Increasing the Efficiency of Single Walled Carbon Nanotube Amplification by Fe–Co Catalysts Through the Optimization of CH4/H2 Partial Pressures
Single walled carbon nanotubes (SWNTs) seeds are grown using Fe–Co nanoparticles on
spin-on-glass. The relative efficiency of nucleation and amplification (versus etching) was
investigated as a function of the CH4/H2 feedstock ratio and growth temperature. At 900° C,
maximum amplification is obtained with CH4/H2 ratio of 80: 20 but 60: 40 for nucleation.
Amplification is further enhanced at 800° C, compared with etching dominating at 1000° C.
Amplification of SWNTs is in equilibrium with etching; higher carbon feedstock pressure and …
spin-on-glass. The relative efficiency of nucleation and amplification (versus etching) was
investigated as a function of the CH4/H2 feedstock ratio and growth temperature. At 900° C,
maximum amplification is obtained with CH4/H2 ratio of 80: 20 but 60: 40 for nucleation.
Amplification is further enhanced at 800° C, compared with etching dominating at 1000° C.
Amplification of SWNTs is in equilibrium with etching; higher carbon feedstock pressure and …
Single walled carbon nanotubes (SWNTs) seeds are grown using Fe–Co nanoparticles on spin-on-glass. The relative efficiency of nucleation and amplification (versus etching) was investigated as a function of the CH4/H2 feedstock ratio and growth temperature. At 900 °C, maximum amplification is obtained with CH4/H2 ratio of 80:20 but 60:40 for nucleation. Amplification is further enhanced at 800 °C, compared with etching dominating at 1000 °C. Amplification of SWNTs is in equilibrium with etching; higher carbon feedstock pressure and decreased temperature increase the rate of amplification; the converse increases etching.
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