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http://dx.doi.org/10.9713/kcer.2013.51.6.774

A Study on Formation of Vertically Aligned ZnO Nanorods Arrays on a Rough FTO Transparent Electrode by the Introduction of TiO2 Crystalline Nano-sol Blocking Interlayer  

Heo, Jin Hyuck (Department of Chemical Engineering, Kyung Hee University)
You, Myung Sang (Department of Chemical Engineering, Kyung Hee University)
Im, Sang Hyuk (Department of Chemical Engineering, Kyung Hee University)
Publication Information
Korean Chemical Engineering Research / v.51, no.6, 2013 , pp. 774-779 More about this Journal
Abstract
We synthesized the solution processible monodispersed $TiO_2$ crystalline nano-sol with ~ 5 nm in size by sol-gel method. Through the spin-coating of crystalline $TiO_2$ nano-sol at low processing temperature, we could make even blocking interlayer on the rough FTO transparent electrode substrate. The rough FTO surface could be gradually smoothed by the spin-coating of nano-crystalline $TiO_2$ sol based blocking interlayer. The 1, 2.5, 5, and 10 wt% of nanocrystalline $TiO_2$ sol formed 29, 38, 62, and 226 nm-thick of blocking interlayer in present experimental condition, respectively. The 5 and 10 wt% of $TiO_2$ nano-sol could effectively fill up the valley part of bare FTO with 48.7 nm of rms (root mean square) roughness and consequently enabled the ZnO to be grown to vertically aligned one dimensional nanorods on the flattened blocking interlayer/FTO substrate.
Keywords
$TiO_2$ Nano-sol; ZnO Nanorods; Surface Roughness; Vertical Alignment; Photoanode;
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Times Cited By KSCI : 3  (Citation Analysis)
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