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Orientation-Control Synthesis of KTa0.25Nb0.75O3 Nanorods

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Abstract:

Single-crystalline KTa0.25Nb0.75O3 (KTN) nanorods with an orthorhombic perovskite structure were synthesized via a polymer-assisted hydrothermal method. The preferred crystallographic orientation of the nanorods were found to be controllable by using different types of polymers in the process; that is, [001]-oriented KTN were obtained upon the use of polyvinyl alcohol (PVA) and [110]-oriented ones were formed with the use of a combination of polyacrylic acid and PVA. The two types of nanorods showed different properties. The [110]-oriented nanorods exhibited a better photocatalytic decolorization efficiency but very likely a lower thermal conductivity (as indicated by the Raman spectrum measurements) than the [001] nanorods.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1551-2916.2009.03461.x

Affiliations: 1: Key Laboratory of Ferro- & Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics & Electronic Technology, Hubei University, Wuhan 430062, China 2: Department of Applied Physics and Material Research Center, The Hong Kong Polytechnic University, Hong Kong SAR, China

Publication date: March 1, 2010

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