The Experts below are selected from a list of 40299 Experts worldwide ranked by ideXlab platform
Yusuke Yamauchi - One of the best experts on this subject based on the ideXlab platform.
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coalescence driven verticality in mesoporous tio2 thin films with Long Range Ordering
Journal of the American Chemical Society, 2020Co-Authors: Victor Malgras, Yasuhiro Shirai, Toshiaki Takei, Yusuke YamauchiAbstract:Mesoporous semiconducting films with continuous interconnectivity and minimal tortuosity, such as densely ordered arrays of vertical channels, are ideal for ensuring a maximal surface area at the heterojunction to increase the density of charges or photons. While the design of these films with nanostructures below 50 nm using modern lithography is not feasible, continuously perpendicular pores can be obtained throughout a TiO2 film using a traditional soft-templating approach and lyotropic crystal engineering. We demonstrate here that a polystyrene-b-poly(ethylene oxide) block copolymer in a three-solvent system can self-assemble into a body-centered cubic Im3m template. The Long-Range three-dimensional periodicity of the template combined with a high degree of vertical contraction results in coalescence of the pores into orthogonal channels that are strongly interconnected with their nearest neighbors in the (011) plane. This work presents evidence of lateral Long-Range Ordering with continuously transverse vertical porosity in a TiO2 material, which will enable functional applications, such as filtration, sensing, catalysis, and optoelectronics. To this end, we demonstrate the ability of the films to template and host methylammonium lead iodide perovskite nanocrystals.
Takao Mori - One of the best experts on this subject based on the ideXlab platform.
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Anisotropic thermal transport in magnetic intercalates FexTiS2
Physical Review B, 2019Co-Authors: Florent Pawula, Sylvie Hébert, Alaska Subedi, Naoyuki Kawamoto, Yohei Kakefuda, Antoine Maignan, Oleg I Lebedev, Tetsuya Baba, Ramzy Daou, Takao MoriAbstract:We present a study of the of thermal transport in thin single crystals of iron-intercalated titanium disulphide, Fe$_{x}$TiS$_2$ for $0\leq x \leq 0.20$. We determine the distribution of intercalants using high-resolution crystallographic and magnetic measurements, confirming the insertion of Fe without Long-Range Ordering. We find that iron intercalation perturbs the lattice very little, and suppresses the tendency of TiS$_2$ to self-intercalate with excess Ti. We observe trends in the thermal conductivity that are compatible with our ab initio calculations of thermal transport in perfectly stoichiometric TiS$_2$.
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anisotropic thermal transport in magnetic intercalates fe x tis 2
Physical Review B, 2019Co-Authors: Florent Pawula, Sylvie Hébert, Alaska Subedi, Naoyuki Kawamoto, Yohei Kakefuda, Antoine Maignan, Oleg I Lebedev, Tetsuya Baba, Ramzy Daou, Takao MoriAbstract:We present a study of the of thermal transport in thin single crystals of iron-intercalated titanium disulphide, Fe$_{x}$TiS$_2$ for $0\leq x \leq 0.20$. We determine the distribution of intercalants using high-resolution crystallographic and magnetic measurements, confirming the insertion of Fe without Long-Range Ordering. We find that iron intercalation perturbs the lattice very little, and suppresses the tendency of TiS$_2$ to self-intercalate with excess Ti. We observe trends in the thermal conductivity that are compatible with our ab initio calculations of thermal transport in perfectly stoichiometric TiS$_2$.
Maarit Karppinen - One of the best experts on this subject based on the ideXlab platform.
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Magnetic properties and B-site cation Ordering in (Sr0.5Ba0.5)2FeSbO6 perovskite
Journal of Alloys and Compounds, 2018Co-Authors: T. Tiittanen, Maarit KarppinenAbstract:Abstract We investigate the dependence of magnetic properties on the B-site cation Ordering for a series of (Sr0.5Ba0.5)2FeSbO6 double-perovskite samples for which the Fe/Sb Long-Range Ordering Ranges from nearly nonexisting to essentially complete. Also the size of crystallographically ordered domains varies among the samples. All the samples are antiferromagnetic at low temperatures independent of the level of Ordering, indicating multiple co-existing exchange and/or superexchange interactions. Nevertheless, a clear trend is seen for the Neel temperature and the effective magnetic moment both increasing with increasing degree of order and the size of the ordered domains.
Florent Pawula - One of the best experts on this subject based on the ideXlab platform.
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Anisotropic thermal transport in magnetic intercalates FexTiS2
Physical Review B, 2019Co-Authors: Florent Pawula, Sylvie Hébert, Alaska Subedi, Naoyuki Kawamoto, Yohei Kakefuda, Antoine Maignan, Oleg I Lebedev, Tetsuya Baba, Ramzy Daou, Takao MoriAbstract:We present a study of the of thermal transport in thin single crystals of iron-intercalated titanium disulphide, Fe$_{x}$TiS$_2$ for $0\leq x \leq 0.20$. We determine the distribution of intercalants using high-resolution crystallographic and magnetic measurements, confirming the insertion of Fe without Long-Range Ordering. We find that iron intercalation perturbs the lattice very little, and suppresses the tendency of TiS$_2$ to self-intercalate with excess Ti. We observe trends in the thermal conductivity that are compatible with our ab initio calculations of thermal transport in perfectly stoichiometric TiS$_2$.
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anisotropic thermal transport in magnetic intercalates fe x tis 2
Physical Review B, 2019Co-Authors: Florent Pawula, Sylvie Hébert, Alaska Subedi, Naoyuki Kawamoto, Yohei Kakefuda, Antoine Maignan, Oleg I Lebedev, Tetsuya Baba, Ramzy Daou, Takao MoriAbstract:We present a study of the of thermal transport in thin single crystals of iron-intercalated titanium disulphide, Fe$_{x}$TiS$_2$ for $0\leq x \leq 0.20$. We determine the distribution of intercalants using high-resolution crystallographic and magnetic measurements, confirming the insertion of Fe without Long-Range Ordering. We find that iron intercalation perturbs the lattice very little, and suppresses the tendency of TiS$_2$ to self-intercalate with excess Ti. We observe trends in the thermal conductivity that are compatible with our ab initio calculations of thermal transport in perfectly stoichiometric TiS$_2$.
T. Tiittanen - One of the best experts on this subject based on the ideXlab platform.
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Magnetic properties and B-site cation Ordering in (Sr0.5Ba0.5)2FeSbO6 perovskite
Journal of Alloys and Compounds, 2018Co-Authors: T. Tiittanen, Maarit KarppinenAbstract:Abstract We investigate the dependence of magnetic properties on the B-site cation Ordering for a series of (Sr0.5Ba0.5)2FeSbO6 double-perovskite samples for which the Fe/Sb Long-Range Ordering Ranges from nearly nonexisting to essentially complete. Also the size of crystallographically ordered domains varies among the samples. All the samples are antiferromagnetic at low temperatures independent of the level of Ordering, indicating multiple co-existing exchange and/or superexchange interactions. Nevertheless, a clear trend is seen for the Neel temperature and the effective magnetic moment both increasing with increasing degree of order and the size of the ordered domains.
