The Experts below are selected from a list of 24231 Experts worldwide ranked by ideXlab platform
D. Fournier - One of the best experts on this subject based on the ideXlab platform.
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Thermal Insulating Layer on a conducting substrate. Analysis of thermoreflectance experiments
Journal of Applied Physics, 2012Co-Authors: Christian Frétigny, Jean-yves Duquesne, D. FournierAbstract:Thermoreflectance experiments are sensitive to the thermal properties of thin Layers deposited on substrates (conductivity and diffusivity). However, retrieving these properties from experimental data remains a difficult issue. The case of a conducting Layer deposited on an Insulating substrate was studied previously. We present here a mathematical and experimental analysis of the thermoreflectance response in the opposite case: an Insulating Layer on a conducting substrate. We show theoretically that conductivity and diffusivity can be determined independently thanks to a comparison with the substrate. The method is applied to experiments performed on a silicon substrate covered with a thin Layer deposited by sputtering a titanium target.
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Thermal Insulating Layer on a conducting substrate. Analysis of thermoreflectance experiments
Journal of Applied Physics, 2012Co-Authors: Christian Frétigny, Jean-yves Duquesne, D. FournierAbstract:Thermoreflectance experiments are sensitive to the thermal properties of thin Layers deposited on substrates (conductivity and diffusivity). However, retrieving these properties from experimental data remains a difficult issue. The case of a conducting Layer deposited on an Insulating substrate was studied previously. We present here a mathematical and experimental analysis of the thermoreflectance response in the opposite case: an Insulating Layer on a conducting substrate. We show theoretically that conductivity and diffusivity can be determined independently thanks to a comparison with the substrate. The method is applied to experiments performed on a silicon substrate covered with a thin Layer deposited by sputtering a titanium target. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3702823]
Christian Frétigny - One of the best experts on this subject based on the ideXlab platform.
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Thermal Insulating Layer on a conducting substrate. Analysis of thermoreflectance experiments
Journal of Applied Physics, 2012Co-Authors: Christian Frétigny, Jean-yves Duquesne, D. FournierAbstract:Thermoreflectance experiments are sensitive to the thermal properties of thin Layers deposited on substrates (conductivity and diffusivity). However, retrieving these properties from experimental data remains a difficult issue. The case of a conducting Layer deposited on an Insulating substrate was studied previously. We present here a mathematical and experimental analysis of the thermoreflectance response in the opposite case: an Insulating Layer on a conducting substrate. We show theoretically that conductivity and diffusivity can be determined independently thanks to a comparison with the substrate. The method is applied to experiments performed on a silicon substrate covered with a thin Layer deposited by sputtering a titanium target.
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Thermal Insulating Layer on a conducting substrate. Analysis of thermoreflectance experiments
Journal of Applied Physics, 2012Co-Authors: Christian Frétigny, Jean-yves Duquesne, D. FournierAbstract:Thermoreflectance experiments are sensitive to the thermal properties of thin Layers deposited on substrates (conductivity and diffusivity). However, retrieving these properties from experimental data remains a difficult issue. The case of a conducting Layer deposited on an Insulating substrate was studied previously. We present here a mathematical and experimental analysis of the thermoreflectance response in the opposite case: an Insulating Layer on a conducting substrate. We show theoretically that conductivity and diffusivity can be determined independently thanks to a comparison with the substrate. The method is applied to experiments performed on a silicon substrate covered with a thin Layer deposited by sputtering a titanium target. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3702823]
Jean-yves Duquesne - One of the best experts on this subject based on the ideXlab platform.
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Thermal Insulating Layer on a conducting substrate. Analysis of thermoreflectance experiments
Journal of Applied Physics, 2012Co-Authors: Christian Frétigny, Jean-yves Duquesne, D. FournierAbstract:Thermoreflectance experiments are sensitive to the thermal properties of thin Layers deposited on substrates (conductivity and diffusivity). However, retrieving these properties from experimental data remains a difficult issue. The case of a conducting Layer deposited on an Insulating substrate was studied previously. We present here a mathematical and experimental analysis of the thermoreflectance response in the opposite case: an Insulating Layer on a conducting substrate. We show theoretically that conductivity and diffusivity can be determined independently thanks to a comparison with the substrate. The method is applied to experiments performed on a silicon substrate covered with a thin Layer deposited by sputtering a titanium target.
