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Title: Growth of La2CuO4 nanofibers under a mild condition by using single walled carbon nanotubes as templates
Authors: Gao, L.
Wang, X.
Tong Chua, H.
Kawi, S. 
Keywords: Hydrothermal synthesis
La2CuO4 nanofibers
Single walled carbon nanotubes
Issue Date: Jul-2006
Citation: Gao, L., Wang, X., Tong Chua, H., Kawi, S. (2006-07). Growth of La2CuO4 nanofibers under a mild condition by using single walled carbon nanotubes as templates. Journal of Solid State Chemistry 179 (7) : 2036-2040. ScholarBank@NUS Repository.
Abstract: La2CuO4 nanofibers (ca. 30 nm in diameter and 3 μm in length) have been grown in situ by using single walled carbon nanotubes (SWNTs; ca. 2 nm in inner diameter; made via cracking CH4 over the catalyst of Mg0.8Mo0.05Ni0.10Co0.05Ox at 800 °C) as templates under mild hydrothermal conditions and a temperature around 60 °C. During synthesis, the surfactant poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) and H2O2 were added to disperse SWNTs and oxidize the reactants, respectively. The structure of La2CuO4 nanofibers was confirmed by powder X-ray diffraction (XRD) and their morphologies were observed with field emission scanning electron microscope (FESEM) at the hydrothermal synthesis lasting for 5, 20 and 40 h, respectively. The La2CuO4 crystals grew from needle-like (5 h) through stick-like (20 h) and finally to plate-like (40 h) fibers. Twenty hours is an optimum reaction time to obtain regular crystal fibers. The La2CuO4 nanofibers are probably cubic rather than round and may capsulate SWNTs. © 2006 Elsevier Inc. All rights reserved.
Source Title: Journal of Solid State Chemistry
ISSN: 00224596
DOI: 10.1016/j.jssc.2006.04.003
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