Research Article

Photoelectrochemical Performance of Smooth TiO2 Nanotube Arrays: Effect of Anodization Temperature and Cleaning Methods

Figure 6

Raman spectra of (a) as-anodized TiO2 nanotube arrays fabricated at 40°C, (b) as-anodized TiO2 nanotube arrays fabricated at 60°C, (c) annealed TiO2 nanotube arrays fabricated at 40°C, and (d) annealed TiO2 nanotube arrays fabricated at 60°C (A: anatase).
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