The Experts below are selected from a list of 219 Experts worldwide ranked by ideXlab platform
Kit H. Bowen - One of the best experts on this subject based on the ideXlab platform.
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Reactions of both aluminum hydride cluster anions and boron aluminum hydride cluster anions with oxygen : anionic products
International Journal of Mass Spectrometry, 2016Co-Authors: Xinxing Zhang, Haopeng Wang, Gerd Ganteför, Bryan W. Eichhorn, Kit H. BowenAbstract:Abstract The anionic products of reactions between aluminum hydride cluster anions and oxygen and between boron aluminum hydride cluster anions and oxygen were identified by mass spectrometry. While aluminum oxide anions dominated the products of both reactions, low intensities of hydrogen-containing aluminum oxide product anions were also observed in both cases. Surprisingly, in the reactions between boron aluminum hydride cluster anions and oxygen, there was scant evidence for boron-containing anionic products.
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Photoelectron spectroscopy of boron aluminum hydride cluster anions
Journal of Chemical Physics, 2014Co-Authors: Haopeng Wang, Xinxing Zhang, Kit H. Bowen, Yeon Jae Ko, Gerd Gantefoer, Xiang Li, Boggavarapu Kiran, Anil K. KandalamAbstract:Boron aluminum hydride clusters are studied through a synergetic combination of anion photoelectron spectroscopy and density functional theory based calculations. Boron aluminum hydride cluster anions, BxAlyHz−, were generated in a pulsed arc cluster ionization source and identified by time-of-flight mass spectrometry. After mass selection, their photoelectron spectra were measured by a magnetic bottle-type electron energy analyzer. The resultant photoelectron spectra as well as calculations on a selected series of stoichiometries reveal significant geometrical changes upon substitution of aluminum atoms by boron atoms.
Xinxing Zhang - One of the best experts on this subject based on the ideXlab platform.
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Reactions of both aluminum hydride cluster anions and boron aluminum hydride cluster anions with oxygen : anionic products
International Journal of Mass Spectrometry, 2016Co-Authors: Xinxing Zhang, Haopeng Wang, Gerd Ganteför, Bryan W. Eichhorn, Kit H. BowenAbstract:Abstract The anionic products of reactions between aluminum hydride cluster anions and oxygen and between boron aluminum hydride cluster anions and oxygen were identified by mass spectrometry. While aluminum oxide anions dominated the products of both reactions, low intensities of hydrogen-containing aluminum oxide product anions were also observed in both cases. Surprisingly, in the reactions between boron aluminum hydride cluster anions and oxygen, there was scant evidence for boron-containing anionic products.
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Photoelectron spectroscopy of boron aluminum hydride cluster anions
Journal of Chemical Physics, 2014Co-Authors: Haopeng Wang, Xinxing Zhang, Kit H. Bowen, Yeon Jae Ko, Gerd Gantefoer, Xiang Li, Boggavarapu Kiran, Anil K. KandalamAbstract:Boron aluminum hydride clusters are studied through a synergetic combination of anion photoelectron spectroscopy and density functional theory based calculations. Boron aluminum hydride cluster anions, BxAlyHz−, were generated in a pulsed arc cluster ionization source and identified by time-of-flight mass spectrometry. After mass selection, their photoelectron spectra were measured by a magnetic bottle-type electron energy analyzer. The resultant photoelectron spectra as well as calculations on a selected series of stoichiometries reveal significant geometrical changes upon substitution of aluminum atoms by boron atoms.
Haopeng Wang - One of the best experts on this subject based on the ideXlab platform.
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Reactions of both aluminum hydride cluster anions and boron aluminum hydride cluster anions with oxygen : anionic products
International Journal of Mass Spectrometry, 2016Co-Authors: Xinxing Zhang, Haopeng Wang, Gerd Ganteför, Bryan W. Eichhorn, Kit H. BowenAbstract:Abstract The anionic products of reactions between aluminum hydride cluster anions and oxygen and between boron aluminum hydride cluster anions and oxygen were identified by mass spectrometry. While aluminum oxide anions dominated the products of both reactions, low intensities of hydrogen-containing aluminum oxide product anions were also observed in both cases. Surprisingly, in the reactions between boron aluminum hydride cluster anions and oxygen, there was scant evidence for boron-containing anionic products.
