title: Effect of sintering temperature on structural and optical properties of indium(III) oxide nanoparticles prepared with Triton X-100 by hydrothermal method.
abstract: Indium(III) hydroxide (In(OH)3) powders prepared via Triton X-100 mediated hydrothermal method was sintered at different temperatures (400, 500 and 600°C) to yield indium(III) oxide nanoparticles (In2O3 NPs). Thermal studies of In(OH)3 confirmed complete conversion to In2O3 around 400°C. Powder X-ray diffraction (XRD) pattern of sintered In2O3 nanoparticles revealed the formation of phase pure cubic In2O3. The crystallite size of In2O3 NPs was increased from 12 to 26nm upon increasing the sintering temperature from 400°C to 600°C, while the percentage crystallinity was increased up to 90% after sintering at 600°C. A red shift in the band gap energy was observed with increasing sintering temperature due to the larger size of sintered In2O3 NPs. Room temperature photoluminescence spectra of the indium oxide nanoparticles showed both near band and excitonic emission of In2O3 due to oxygen vacancies.
authors: Defence Bioengineering and Electromedical Laboratory, Bangalore 560 093, India; Inorganic & Nanomaterials Research Laboratory, Department of Chemistry, Bharathiar University, Coimbatore 641 046, India.
authors: D
authors: D
authors: Selvakumar
authors: Inorganic & Nanomaterials Research Laboratory, Department of Chemistry, Bharathiar University, Coimbatore 641 046, India. Electronic address: dharmaraj@buc.edu.in.
authors: N
authors: N
authors: Dharmaraj
authors: DRDO-BU Center for Life Sciences, Bharathiar University, Coimbatore 641 046, India.
authors: K
authors: K
authors: Kadirvelu
authors: Defence Bioengineering and Electromedical Laboratory, Bangalore 560 093, India.
authors: N S
authors: NS
authors: Kumar
authors: Defence Bioengineering and Electromedical Laboratory, Bangalore 560 093, India.
authors: V C
authors: VC
authors: Padaki
mesh_terms: D007204:Indium / Q000737:chemistry*; D049449:Luminescence; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D017830:Octoxynol / Q000737:chemistry*; D010316:Particle Size; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D007204:Indium; C047711:indium oxide; D017830:Octoxynol
keywords: FT-IR; Hydrothermal method; Indium(III) oxide nanoparticles; Photoluminescence; Triton X-100; UV–visible