Figure 3.

FESEM images of cv-CeO2prepared at a sweep rate of 20 mV s−1(a), 30 mV s−1(b), and 50 mV s−1(c) for 2 h

Fu et al. Nanoscale Research Letters 2008 3:431-434   doi:10.1007/s11671-008-9177-6