Figure 3.

TEM images of MnO2/PANI composites synthesized at different acid concentrations. (A) 1, (B) 0.5, (C) 0.2, (D) 0.1, (E) 0.05, and (F) 0 M HClO4.

Meng et al. Nanoscale Research Letters 2013 8:179   doi:10.1186/1556-276X-8-179
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