Influence of Seeding and Bath Conditions in Hydrothermal Growth of Very Thin (20 nm) Single-Crystalline Rutile TiO2 Nanorod Films

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• 作者：Seare A. Berhe ; Soumya Nag ; Zachary Molinets ; W. Justin Youngblood
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：February 27, 2013
• 年：2013
• 卷：5
• 期：4
• 页码：1181-1185
• 全文大小：288K
• 年卷期：v.5,no.4(February 27, 2013)
• ISSN：1944-8252

文摘

New seeding conditions have been examined for the hydrothermal growth of single-crystalline rutile TiO₂ nanorods. Rutile nanorods of 20 nm diameter are grown from seed layers consisting of either (A) TiO₂ or MnOOH nanocrystals deposited from suspension, or (B) a continuous sheet of TiO₂. These seed layers are more effective for seeding the growth of rutile nanorods compared to the use of bare F-SnO₂ substrates. The TiO₂ sheet seeding allows lower concentration of titanium alkoxide precursor relative to previously reported procedures, but fusion of the resulting TiO₂ nanorods into bundles occurs at higher precursor concentration and/or longer growth duration. Performance of polymer-oxide solar cells prepared using these nanorods shows a dependence on the extent of bundling as well as rod height.

Keywords:

single-crystalline; rutile; TiO₂; hydrothermal; growth; control; morphology; polymer; oxide; solar; cell