Fast Growth of Highly Ordered TiO<sub>2</sub> Nanotube Arrays on Si Substrate under High-Field Anodization.

Nanomicro Lett · 2017 · PMC6223787 · PMID 30460310

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a decreasing trendno p-value reported

Hence, the current density exhibits a decreasing trend in the fourth stage.

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an increasing trendno p-value reported

Upon increasing the NH 4 F content, the length of TiO 2 NTAs exhibits an increasing trend [ 18 , 45 , 46 ], ranging from 766 to 1285 nm (Fig. 9 b, d, f).

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