Figure 3.
FESEM images of cv-CeO
2
prepared 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 doi:10.1007/s11671-008-9177-6