The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Yuri Svirko - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear refraction in semitransparent pyrolytic Carbon Films
Optical Materials Express, 2012Co-Authors: Tommi Kaplas, Lasse Karvonen, John Rönn, Muhammad Saleem, Sami Kujala, Seppo Honkanen, Yuri SvirkoAbstract:We report on Z–scan measurements of the nonlinear refractive index of semitransparent pyrolytic Carbon Films. The nonlinear refractive index of the film is as high as 8.23 × 10−9 cm2/W and shows a non–monotonous dependence on the film thickness. We demonstrate that, although the linear absorption coefficient of the pyrolytic Carbon Films is comparable to that of crystalline graphite, the nonlinear absorption coefficient of the Films is much lower than that of graphene.
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direct deposition of semitransparent conducting pyrolytic Carbon Films
Journal of Nanophotonics, 2012Co-Authors: Tommi Kaplas, Yuri SvirkoAbstract:Ultrathin pyrolytic Carbon Films were synthesized in a single step on dielectric substrates, using a methane-based chemical vapor deposition technique. The developed technique enables the production of wafer scale transparent conductive Films suitable for applications in optics and optoelectronics.
Huixing Zhang - One of the best experts on this subject based on the ideXlab platform.
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Structure and properties of tetrahedral amorphous Carbon Films implanted with Ti ion
Surface and Coatings Technology, 2007Co-Authors: Xu Zhang, Lizhao Qin, Huixing ZhangAbstract:In this paper the structures, mechanical properties and tribological characterization of the tetrahedral amorphous Carbon Films implanted with Ti ion with energy range from 2 keV to 12 keV using MEVVA implantation have been investigated. The structures of the Ti containing amorphous Carbon film have been studied by X-ray photoelectron spectroscopes. The tetrahedral amorphous Carbon transform to sp2-rich amorphous Carbon during Ti ion implantation. The hardness and elastic modulus of the tetrahedral amorphous Carbon Films decreases with Ti ion implantation as a result of graphitization of sp3-rich amorphous Carbon film. The compressive stress of tetrahedral amorphous Carbon Films implanted with Ti decreases with increase of ion implantation dose and energy. The friction coefficient of tetrahedral amorphous Carbon film implanted with Ti increases with implantation dosage.
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Structure and wear resistance of tetrahedral amorphous Carbon Films
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003Co-Authors: Xu Zhang, Huixing Zhang, Tonghe Zhang, Xiaoji Zhang, Jimei SangAbstract:Abstract High quality tetrahedral amorphous Carbon Films (ta-C) have been prepared on silicon and M2 steel substrate by filtered cathodic vacuum arc deposition. The structures, mechanical properties, adhesion and wear resistance of the tetrahedral amorphous Carbon Films have been investigated. The hardness and elastic modulus of the tetrahedral amorphous Carbon Films are determined by nano-indentation tests. The results show that the hardness and elastic modulus of the tetrahedral amorphous Carbon Films are 79 and 431 GPa, respectively. The friction performance of the tetrahedral amorphous Carbon Films was also studied. The coefficient of tetrahedral amorphous Carbon film on substrate of M2 steel is 0.20, and stable up to 2500 cycles and the wear rate of tetrahedral amorphous Carbon film is 1.233 × 10 −8 mm 3 /N m for an applied load of 5 N and 2500 cycles.
Xu Zhang - One of the best experts on this subject based on the ideXlab platform.
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Structure and properties of tetrahedral amorphous Carbon Films implanted with Ti ion
Surface and Coatings Technology, 2007Co-Authors: Xu Zhang, Lizhao Qin, Huixing ZhangAbstract:In this paper the structures, mechanical properties and tribological characterization of the tetrahedral amorphous Carbon Films implanted with Ti ion with energy range from 2 keV to 12 keV using MEVVA implantation have been investigated. The structures of the Ti containing amorphous Carbon film have been studied by X-ray photoelectron spectroscopes. The tetrahedral amorphous Carbon transform to sp2-rich amorphous Carbon during Ti ion implantation. The hardness and elastic modulus of the tetrahedral amorphous Carbon Films decreases with Ti ion implantation as a result of graphitization of sp3-rich amorphous Carbon film. The compressive stress of tetrahedral amorphous Carbon Films implanted with Ti decreases with increase of ion implantation dose and energy. The friction coefficient of tetrahedral amorphous Carbon film implanted with Ti increases with implantation dosage.
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Structure and wear resistance of tetrahedral amorphous Carbon Films
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003Co-Authors: Xu Zhang, Huixing Zhang, Tonghe Zhang, Xiaoji Zhang, Jimei SangAbstract:Abstract High quality tetrahedral amorphous Carbon Films (ta-C) have been prepared on silicon and M2 steel substrate by filtered cathodic vacuum arc deposition. The structures, mechanical properties, adhesion and wear resistance of the tetrahedral amorphous Carbon Films have been investigated. The hardness and elastic modulus of the tetrahedral amorphous Carbon Films are determined by nano-indentation tests. The results show that the hardness and elastic modulus of the tetrahedral amorphous Carbon Films are 79 and 431 GPa, respectively. The friction performance of the tetrahedral amorphous Carbon Films was also studied. The coefficient of tetrahedral amorphous Carbon film on substrate of M2 steel is 0.20, and stable up to 2500 cycles and the wear rate of tetrahedral amorphous Carbon film is 1.233 × 10 −8 mm 3 /N m for an applied load of 5 N and 2500 cycles.
William I. Milne - One of the best experts on this subject based on the ideXlab platform.
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Nanocrystallites in tetrahedral amorphous Carbon Films
Applied Physics Letters, 1996Co-Authors: S. Ravi, P. Silva, B. X. Tay, H.s. Tan, William I. MilneAbstract:The microstructure of filtered cathodic vacuum arc deposited tetrahedral amorphous Carbon Films is studied as a function of ion energy. An optimum energy window in the density and C–C sp3 content at an ion energy of ∼90 eV observed in this study. It is shown that the density of the amorphous Carbon Films are closely related to the sp3 content. The observation of nanocrystals embedded in the amorphous Carbon matrix is reported. Most of the crystals observed by transmission electron microscopy can be indexed to graphite, but some of the crystals can be indexed to cubic diamond. The chemical composition of the crystals is analyzed using electron energy loss spectroscopy (EELS). The only discernible EELS edge is that of C at an energy of 285 eV.
Tommi Kaplas - One of the best experts on this subject based on the ideXlab platform.
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Nonlinear refraction in semitransparent pyrolytic Carbon Films
Optical Materials Express, 2012Co-Authors: Tommi Kaplas, Lasse Karvonen, John Rönn, Muhammad Saleem, Sami Kujala, Seppo Honkanen, Yuri SvirkoAbstract:We report on Z–scan measurements of the nonlinear refractive index of semitransparent pyrolytic Carbon Films. The nonlinear refractive index of the film is as high as 8.23 × 10−9 cm2/W and shows a non–monotonous dependence on the film thickness. We demonstrate that, although the linear absorption coefficient of the pyrolytic Carbon Films is comparable to that of crystalline graphite, the nonlinear absorption coefficient of the Films is much lower than that of graphene.
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direct deposition of semitransparent conducting pyrolytic Carbon Films
Journal of Nanophotonics, 2012Co-Authors: Tommi Kaplas, Yuri SvirkoAbstract:Ultrathin pyrolytic Carbon Films were synthesized in a single step on dielectric substrates, using a methane-based chemical vapor deposition technique. The developed technique enables the production of wafer scale transparent conductive Films suitable for applications in optics and optoelectronics.