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Influence of substrates and rutile seed layers on the assembly of hydrothermally grown rutile TiO<sub>2</sub> nanorod arrays

Influence of substrates and rutile seed layers on the assembly of hydrothermally grown rutile TiO2 nanorod arrays

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KALB, Julian, James A. DORMAN, Melanie GERIGK, Vanessa KNITTEL, Claudia S. PLÜISCH, Bastian TREPKA, Daniela LEHR, Alexander WITTEMANN, Sebastian POLARZ, Lukas SCHMIDT-MENDE, 2018. Influence of substrates and rutile seed layers on the assembly of hydrothermally grown rutile TiO2 nanorod arrays. In: Journal of Crystal Growth. 494, pp. 26-35. ISSN 0022-0248. eISSN 1873-5002. Available under: doi: 10.1016/j.jcrysgro.2018.05.004

@article{Kalb2018-07Influ-42491, title={Influence of substrates and rutile seed layers on the assembly of hydrothermally grown rutile TiO2 nanorod arrays}, year={2018}, doi={10.1016/j.jcrysgro.2018.05.004}, volume={494}, issn={0022-0248}, journal={Journal of Crystal Growth}, pages={26--35}, author={Kalb, Julian and Dorman, James A. and Gerigk, Melanie and Knittel, Vanessa and Plüisch, Claudia S. and Trepka, Bastian and Lehr, Daniela and Wittemann, Alexander and Polarz, Sebastian and Schmidt-Mende, Lukas} }

Influence of substrates and rutile seed layers on the assembly of hydrothermally grown rutile TiO<sub>2</sub> nanorod arrays Wittemann, Alexander Plüisch, Claudia S. Wittemann, Alexander Lehr, Daniela Dorman, James A. Gerigk, Melanie Rutile TiO<sub>2</sub> nanorod arrays (NRAs) are applicable in various prospective technologies. Hydrothermal methods present a simple technique to fabricate such NRAs. In this report, we present the fabrication of seed layers for the hydrothermal growth of rutile TiO<sub>2</sub> nanorods via sputter deposition, electron-beam evaporation, and sol-gel method and study the influence of each on the growth behavior. To satisfy the requirements of numerous applications, p-type silicon, platinum, levitating carbon membranes, a template made of polystyrene spheres, and commercial fluorine tin oxide (FTO) were employed as substrates. We document the structural properties of the TiO<sub>2</sub> seed layers and describe the relationship between the characteristics of the seed crystals, the growth evolution, and the appearance of as-grown nanorods. Various growth stages of rutile TiO<sub>2</sub> nanorods are compared depending on whether they are grown on polycrystalline TiO<sub>2</sub> or FTO seed layers. In both cases, a homogenous TiO<sub>2</sub> bottom layer is formed at the seed layer/substrate interface, which is essential for electronic applications such as hybrid solar cells. Detached NRAs illustrate the effect of rutile FTO and TiO<sub>2</sub> on the porosity of this bottom layer. Further details about the formation process of this layer are obtained from the growth on confined seed layers fabricated by electron-beam lithography. Polarz, Sebastian 2018-06-04T13:57:08Z Trepka, Bastian 2018-06-04T13:57:08Z Kalb, Julian eng Gerigk, Melanie Knittel, Vanessa Kalb, Julian Trepka, Bastian Lehr, Daniela Schmidt-Mende, Lukas Schmidt-Mende, Lukas Dorman, James A. Polarz, Sebastian 2018-07 Knittel, Vanessa Plüisch, Claudia S.

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