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Photoelectron spectroscopy of boron aluminum hydride cluster anions
Journal of Chemical Physics, 2014Co-Authors: Haopeng Wang, Xinxing Zhang, Kit H. Bowen, Yeon Jae Ko, Gerd Gantefoer, Xiang Li, Boggavarapu Kiran, Anil K. KandalamAbstract:Boron aluminum hydride clusters are studied through a synergetic combination of anion photoelectron spectroscopy and density functional theory based calculations. Boron aluminum hydride cluster anions, BxAlyHz−, were generated in a pulsed arc cluster ionization source and identified by time-of-flight mass spectrometry. After mass selection, their photoelectron spectra were measured by a magnetic bottle-type electron energy analyzer. The resultant photoelectron spectra as well as calculations on a selected series of stoichiometries reveal significant geometrical changes upon substitution of aluminum atoms by boron atoms.
Kit Bowen - One of the best experts on this subject based on the ideXlab platform.
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The Oxidation Products of Aluminum Hydride and Boron Aluminum Hydride Clusters
2016Co-Authors: Kit BowenAbstract:Abstract : Reactions of both Aluminum Hydride Cluster Anions and Boron Aluminum Hydride Cluster Anions with Oxygen: Anionic Products. The anionic products of reactions between aluminum hydride cluster anions and oxygen and between boron aluminum hydride cluster anions and oxygen were identified by mass spectrometry. While aluminum oxide anions dominated the products of both reactions, low intensities of hydrogen-containing aluminum oxide product anions were also observed in both cases. Surprisingly, in the reactions between boron aluminum hydride cluster anions and oxygen, there was scant evidence for boron-containing anionic products
Hugh O Pierson - One of the best experts on this subject based on the ideXlab platform.
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Covalent Nitrides: Properties and General Characteristic
Handbook of Refractory Carbides and Nitrides, 1996Co-Authors: Hugh O PiersonAbstract:This chapter reveals the properties of covalent nitrides—boron nitride, aluminum nitrides, and silicon nitride—and provides a summary of the fabrication processes and applications of these compounds. The refractory covalent nitrides have remarkable properties and are industrial materials of major importance, produced on a large scale in the form of powders, monolithic shapes, and coatings. The three covalent nitrides are low-density materials with melting points, which are higher than those of their parent elements—boron, aluminum, and silicon. Of the three, boron nitride has the highest melting point and is more refractory than boron carbide. On the other hand, silicon nitride is not as refractory as silicon carbide. The thermal conductivity of the covalent nitrides decreases with increasing temperature. Thermal expansion of the covalent nitrides is low and, like that of the covalent carbides, increases with increasing temperature. This increase is not entirely linear and is slightly more rapid at high temperature. The covalent nitrides are excellent electrical insulators. Their electrons are strongly and covalently bonded to the nucleus and are not available for metallic bonding.
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Covalent Nitrides: Composition and Structure
Handbook of Refractory Carbides and Nitrides, 1996Co-Authors: Hugh O PiersonAbstract:This chapter reviews the composition and structure of covalent nitrides including boron nitride, aluminum nitride, and silicon nitride. The three covalent nitrides have some common features like they fully meet the refractory criteria of high melting point and thermal and chemical stability; they have similar cubic structures; their electronic bonding is mainly covalent; they have low density; their elemental constituents have low atomic weight; they are good electrical insulators; they are hard and strong materials and exhibit typical ceramic characteristics; and they are produced industrially with important applications. Covalent nitrides have a relatively simple crystal structure and an atomic bonding that is less complex than the interstitial nitrides. The bonding is mostly covalent by the sharing of electrons and is achieved by the hybridization of the respective electron orbitals. Boron nitride (BN) is the only major compound known in the boron-nitrogen system and aluminum nitride (AlN) is the only major compound known in the aluminum-nitrogen system.
