Compressibility and structural behavior of pure and Fe-doped SnO2 nanocrystals |
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| Institution: | 1. Universidad de Buenos Aires, Consejo Nacional de lnvestigaciones Científicas y Técnicas, Instituto de Tecnología y Ciencias de la Ingeniería “Ing. Hilario Fernandez Long” (INTECIN), Av. Paseo Colón 850, 1063, Buenos Aires, Argentina;2. Universidad de Buenos Aires, Departamento de Física, Facultad de Ingeniería, Av. Paseo Colón 850, 1063, Buenos Aires, Argentina;3. Departamento de Física Aplicada, Institut Universitari de Ciència dels Materials, Universitat de Valencia, c/Doctor Moliner 50, E-46100, Burjassot, Valencia, Spain;4. Centro de Tecnologías Físicas, Universitat Politècnica de València, Valencia, Spain;5. ALBA-CELLS, Cerdanyola, Spain;1. Centre for Nanomaterials Research, Institute of Science, Level 3 Block C, Old Engineering Building, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia;2. School of Physics and Materials Studies, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia;3. School of Chemistry and Environment, Faculty of Applied Sciences, Universiti Teknologi MARA, 40450, Shah Alam, Selangor, Malaysia;1. Laboratoire de Physique Appliquée, Faculté des Sciences, B.P. 1171, 3000, Sfax, Université de Sfax, Tunisia;2. Institut Préparatoire aux Études d''Ingénieur de Sfax, BP 1172, 3018, Sfax, Université de Sfax, Tunisia;3. Institut Néel, CNRS Université J. Fourier, BP166, 38042, Grenoble, France;1. Department of Physics, College of Science, King Faisal University, P.O Box 400, Hofuf, Al-Ahsa 31982, Saudi Arabia;2. Department of Physics, BanasthaliVidyapith, Banasthali, 304022, Rajasthan, India;3. Department of Physics, Ibb University, Ibb, Yemen;4. Advanced Analysis Center, Korea Institute of Science and Technology, Seoul 136-791, Republic of Korea;5. University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, New Delhi, 110078, India;6. Department of Pure & Applied Physics, University of Kota, Kota, 324005, Rajasthan, India;7. Electronic Materials & Nanomagnetism Lab, Department of Applied Physics, Amity School of Applied Sciences, Amity University Haryana, Gurgaon, 122413, India;1. University School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, New Delhi 110078, India;2. Inter University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067, India;3. National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan |
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| Abstract: | We have performed high-pressure synchrotron X-ray diffraction experiments on nanoparticles of pure tin dioxide (particle size ∼30 nm) and 10 mol % Fe-doped tin dioxide (particle size ∼18 nm). The structural behavior of undoped tin dioxide nanoparticles has been studied up to 32 GPa, while the Fe-doped tin dioxide nanoparticles have been studied only up to 19 GPa. We have found that both samples present at ∼13 GPa a second-order structural phase transition from the ambient pressure tetragonal rutile-type structure (P42/mnm) to an orthorhombic CaCl2-type structure (space group Pnnm). No phase coexistence was observed for this transition. Additionally, pure SnO2 presents a phase transition to a cubic structure at ∼24 GPa. The evolution of the lattice parameters with pressure and the room-temperature equations of state are reported for the different phases. The reported results suggest that the partial substitution of Sn by Fe induces an enhancement of the bulk modulus of SnO2. Results are compared with previous studies on bulk and nanocrystalline SnO2. The effects of pressure on Sn-O bonds are also analyzed. |
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