Mechanism for the formation of low aspect ratio of La(OH)3 nanorods in aqueous solution: thermal and frequency dependent behaviour

Kohli, P.S. and Kumar, Manish and Raina, K.K. and Singla, M.L. (2012) Mechanism for the formation of low aspect ratio of La(OH)3 nanorods in aqueous solution: thermal and frequency dependent behaviour. Journal of Materials Science: Materials in Electronics, 23 (12). pp. 2257-2263. ISSN 0957-4522

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Abstract

La(OH)3 nanorods of length varying between 30 and 50 nm with aspect ratio of 2–5 were synthesized in aqueous solution using hydrazine hydrate in presence of mixture of cationic N-cetyl-N,N,N,trimethylammonium bromide (CTAB) and tetra-n-butylammonium bromide (TBAB) surfactants. The resultant product was characterized for its morphology and structure using XRD, TEM and FT-IR. Thermal stability studied using TGA indicated good stability. Surfactants in reaction mixture reduces the surface tension of the solution which lowers the energy needed to form a new phase, resulting in the formation of La(OH)3 crystals of anisotropic shape with low aspect ratio. The A.C. conductivity was found to be of the order of nano-seimen (ns), which non-linearly increases with the increase in frequency (102–106 Hz) The capacitance behaviour was observed in pF in mid frequency region, which can be useful as low loss dielectric material. Nano rods may work as standard materials to monitor conductivity levels in biofluid proteins.

Item Type: Article
Subjects: CSIO > Chemistry
Divisions: Agri - Instrumentation
Depositing User: Ms. J Shrivastav
Date Deposited: 25 Feb 2013 04:32
Last Modified: 25 Feb 2013 04:32
URI: http://csioir.csio.res.in/id/eprint/331

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