The Experts below are selected from a list of 28869 Experts worldwide ranked by ideXlab platform

Klaas Wynne - One of the best experts on this subject based on the ideXlab platform.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties
    Journal of Physical Chemistry B, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI+ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI+ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties b
    The Journal of Physical Chemistry, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI⁺ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI⁺ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

Nilesh R Dhumal - One of the best experts on this subject based on the ideXlab platform.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties
    Journal of Physical Chemistry B, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI+ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI+ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties b
    The Journal of Physical Chemistry, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI⁺ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI⁺ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

David A Turton - One of the best experts on this subject based on the ideXlab platform.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties
    Journal of Physical Chemistry B, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI+ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI+ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties b
    The Journal of Physical Chemistry, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI⁺ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI⁺ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

Johannes Kiefer - One of the best experts on this subject based on the ideXlab platform.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties
    Journal of Physical Chemistry B, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI+ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI+ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

  • Dielectric Relaxation of the ionic liquid 1 ethyl 3 methylimidazolium ethyl sulfate microwave and far ir properties b
    The Journal of Physical Chemistry, 2017
    Co-Authors: Nilesh R Dhumal, Johannes Kiefer, David A Turton, Klaas Wynne
    Abstract:

    Dielectric Relaxation of the ionic liquid, 1-ethyl-3-methylimidazolium ethyl sulfate (EMI⁺ETS–), is studied using molecular dynamics (MD) simulations. The collective dynamics of polarization arising from cations and anions are examined. Characteristics of the rovibrational and translational components of polarization dynamics are analyzed to understand their respective roles in the microwave and terahertz regions of Dielectric Relaxation. The MD results are compared with the experimental low-frequency spectrum of EMI⁺ETS–, obtained via ultrafast optical Kerr effect (OKE) measurements.

Clive A Randall - One of the best experts on this subject based on the ideXlab platform.

  • Dielectric Relaxation and localized electron hopping in colossal Dielectric (Nb,In)-doped TiO2 rutile nanoceramics
    Physical Chemistry Chemical Physics, 2017
    Co-Authors: Kosuke Tsuji, Sophie Guillemet Fritsch, Clive A Randall
    Abstract:

    Dielectric spectroscopy was performed on a Nb and In co-doped rutile TiO2 nano-crystalline ceramic (n-NITO) synthesized by a low-temperature spark plasma sintering (SPS) technique. The Dielectric properties of the n-NITO were not largely affected by the metal electrode contacts. Huge Dielectric Relaxation was observed at a very low temperature below 35 K. Both the activation energy and Relaxation time suggested that the electronic hopping motion is the underlying mechanism responsible for the colossal Dielectric permittivity (CP) and its Relaxation, instead of the internal barrier layer effect or a dipolar Relaxation. With Havriliak–Negami (H–N) fitting, a Relaxation time with a large distribution of Dielectric Relaxations was revealed. The broad distributed Relaxation phenomena indicated that Nb and In were involved, controlling the Dielectric Relaxation by modifying the polarization mechanism and localized states. The associated distribution function is calculated and presented. The frequency-dependent a.c. conductance is successfully explained by a hopping conduction model of the localized electrons with the distribution function. It is demonstrated that the Dielectric Relaxation is strongly correlated with the hopping electrons in the localized states. The CP in SPS n-NITO is then ascribed to a hopping polarization.

  • correlation between infrared phonon modes and Dielectric Relaxation in bi2o3 zno nb2o5 cubic pyrochlore
    Applied Physics Letters, 2002
    Co-Authors: Juan C Nino, Michael T Lanagan, Clive A Randall, Stanislav Kamba
    Abstract:

    Analysis of the Dielectric Relaxation phenomena in Bi2O3–ZnO–Nb2O5 cubic pyrochlore utilizing the Arrhenius equation is revisited to include recent high-frequency measurements. The fitting parameters obtained are further analyzed by comparison with theoretical and experimental activation energies of better understood Relaxation systems such as dipolar glasses and relaxor ferroelectrics. The attempt jump frequency obtained from the Arrhenius fit (ν0∼4.385 THz) is found in correspondence with the resonant frequencies of the polar phonon modes previously identified by infrared spectroscopy. This correlation, and in particular the role of the O–A–O and O′–A–O′ bending phonon modes in driving the Relaxation, is discussed.

  • Dielectric Relaxation in bi2o3 zno nb2o5 cubic pyrochlore
    Journal of Applied Physics, 2001
    Co-Authors: Juan C Nino, Michael T Lanagan, Clive A Randall
    Abstract:

    Frequency dispersion associated with Dielectric Relaxation phenomena in polycrystalline cubic pyrochlore with normal composition (Bi1.5Zn0.5)(Zn0.5Nb1.5)O7 is analyzed. Measurements at cryogenic temperatures and high frequencies reveal a broad distribution of Relaxation times. The associated Dielectric loss data can be modeled with a function convoluting the Vogel–Fulcher law and a Gaussian distribution. This function, dependent only on measuring frequency and temperature, describes exceptionally well the phenomena observed over a frequency range covering seven decades and over 300 K.