Authors: Saini, Mamta¹; Vivekanand, K.¹; Poddar, Pankaj¹; Murty, K.V.G.K.²; Thushara, K.S.³; Gopinath, Chinnakonda S.⁴

Source: International Journal of Nanotechnology, Volume 7, Numbers 9-10, 2010 , pp. 919-931(13)

Publisher: Inderscience Publishers

Abstract:

Ferroelectric BaTiO<SUB align=right>3 (BTO) and Ba<SUB align=right>0.8Sr<SUB align=right0.2TiO<SUB align=right>3 (BSTO) thin film materials have been successfully prepared by sol-gel processing and simple dip coating on glass and silicon supports. Above thin films were characterised by x-ray diffraction (XRD), Raman spectroscopy, photoelectron spectroscopy, thermal analysis, atomic force microscopy (AFM) and spectroscopic ellipsometry. Phase identification of BaTiO<SUB align=right>3 and Ba<SUB align=right>0.8Sr<SUB align=right>0.2TiO<SUB align=right>3 was performed by XRD. XRD and Raman spectroscopy investigations demonstrate that the Ba<SUB align=right>0.8Sr<SUB align=right>0.2TiO<SUB align=right>3 film exhibits tetragonal structure. AFM analysis demonstrates the elongated nanospherical particles on glass substrate and nanowires on silicon substrate, which represent a strong influence of the crystallinity of underlying substrate on the grain morphology in this technique. The thin films on both the substrates are uniformly coated without any pinhole to a significant area (&#126;2.5 cm&#178;), and this method might be extended to large area uniform coating. Spectroscopic ellipsometric measurements reveal the exact thickness, refractive index and extinction coefficient of the thin films.

Keywords: SCIENCE, ENGINEERING AND TECHNOLOGY; Materials and Manufacturing; Nanoscience and Nanotechnology

Document Type: Research article

DOI: http://dx.doi.org/10.1504/IJNT.2010.034698

Affiliations: 1: Physical Chemistry Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India. 2: AU-KBC Research Center, MIT Campus of Anna University, Chromepet, Chennai 600 044, India. 3: Catalysis Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India. 4: Catalysis Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India

Publication date: 2010-08-01

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