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|Title:||Single-walled nanohorns and other nanocarbons generated by submerged arc discharge between carbon electrodes in liquid argon and other media|
Rao, C. N. R.
Single-Walled Carbon Nanohorns
Submerged Arc Discharge
Multi-Walled Carbon Nanotubes
|Publisher:||IoP Publishing Ltd|
|Citation:||Vasu, K; Pramoda, K; Moses, K; Govindaraj, A; Rao, CNR, Single-walled nanohorns and other nanocarbons generated by submerged arc discharge between carbon electrodes in liquid argon and other media. Materials Research Express 2014, 1 (1), 15001 http://dx.doi.org/10.1088/2053-1591/1/1/015001|
Materials Research Express
|Abstract:||Arc discharge between two graphite electrodes submerged in different liquid media yields various dimensional nanocarbon structures such as 1D carbon nanotubes and 2D graphene. Single-walled carbon nanohorns (SWNHs) prepared by submerged arc discharge in liquid nitrogen medium are found to have nitrogen impurities. Here, we report the structure and properties of pure and nitrogen-doped SWNHs obtained by submerged arc discharge in a liquid argon medium. The absence of an XPS N 1s signal, which is present in nanohorns obtained in liquid nitrogen, indicate that the nanohorns are free from nitrogen impurities. Raman spectra show a strong defect-induced D band and current-voltage characteristics show a slight nonlinear behavior. N-2 adsorption of pure SWNHs shows type-IV isotherms with a surface area of 300 m(2) g(-1). Adsorption of CO2 and H-2 in pure SWNHs has also been measured. Arc discharge in other liquid media such as water, ethanol, dimethylformamide (DMF), n-methyl pyrrolidone (NMP), formamide, benzene, heptane and acetone yields different nanocarbon structures including multi-walled carbon nanotubes (MWNTs), few-layer graphene, carbon onions and carbon nanoparticles.|
|Appears in Collections:||Research Papers (Prof. C.N.R. Rao)|
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