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ABSTRACT
Spray pyrolytic deposition (SPD) of titania films on borosilicate glass substrates has been carried out using oxime-modified titanium(IV) isopropoxide, [Ti(OiPr)2{ONC(CH3)2}2]. Thermal study of the above complex indicates one step decomposition to TiO2 at low temperature (< 250 °C), making it a versatile SPD precursor to deposit titania film at low temperature. The XRD analyses of the deposited titania films indicate presence of amorphous titania over glass substrate. The deposition of titania films was further confirmed by the EDX analyses. The SEM images of the titania films over glass substrates indicate presence of crack-free titania films having thickness in the range of 1.28–1.45 µm. AFM images of titania-coated glass sample represent growth of smooth structures of titania. The transmittance of the deposited titania films over glass lies in the range of 77–86% in the visible region.
Acknowledgment
We are thankful to ONRG, Singapore, for financial assistance under NICOP program (grant no. N62909-14-1-N042). The authors would like to thank the Central Analytical Facilities, Manipal University Jaipur for FTIR and Material research center, MNIT in Jaipur for NMR, TGA, XRD, SEM investigations.
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Ajay Saini
Dr. Ajay Saini received his PhD degree in Nano-fabrication of oxides nanostructures and their applications from Manipal University Jaipur (MUJ), India and was working as Scientific Officer at Central Analytical Facilities, MUJ. He worked in industry after his masters and have experience in multi-step synthesis and characterization of new drug entities from lab scale to pilot plant scale, technology transfer for large scale production. He also served as Lecturer in Chemistry at Pratap University Jaipur. His research focus is on precursor-directed synthesis of oxides nanostructures and their use in various applications.
Dalip Singh
Dr. Dalip Singh has completed his PhD degree in Metal oxide coating to improve corrosion resistivity over aluminium alloy from Manipal University Jaipur, India and he is working as Assistant professor in Department of Automobile engineering, MUJ. He has 15 year experience in academic and his research focus is on metal oxide coatings used for Anti corrosion behaviour on different metals.
Veena Dhayal
Dr. Veena Dhayal is an Assistant Professor in the Department of Chemistry of Manipal University Jaipur. She obtained her Ph.D. in Inorganic Chemistry from University of Rajasthan, Jaipur in 2009 on Synthetic studies and structural aspects of some single source precursors of Silicon(IV) and related metals for preparation of materials. She then served as a Research Associate in the same department for more than 1 year, where she conducted research into Hybrid Inorganic- Organic nanomaterials based on organically modified metal alkoxides: Syntheses and characterization. Subsequently, she joined the department of chemistry, Central University of Rajasthan, Ajmer, Rajasthan, as an Assistant Professor in July 2010. Afterward she was invited as a Visiting Scientist at institute of inorganic Chemistry, University of Cologne, Germany in 2012 where she conducted research on Synthesis and characterization of new main group metal alkoxides as suitable Chemical Vapor Deposition precursors. She has 19 papers published in international journals and 15 papers presented in national and international conferences. She was also completed an international project entitled “Metal/ Hetero-metal Oxides Nanostructures for Marine Coatings: Synthesis and Characterization” funded by The Office of Naval Research Global (ONRG), Singapore.