We have investigated the formation and the morphology of carbon deposit on the cathode, after arc discharge between two graphite electrodes immersed in liquid nitrogen. We show that the deposit is mainly composed of disordered carbon structures at the bottom and at the external part of the deposit, forming like a bowl, whereas randomly oriented carbon nanotubes (CNTs) aggregated as pillars are found at the center of the deposit. The spatial distribution of the two kinds of structures in the deposit, the size and the sharpness of the CNT pillars are found to depend both on the applied voltage and the current values used for the arc discharge. A correlation between the plasma temperature field and the morphology of the deposit is reported.

[1]  T. Ebbesen,et al.  Mechanism of carbon nanotube formation in the arc discharge. , 1995, Physical review. B, Condensed matter.

[2]  P. Ajayan,et al.  Balance of graphite deposition and multishell carbon nanotube growth in the carbon arc discharge , 1997 .

[3]  N. Koprinarov,et al.  Carbon macrostructures obtained at AC arc discharge , 1997 .

[4]  Alain Gleizes,et al.  A Mathematical Model of the Carbon Arc Reactor for Fullerene Synthesis , 1998 .

[5]  J. Robertson,et al.  Interpretation of Raman spectra of disordered and amorphous carbon , 2000 .

[6]  Thomsen,et al.  Double resonant raman scattering in graphite , 2000, Physical review letters.

[7]  Masa Ishigami,et al.  A simple method for the continuous production of carbon nanotubes , 2000 .

[8]  J. Robertson.  Diamond-like amorphous carbon , 2002 .

[9]  Double resonance Raman spectroscopy of single-wall carbon nanotubes , 2003 .

[10]  I. Alexandrou,et al.  Structure of carbon onions and nanotubes formed by arc in liquids. , 2004, The Journal of chemical physics.

[11]  A. Martin,et al.  Comparative study of first- and second-order Raman spectra of MWCNT at visible and infrared laser excitation , 2006 .

[12]  M. Dresselhaus,et al.  Studying disorder in graphite-based systems by Raman spectroscopy. , 2007, Physical chemistry chemical physics : PCCP.

[13]  G. Compagnini,et al.  Direct observation of the formation of linear C chain/carbon nanotube hybrid systems , 2009 .

[14]  Peter J. F. Harris,et al.  Carbon Nanotube Science: Frontmatter , 2009 .

[15]  P. Russo,et al.  Controlled synthesis of carbon nanotubes and linear C chains by arc discharge in liquid nitrogen , 2010 .

[16]  S. Bagiante,et al.  Role of the growth parameters on the structural order of MWCNTs produced by arc discharge in liquid nitrogen , 2010 .