The Experts below are selected from a list of 9270 Experts worldwide ranked by ideXlab platform
Anton Setzer - One of the best experts on this subject based on the ideXlab platform.
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can doping Graphite trigger room temperature superconductivity evidence for granular high temperature superconductivity in water treated Graphite Powder
arXiv: Superconductivity, 2012Co-Authors: T. Scheike, Winfried Böhlmann, A. Ballestar, Pablo Esquinazi, J Barzolaquiquia, Anton SetzerAbstract:Trying to dope Graphite flakes we found that the magnetization of pure, several tens of micrometers grain size Graphite Powder and after a simple treatment with pure water shows clear and reproducible granular superconducting behavior with a critical temperature above 300K. The observed magnetic characteristics as a function of temperature, magnetic field and time, provide evidence for weakly coupled grains through Josephson interaction, revealing the existence of superconducting vortices.
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Can doping Graphite trigger room temperature superconductivity? Evidence for granular high-temperature superconductivity in water-treated Graphite Powder
Advanced Materials, 2012Co-Authors: T. Scheike, J Barzola-quiquia, Winfried Böhlmann, A. Ballestar, Pablo Esquinazi, Anton SetzerAbstract:Granular superconductivity in Powders of small Graphite grains (several tens of micrometers) is demonstrated after treatment with pure water. The temperature, magnetic field and time dependence of the magnetic moment of the treated Graphite Powder provides evidence for the existence of superconducting vortices with some similarities to high-temperature granular superconducting oxides but even at temperatures above 300 K. Room temperature superconductivity in doped Graphite or at its interfaces appears to be possible.
Natalia P Ivleva - One of the best experts on this subject based on the ideXlab platform.
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soot structure and reactivity analysis by raman microspectroscopy temperature programmed oxidation and high resolution transmission electron microscopy
Journal of Physical Chemistry A, 2009Co-Authors: Markus Knauer, Manfred Erwin Schuster, Robert Schlogl, Reinhard Niessner, Natalia P IvlevaAbstract:Raman microspectroscopy (RM), temperature-programmed oxidation (TPO), high-resolution transmission electron microscopy (HRTEM), and electron energy loss spectroscopy (EELS) were combined to get comprehensive information on the relationship between structure and reactivity of soot in samples of spark discharge (GfG), heavy duty engine diesel (EURO VI and IV) soot, and Graphite Powder upon oxidation by oxygen at increasing temperatures. GfG soot and Graphite Powder represent the higher and lower reactivity limits. Raman microspectroscopic analysis was conducted by determination of spectral parameters using a five band fitting procedure (G, D1-D4) as well as by evaluation of the dispersive character of the D mode. The analysis of spectral parameters shows a higher degree of disorder and a higher amount of molecular carbon for untreated GfG soot samples than for samples of untreated EURO VI and EURO IV soot. The structural analysis based on the dispersive character of the D mode revealed substantial differences in ordering descending from Graphite Powder, EURO IV, VI to GfG soot. HRTEM images and EELS analysis of EURO IV and VI samples indicated a different morphology and a higher structural order as compared to GfG soot in full agreement with the Raman analysis. These findings are also confirmed by the reactivity of soot during oxidation (TPO), where GfG soot was found to be the most reactive and EURO IV and VI soot samples exhibited a moderate reactivity.
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soot structure and reactivity analysis by raman microspectroscopy temperature programmed oxidation and high resolution transmission electron microscopy
Journal of Physical Chemistry A, 2009Co-Authors: Markus Knauer, Manfred Erwin Schuster, Robert Schlogl, Reinhard Niessner, Dang Sheng Su, Natalia P IvlevaAbstract:Raman microspectroscopy (RM), temperature-programmed oxidation (TPO), high-resolution transmission electron microscopy (HRTEM), and electron energy loss spectroscopy (EELS) were combined to get comprehensive information on the relationship between structure and reactivity of soot in samples of spark discharge (GfG), heavy duty engine diesel (EURO VI and IV) soot, and Graphite Powder upon oxidation by oxygen at increasing temperatures. GfG soot and Graphite Powder represent the higher and lower reactivity limits. Raman microspectroscopic analysis was conducted by determination of spectral parameters using a five band fitting procedure (G, D1−D4) as well as by evaluation of the dispersive character of the D mode. The analysis of spectral parameters shows a higher degree of disorder and a higher amount of molecular carbon for untreated GfG soot samples than for samples of untreated EURO VI and EURO IV soot. The structural analysis based on the dispersive character of the D mode revealed substantial differenc...
T. Scheike - One of the best experts on this subject based on the ideXlab platform.
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can doping Graphite trigger room temperature superconductivity evidence for granular high temperature superconductivity in water treated Graphite Powder
arXiv: Superconductivity, 2012Co-Authors: T. Scheike, Winfried Böhlmann, A. Ballestar, Pablo Esquinazi, J Barzolaquiquia, Anton SetzerAbstract:Trying to dope Graphite flakes we found that the magnetization of pure, several tens of micrometers grain size Graphite Powder and after a simple treatment with pure water shows clear and reproducible granular superconducting behavior with a critical temperature above 300K. The observed magnetic characteristics as a function of temperature, magnetic field and time, provide evidence for weakly coupled grains through Josephson interaction, revealing the existence of superconducting vortices.
