Sol- gel synthesis of Ga2O3 nanorods and effect of precursor chemistry on their structural and morphological properties |
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Authors: | Ram Gopal Ankit Goyal Ajay Saini Meena Nagar Nikita Sharma Deepak Kumar Gupta Veena Dhayal |
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Affiliation: | 1. Department of Chemistry, University of Rajasthan, Jaipur 302004, India;2. Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology, Jaipur 302017 India;3. Department of Chemistry, Government Girls College, Chomu, Jaipur, Rajasthan, India;4. Center For Converging Technologies, Rajasthan University, Jaipur 302004, India;5. Department of Chemistry, Manipal University Jaipur, Jaipur 303007, India |
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Abstract: | Synthesis of mono-crystalline Ga2O3 Nanorods was done by sol-gel transformation of gallium(III) isopropoxide (Ga(OPri)3). XRD studies were done to determine the planes and crystal structure of synthesized nanorods that showed the synthesis of β-Ga2O3(a). TEM studies of synthesized Ga2O3 confirmed the synthesis of monocrystalline β-Ga2O3 nanorods. To study the effect of precursor chemistry and to determine role of precursor structures on the crystal structure, phase and morphology of the Ga2O3, a new modified precursor complex was synthesized. The reaction of Ga(OPri)3 with N-phenylsalicylaldimine, C6H4(OH)CH=N(C6H5)] in 1:1?M ratio yielded {(H5C6)N?=?CH-C6H4O}Ga(OPri)2]. The newly synthesized complex was characterized by elemental analyses, molecular weight measurement, FT-IR and NMR (1H and 13C) spectral studies. Spectral studies of the modified complex suggest the presence of bi-dentate mode of attachment of Schiff's base in the solution state. Sol-gel transformations of {(H5C6)N?=?CH-C6H4O}Ga(OPri)2] in organic medium, yielded γ-Ga2O3(b), as found by XRD studies. TEM image of the sample (a) revealed the formation of nano-rods of oxide with average diameter of ~100?nm whereas the TEM image of sample (b) showed presence of nano-sized particles of oxide with average particle size of 10?nm. Morphological and compositional studies of synthesized samples (a) and (b) were carried out using SEM and EDX. The method provides a possibility of large scale synthesis of dissimilar shaped and pure Ga2O3 nanoparticles. |
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Keywords: | Sol-gel process Electron microscopy Nano-rods |
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