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I W Martin - One of the best experts on this subject based on the ideXlab platform.
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order within disorder the Atomic structure of ion beam sputtered amorphous tantala a ta2o5
APL Materials, 2015Co-Authors: R Bassiri, Franklin Liou, Matthew Abernathy, Apurva Mehta, Badri Shyam, R L Byer, E K Gustafson, M J Hart, Ian Maclaren, I W MartinAbstract:Amorphous tantala (a-Ta2O5) is a technologically important material often used in high-performance coatings. Understanding this material at the Atomic level provides a way to further improve performance. This work details extended X-ray absorption fine structure measurements of a-Ta2O5 coatings, where high-quality experimental data and theoretical fits have allowed a detailed interpretation of the nearest-neighbor distributions. It was found that the Tantalum Atom is surrounded by four shells of Atoms in sequence; oxygen, Tantalum, oxygen, and Tantalum. A discussion is also included on how these models can be interpreted within the context of published crystalline Ta 2O5 and other a-T2O5 studies.
R Bassiri - One of the best experts on this subject based on the ideXlab platform.
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order within disorder the Atomic structure of ion beam sputtered amorphous tantala a ta2o5
APL Materials, 2015Co-Authors: R Bassiri, Franklin Liou, Matthew Abernathy, Apurva Mehta, Badri Shyam, R L Byer, E K Gustafson, M J Hart, Ian Maclaren, I W MartinAbstract:Amorphous tantala (a-Ta2O5) is a technologically important material often used in high-performance coatings. Understanding this material at the Atomic level provides a way to further improve performance. This work details extended X-ray absorption fine structure measurements of a-Ta2O5 coatings, where high-quality experimental data and theoretical fits have allowed a detailed interpretation of the nearest-neighbor distributions. It was found that the Tantalum Atom is surrounded by four shells of Atoms in sequence; oxygen, Tantalum, oxygen, and Tantalum. A discussion is also included on how these models can be interpreted within the context of published crystalline Ta 2O5 and other a-T2O5 studies.
Carlos A Murillo - One of the best experts on this subject based on the ideXlab platform.
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metal assisted unorthodox reactions of formamidines coupling cleavage and insertions
Polyhedron, 1997Co-Authors: Albert F Cotton, Lee M Daniels, John H Matonic, Xiaoping Wang, Carlos A MurilloAbstract:Abstract The purpose of this report is to call attention to the wide range of reactions that an amidine or amidinium may undergo in the presence of reduced metal ions, other than simple ligation of the metal ions. Crystal structures of five examples are presented. In (ηdmpm)Cl2Ta(μ-NTol)(μ-η2-HC=NTol)(μ-dmpm)taCl(n2DtolF) (I), both fragments from a CN bond cleavage of the di-p-toloformamidinate anion, DTolF−, namely tolylimido and tolylformomidoyl groups, are found forming bridges between the metal Atoms. An amido group is also found in TaCl2(NPh)(DPhF)(HDPhF) (II), in which a six-coordinated Tantalum Atom is surrounded also by two chlorine Atoms, a chelating diphenylformamidinate, DPhF− and a neutral HDPhF molecule. A new neutral chelating ligand forms during the synthesis of CoCl2(PhNCHNPhCHNPh) (III), in which the divalent cobalt Atom is in a pseudo-tetrahedral environment. The six-membered metallocycle formed by the C–N–C–N–C–N Atoms is essentially planar. Reaction of K with crude Ta2(μ2-η4-B2H6)(μ-DTolF)4 produces [(B2H5)N(Tol)C(H)N(Tol)]Ta(μ2-NTol)2(μ2-DTolF)2Ta[(Tol)NC(H)N(Tol)B2H5] · 2Et2O (IV), in which a diTantalum unit is bridged by two DTolF and two tolylimido groups. A new ligand formed by fusion of a B2H5− unit to a DTolF− anion chelates to each of the metal Atoms. In the crystals, 50% of the B2H5 moieties are BH3 groups. Coupling of two DPhF anions is observed in PhNC(H)N(Ph)C(H) (NPh)2Ta(DPhF)3·Et2O (V). The new dianion chelates the metal center, to which three other DPhF groups are attached giving an eight-coordinated compound.
Ian Maclaren - One of the best experts on this subject based on the ideXlab platform.
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order within disorder the Atomic structure of ion beam sputtered amorphous tantala a ta2o5
APL Materials, 2015Co-Authors: R Bassiri, Franklin Liou, Matthew Abernathy, Apurva Mehta, Badri Shyam, R L Byer, E K Gustafson, M J Hart, Ian Maclaren, I W MartinAbstract:Amorphous tantala (a-Ta2O5) is a technologically important material often used in high-performance coatings. Understanding this material at the Atomic level provides a way to further improve performance. This work details extended X-ray absorption fine structure measurements of a-Ta2O5 coatings, where high-quality experimental data and theoretical fits have allowed a detailed interpretation of the nearest-neighbor distributions. It was found that the Tantalum Atom is surrounded by four shells of Atoms in sequence; oxygen, Tantalum, oxygen, and Tantalum. A discussion is also included on how these models can be interpreted within the context of published crystalline Ta 2O5 and other a-T2O5 studies.
M J Hart - One of the best experts on this subject based on the ideXlab platform.
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order within disorder the Atomic structure of ion beam sputtered amorphous tantala a ta2o5
APL Materials, 2015Co-Authors: R Bassiri, Franklin Liou, Matthew Abernathy, Apurva Mehta, Badri Shyam, R L Byer, E K Gustafson, M J Hart, Ian Maclaren, I W MartinAbstract:Amorphous tantala (a-Ta2O5) is a technologically important material often used in high-performance coatings. Understanding this material at the Atomic level provides a way to further improve performance. This work details extended X-ray absorption fine structure measurements of a-Ta2O5 coatings, where high-quality experimental data and theoretical fits have allowed a detailed interpretation of the nearest-neighbor distributions. It was found that the Tantalum Atom is surrounded by four shells of Atoms in sequence; oxygen, Tantalum, oxygen, and Tantalum. A discussion is also included on how these models can be interpreted within the context of published crystalline Ta 2O5 and other a-T2O5 studies.