The Experts below are selected from a list of 41532 Experts worldwide ranked by ideXlab platform
Yuri Kornyushin - One of the best experts on this subject based on the ideXlab platform.
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Uniform plasma oscillations in ellipsoid of Conductive Material
Facta Universitatis - Series: Physics Chemistry and Technology, 2004Co-Authors: Yuri KornyushinAbstract:The influence of the shape of a sample on the type of uniform dipole collective electrons oscillations is discussed. In samples of a bulk shape uniform bulk dipole oscillation (Langmuir oscillation) cannot exist. It exists in samples of a thin slab shape only. As uniform bulk dipole oscillations cannot penetrate ellipsoidal samples of Conductive Material they exist in the surface layer of a sample only (Mie oscillations). Frequencies of Mie oscillations are calculated for a sample of the shape of an arbitrary ellipsoid.
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UNIFORM PLASMA OSCILLATIONS IN ELLIPSOID OF Conductive Material UDC 533.92
2004Co-Authors: Yuri KornyushinAbstract:The influence of the shape of a sample on the type of uniform dipole collective electrons oscillations is discussed. In samples of a bulk shape uniform bulk dipole oscillation (Langmuir oscillation) cannot exist. It exists in samples of a thin slab shape only. As uniform bulk dipole oscillations cannot penetrate ellipsoidal samples of Conductive Material, they exist in the surface layer of a sample only (Mie oscillations). Frequencies of Mie oscillations are calculated for a sample of the shape of an arbitrary ellipsoid.
Jooheon Kim - One of the best experts on this subject based on the ideXlab platform.
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surface modification of bn fe3o4 hybrid particle to enhance interfacial affinity for high thermal Conductive Material
Polymer, 2016Co-Authors: Kiho Kim, Jooheon KimAbstract:Abstract A composite with high thermal conductivity was fabricated using anisotropic boron nitride (BN) and particle alignment techniques. Iron oxide nanoparticles introduced onto the BN surface acted as magnets that gave rise to effective particle alignment. Because of the weak interfacial affinity between filler and matrix, particles chipped during the process and the post-alignment composite had poor morphology. In order to enhance attraction at the interface, the particle surface was modified using a silane coupling agent and poly(tetramethylene glycol). The long carbon chain in the outer polymer layer became entangled with that of the epoxy matrix, resulting in enhancement of interfacial affinity and thermal conductivity. The thermal conductivity of the synthesized composite increased from 0.832 to 1.448 on 20 vol% of filler loading after particle orientation, and increased to 1.577 W/mK after polyol coating. These particle alignment and surface modifications suggest promising applications in the development of thermal interface Materials.
Chun-mei Yao - One of the best experts on this subject based on the ideXlab platform.
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First-principles prediction of a promising p-type transparent Conductive Material CsGeCl3
Applied Physics Express, 2014Co-Authors: Dan Huang, Yu-jun Zhao, Li-yong Gan, Xin-man Chen, Chun-mei Yao, Jin GuoAbstract:Most reported p-type transparent Conductive Materials are Cu-based compounds such as CuAlO2 and CuCrO2. Here, we report that compounds based on ns2 cations with low binding energy can also possess high valence band maximum, which is crucial for the p-type doping according to the doping limit rules. In particular, CsGeCl3, a compound with valence band maximum from ns2 cations, is predicted as a promising p-type transparent Conductive Material by first-principles calculations. Our results show that the p-type defect Ge vacancy dominates its intrinsic defects with a shallow transition level, and the calculated hole effective masses are low in CsGeCl3.
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First-principles study of Be doped CuAlS2 for p-type transparent Conductive Materials
Journal of Applied Physics, 2011Co-Authors: Dan Huang, Yu-jun Zhao, Ren-yu Tian, Di-hu Chen, Jian-jun Nie, Xin-hua Cai, Chun-mei YaoAbstract:CuAlS2 has attracted much attention recently as a p-type transparent Conductive Material. In this paper, we investigate the site preference of substitutional Be in CuAlS2 and the transition level of BeAl using the first-principles calculation. We find that Be would be doped effectively at Al sites in CuAlS2 as a good p-type dopant. In addition, we speculate that Be–Mg or Be–Zn codoped CuAlS2 could have a mobility enhancement and thus a good p-type conductivity due to low lattice distortion.
Dan Huang - One of the best experts on this subject based on the ideXlab platform.
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First-principles prediction of a promising p-type transparent Conductive Material CsGeCl3
Applied Physics Express, 2014Co-Authors: Dan Huang, Yu-jun Zhao, Li-yong Gan, Xin-man Chen, Chun-mei Yao, Jin GuoAbstract:Most reported p-type transparent Conductive Materials are Cu-based compounds such as CuAlO2 and CuCrO2. Here, we report that compounds based on ns2 cations with low binding energy can also possess high valence band maximum, which is crucial for the p-type doping according to the doping limit rules. In particular, CsGeCl3, a compound with valence band maximum from ns2 cations, is predicted as a promising p-type transparent Conductive Material by first-principles calculations. Our results show that the p-type defect Ge vacancy dominates its intrinsic defects with a shallow transition level, and the calculated hole effective masses are low in CsGeCl3.
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First-principles study of Be doped CuAlS2 for p-type transparent Conductive Materials
Journal of Applied Physics, 2011Co-Authors: Dan Huang, Yu-jun Zhao, Ren-yu Tian, Di-hu Chen, Jian-jun Nie, Xin-hua Cai, Chun-mei YaoAbstract:CuAlS2 has attracted much attention recently as a p-type transparent Conductive Material. In this paper, we investigate the site preference of substitutional Be in CuAlS2 and the transition level of BeAl using the first-principles calculation. We find that Be would be doped effectively at Al sites in CuAlS2 as a good p-type dopant. In addition, we speculate that Be–Mg or Be–Zn codoped CuAlS2 could have a mobility enhancement and thus a good p-type conductivity due to low lattice distortion.
Kiho Kim - One of the best experts on this subject based on the ideXlab platform.
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surface modification of bn fe3o4 hybrid particle to enhance interfacial affinity for high thermal Conductive Material
Polymer, 2016Co-Authors: Kiho Kim, Jooheon KimAbstract:Abstract A composite with high thermal conductivity was fabricated using anisotropic boron nitride (BN) and particle alignment techniques. Iron oxide nanoparticles introduced onto the BN surface acted as magnets that gave rise to effective particle alignment. Because of the weak interfacial affinity between filler and matrix, particles chipped during the process and the post-alignment composite had poor morphology. In order to enhance attraction at the interface, the particle surface was modified using a silane coupling agent and poly(tetramethylene glycol). The long carbon chain in the outer polymer layer became entangled with that of the epoxy matrix, resulting in enhancement of interfacial affinity and thermal conductivity. The thermal conductivity of the synthesized composite increased from 0.832 to 1.448 on 20 vol% of filler loading after particle orientation, and increased to 1.577 W/mK after polyol coating. These particle alignment and surface modifications suggest promising applications in the development of thermal interface Materials.