Research Article
Optimal Synthesis of Horizontally Aligned Single-Walled Carbon Nanotubes and Their Biofunctionalization for Biosensing Applications
Figure 2
Scanning electron microscopy (SEM) images representing an effect of total flow rate (in unit of standard cubic centimeter (SCCM)) of feedstock gases while maintaining a relative flow rate ratio of H2 and CH4, which is two, during HACNT arrays growth on their morphologies and densities. Total flow rate varies at (a) 4.5, (b) 6.0, (c) 7.5, and (d) 9.0, respectively. Note that no tubes were nearly grown at the total flow rate of 9.0. Left (or right) image of each subfigure set corresponds to a regime of the array grown near (or far from) Fe catalyst in the growth direction.
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