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Can doping Graphite trigger room temperature superconductivity? Evidence for granular high-temperature superconductivity in water-treated Graphite Powder
Advanced Materials, 2012Co-Authors: T. Scheike, J Barzola-quiquia, Winfried Böhlmann, A. Ballestar, Pablo Esquinazi, Anton SetzerAbstract:Granular superconductivity in Powders of small Graphite grains (several tens of micrometers) is demonstrated after treatment with pure water. The temperature, magnetic field and time dependence of the magnetic moment of the treated Graphite Powder provides evidence for the existence of superconducting vortices with some similarities to high-temperature granular superconducting oxides but even at temperatures above 300 K. Room temperature superconductivity in doped Graphite or at its interfaces appears to be possible.
Markus Knauer - One of the best experts on this subject based on the ideXlab platform.
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soot structure and reactivity analysis by raman microspectroscopy temperature programmed oxidation and high resolution transmission electron microscopy
Journal of Physical Chemistry A, 2009Co-Authors: Markus Knauer, Manfred Erwin Schuster, Robert Schlogl, Reinhard Niessner, Natalia P IvlevaAbstract:Raman microspectroscopy (RM), temperature-programmed oxidation (TPO), high-resolution transmission electron microscopy (HRTEM), and electron energy loss spectroscopy (EELS) were combined to get comprehensive information on the relationship between structure and reactivity of soot in samples of spark discharge (GfG), heavy duty engine diesel (EURO VI and IV) soot, and Graphite Powder upon oxidation by oxygen at increasing temperatures. GfG soot and Graphite Powder represent the higher and lower reactivity limits. Raman microspectroscopic analysis was conducted by determination of spectral parameters using a five band fitting procedure (G, D1-D4) as well as by evaluation of the dispersive character of the D mode. The analysis of spectral parameters shows a higher degree of disorder and a higher amount of molecular carbon for untreated GfG soot samples than for samples of untreated EURO VI and EURO IV soot. The structural analysis based on the dispersive character of the D mode revealed substantial differences in ordering descending from Graphite Powder, EURO IV, VI to GfG soot. HRTEM images and EELS analysis of EURO IV and VI samples indicated a different morphology and a higher structural order as compared to GfG soot in full agreement with the Raman analysis. These findings are also confirmed by the reactivity of soot during oxidation (TPO), where GfG soot was found to be the most reactive and EURO IV and VI soot samples exhibited a moderate reactivity.
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soot structure and reactivity analysis by raman microspectroscopy temperature programmed oxidation and high resolution transmission electron microscopy
Journal of Physical Chemistry A, 2009Co-Authors: Markus Knauer, Manfred Erwin Schuster, Robert Schlogl, Reinhard Niessner, Dang Sheng Su, Natalia P IvlevaAbstract:Raman microspectroscopy (RM), temperature-programmed oxidation (TPO), high-resolution transmission electron microscopy (HRTEM), and electron energy loss spectroscopy (EELS) were combined to get comprehensive information on the relationship between structure and reactivity of soot in samples of spark discharge (GfG), heavy duty engine diesel (EURO VI and IV) soot, and Graphite Powder upon oxidation by oxygen at increasing temperatures. GfG soot and Graphite Powder represent the higher and lower reactivity limits. Raman microspectroscopic analysis was conducted by determination of spectral parameters using a five band fitting procedure (G, D1−D4) as well as by evaluation of the dispersive character of the D mode. The analysis of spectral parameters shows a higher degree of disorder and a higher amount of molecular carbon for untreated GfG soot samples than for samples of untreated EURO VI and EURO IV soot. The structural analysis based on the dispersive character of the D mode revealed substantial differenc...
Pablo Esquinazi - One of the best experts on this subject based on the ideXlab platform.
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can doping Graphite trigger room temperature superconductivity evidence for granular high temperature superconductivity in water treated Graphite Powder
arXiv: Superconductivity, 2012Co-Authors: T. Scheike, Winfried Böhlmann, A. Ballestar, Pablo Esquinazi, J Barzolaquiquia, Anton SetzerAbstract:Trying to dope Graphite flakes we found that the magnetization of pure, several tens of micrometers grain size Graphite Powder and after a simple treatment with pure water shows clear and reproducible granular superconducting behavior with a critical temperature above 300K. The observed magnetic characteristics as a function of temperature, magnetic field and time, provide evidence for weakly coupled grains through Josephson interaction, revealing the existence of superconducting vortices.
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Can doping Graphite trigger room temperature superconductivity? Evidence for granular high-temperature superconductivity in water-treated Graphite Powder
Advanced Materials, 2012Co-Authors: T. Scheike, J Barzola-quiquia, Winfried Böhlmann, A. Ballestar, Pablo Esquinazi, Anton SetzerAbstract:Granular superconductivity in Powders of small Graphite grains (several tens of micrometers) is demonstrated after treatment with pure water. The temperature, magnetic field and time dependence of the magnetic moment of the treated Graphite Powder provides evidence for the existence of superconducting vortices with some similarities to high-temperature granular superconducting oxides but even at temperatures above 300 K. Room temperature superconductivity in doped Graphite or at its interfaces appears to be possible.
