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Solid state sciences v.64, 2017년, pp.91 - 98   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Compressibility and structural behavior of pure and Fe-doped SnO2 nanocrystals

Grinblat, F. (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 ) ; Ferrari, S. (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 ) ; Pampillo, L.G. (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 ) ; Saccone, F.D. (Universidad de Buenos Aires, Departamento de Física, Facultad de Ingeniería, Av. Paseo Colón 850, 1063, Buenos Aires, Argentina ) ; Errandonea, D. (Departamento de Físi ) ; Santamaria-Perez, D. ; Segura, A. ; Vilaplana, R. ; Popescu, C. ;
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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 ( P4 2 /mnm ) to an orthorhombic CaCl 2 -type structure (space group Pnnm ). No phase coexistence was observed for this transition. Additionally, pure SnO 2 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 SnO 2 . Results are compared with previous studies on bulk and nanocrystalline SnO 2 . The effects of pressure on Sn-O bonds are also analyzed. Highlights HP-XRD experiments were performed on 30 nm SnO 2 and 18 nm Fe 0.1 Sn 0.9 O 2 . In both samples at 13 GPa a second-order rutile-to-orthorhombic transition is found. No phase coexistence was observed for the rutile-to-orthorhombic phase transition. Pure SnO 2 nanoparticles presents a phase transition to a cubic structure at 24 GPa. Fe-doped SnO 2 is less compressible than pure SnO 2 . Graphical abstract [DISPLAY OMISSION]


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