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. 2017 Jun 6;12:390. doi: 10.1186/s11671-017-2163-0

Fig. 7.

Fig. 7

(Color online) SEM images of modified FTO electrodes under different fabrication conditions, including a lifting speed of 2000 μm/s, b lifting speed of 1000 μm/s, c precursor concentration of 1:3, d precursor concentration of 1:4, e dipping number of 3, and f dipping number of 5