Figure 4.

aCV curves for the 1st, 500th, 1,000th, and 2,000th cycles for the MnO2thin film synthesized at RT andbthe variation of specific capacitance with respect to cycle number for the MnO2thin film synthesized at RT

Xia et al. Nanoscale Research Letters 2009 4:1035   doi:10.1007/s11671-009-9352-4