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Thermal Insulating Layer on a conducting substrate. Analysis of thermoreflectance experiments
Journal of Applied Physics, 2012Co-Authors: Christian Frétigny, Jean-yves Duquesne, D. FournierAbstract:Thermoreflectance experiments are sensitive to the thermal properties of thin Layers deposited on substrates (conductivity and diffusivity). However, retrieving these properties from experimental data remains a difficult issue. The case of a conducting Layer deposited on an Insulating substrate was studied previously. We present here a mathematical and experimental analysis of the thermoreflectance response in the opposite case: an Insulating Layer on a conducting substrate. We show theoretically that conductivity and diffusivity can be determined independently thanks to a comparison with the substrate. The method is applied to experiments performed on a silicon substrate covered with a thin Layer deposited by sputtering a titanium target. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3702823]
Philippe Hapiot - One of the best experts on this subject based on the ideXlab platform.
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Tunneling Dendrimers. Enhancing Charge Transport through Insulating Layer Using Redox Molecular Objects
Journal of the American Chemical Society, 2015Co-Authors: Sebastien Lhenry, Joanna Jalkh, Leroux Yann, Roberto Ciganda, Dominique Astruc, Jaime Ruiz, Philippe HapiotAbstract:Charge transport through an Insulating Layer was probed using ferrocenyl-terminated dendrimers and scanning electrochemical microscopy. Experiments show that the passage through the Layer is considerably enhanced when the transferred charges are brought globally to the surface by the ferrocenyl dendrimer instead of a single ferrocene molecule. This result shows that charge tunneling through an insulator could be promoted by a purely molecular nano-object. S everal recent studies have highlighted that the charge transfer through an Insulating Layer from a molecule present in solution to a substrate could be restored by attaching a few nanoparticles 1−4 and even a single nanoparticle on the outside of an Insulating Layer. 5,6 Theoretical analyses have provided some explanations to understand the origins of this phenomenon. 7,8 A higher density of state in a metallic nanoparticle enhances the electron tunneling across the Insulating Layer and thus the global kinetics of electron transfer. In other words, tunneling from a nanoparticle to a substrate is much more probable than tunneling from single molecules. Beside the fundamental consequences of this observation, it has already opened a route to the developments of novel analytical methods, whereby a nano-particle deposited on an Insulating Layer behaves as a functional nanoelectrode. 5,6
Sebastien Lhenry - One of the best experts on this subject based on the ideXlab platform.
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Tunneling Dendrimers. Enhancing Charge Transport through Insulating Layer Using Redox Molecular Objects
Journal of the American Chemical Society, 2015Co-Authors: Sebastien Lhenry, Joanna Jalkh, Leroux Yann, Roberto Ciganda, Dominique Astruc, Jaime Ruiz, Philippe HapiotAbstract:Charge transport through an Insulating Layer was probed using ferrocenyl-terminated dendrimers and scanning electrochemical microscopy. Experiments show that the passage through the Layer is considerably enhanced when the transferred charges are brought globally to the surface by the ferrocenyl dendrimer instead of a single ferrocene molecule. This result shows that charge tunneling through an insulator could be promoted by a purely molecular nano-object. S everal recent studies have highlighted that the charge transfer through an Insulating Layer from a molecule present in solution to a substrate could be restored by attaching a few nanoparticles 1−4 and even a single nanoparticle on the outside of an Insulating Layer. 5,6 Theoretical analyses have provided some explanations to understand the origins of this phenomenon. 7,8 A higher density of state in a metallic nanoparticle enhances the electron tunneling across the Insulating Layer and thus the global kinetics of electron transfer. In other words, tunneling from a nanoparticle to a substrate is much more probable than tunneling from single molecules. Beside the fundamental consequences of this observation, it has already opened a route to the developments of novel analytical methods, whereby a nano-particle deposited on an Insulating Layer behaves as a functional nanoelectrode. 5,6
