Figure 5.

SEM images of aligned SWNTs with 3-μm-wide electrodes and solutions with different concentrations: a 0.2 mg/ml, b 0.1 mg/ml, c 0.05 mg/ml, d 0.025 mg/ml, and e 0.0125 mg/ml

Li and Xue Nanoscale Research Letters 2010 5:1072-1078   doi:10.1007/s11671-010-9604-3