Experience

Publications

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Spin-wave modes in magnetic nanowires

  JOURNAL OF APPLIED PHYSICS, 93, 10, 7604-7606

  Spin-wave modes in magnetic transition-metal nanowires having diameters of about 10 nm and lengths on the order of 1 mm are investigated by model calculations. There are quasicontinuous modes with k vectors parallel to the wires axis and discrete modes with k vectors perpendicular to the wire axis. Due to the small cross section of the wires, the perpendicular modes can be ignored in many cases and the low-temperature behavior of the wires is quasi one-dimensional. Using an analytic approach and exploiting the analogy between micromagnetism and quantum mechanics it is shown that all spin-wave modes with k vectors parallel to the wire axis are localized. The spin-wave localization is a micromagnetic analog to the Anderson localization of conduction electrons due to randomness in less than two dimensions, and, as in the electron analogy, arbitrarily small disorder is sufficient to cause the localization of all modes.

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Spin-wave modes in magnetic nanowires

  JOURNAL OF APPLIED PHYSICS, 93, 10, 7604-7606

  Spin-wave modes in magnetic transition-metal nanowires having diameters of about 10 nm and lengths on the order of 1 mm are investigated by model calculations. There are quasicontinuous modes with k vectors parallel to the wires axis and discrete modes with k vectors perpendicular to the wire axis. Due to the small cross section of the wires, the perpendicular modes can be ignored in many cases and the low-temperature behavior of the wires is quasi one-dimensional. Using an analytic approach and exploiting the analogy between micromagnetism and quantum mechanics it is shown that all spin-wave modes with k vectors parallel to the wire axis are localized. The spin-wave localization is a micromagnetic analog to the Anderson localization of conduction electrons due to randomness in less than two dimensions, and, as in the electron analogy, arbitrarily small disorder is sufficient to cause the localization of all modes.

• On the assessment of the orientation of carbon nanofibers dispersed within polyethylene by electron spin resonance spectroscopy

  Carbon 45, 2692–2716(2007)

  This letter reports on the possibility of using electron spin resonance (ESR) spectroscopy to assess the orientation of carbon nanofibers (CNF) within polymeric matrices (actually within polyethylene).

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Spin-wave modes in magnetic nanowires

  JOURNAL OF APPLIED PHYSICS, 93, 10, 7604-7606

  Spin-wave modes in magnetic transition-metal nanowires having diameters of about 10 nm and lengths on the order of 1 mm are investigated by model calculations. There are quasicontinuous modes with k vectors parallel to the wires axis and discrete modes with k vectors perpendicular to the wire axis. Due to the small cross section of the wires, the perpendicular modes can be ignored in many cases and the low-temperature behavior of the wires is quasi one-dimensional. Using an analytic approach and exploiting the analogy between micromagnetism and quantum mechanics it is shown that all spin-wave modes with k vectors parallel to the wire axis are localized. The spin-wave localization is a micromagnetic analog to the Anderson localization of conduction electrons due to randomness in less than two dimensions, and, as in the electron analogy, arbitrarily small disorder is sufficient to cause the localization of all modes.

• On the assessment of the orientation of carbon nanofibers dispersed within polyethylene by electron spin resonance spectroscopy

  Carbon 45, 2692–2716(2007)

  This letter reports on the possibility of using electron spin resonance (ESR) spectroscopy to assess the orientation of carbon nanofibers (CNF) within polymeric matrices (actually within polyethylene).

• Ferromagnetic resonance investigations on Ga0.965Mn0.035As film

  JOURNAL OF APPLIED PHYSICS 99, 113908, 2006

  Ga0.965Mn0.035As film between 5 and 40 K are reported. The in-plane and out-of-the-plane angular dependencies of the resonance field were analyzed within the Landau-Lifshitz-Gilbert approach. The second- and fourth-order magnetic anisotropy energies were derived. The temperature dependence of magnetization and of magnetic anisotropy were studied by superconducting quantum interference device and ferromagnetic resonance.

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Spin-wave modes in magnetic nanowires

  JOURNAL OF APPLIED PHYSICS, 93, 10, 7604-7606

  Spin-wave modes in magnetic transition-metal nanowires having diameters of about 10 nm and lengths on the order of 1 mm are investigated by model calculations. There are quasicontinuous modes with k vectors parallel to the wires axis and discrete modes with k vectors perpendicular to the wire axis. Due to the small cross section of the wires, the perpendicular modes can be ignored in many cases and the low-temperature behavior of the wires is quasi one-dimensional. Using an analytic approach and exploiting the analogy between micromagnetism and quantum mechanics it is shown that all spin-wave modes with k vectors parallel to the wire axis are localized. The spin-wave localization is a micromagnetic analog to the Anderson localization of conduction electrons due to randomness in less than two dimensions, and, as in the electron analogy, arbitrarily small disorder is sufficient to cause the localization of all modes.

• On the assessment of the orientation of carbon nanofibers dispersed within polyethylene by electron spin resonance spectroscopy

  Carbon 45, 2692–2716(2007)

  This letter reports on the possibility of using electron spin resonance (ESR) spectroscopy to assess the orientation of carbon nanofibers (CNF) within polymeric matrices (actually within polyethylene).

• Ferromagnetic resonance investigations on Ga0.965Mn0.035As film

  JOURNAL OF APPLIED PHYSICS 99, 113908, 2006

  Ga0.965Mn0.035As film between 5 and 40 K are reported. The in-plane and out-of-the-plane angular dependencies of the resonance field were analyzed within the Landau-Lifshitz-Gilbert approach. The second- and fourth-order magnetic anisotropy energies were derived. The temperature dependence of magnetization and of magnetic anisotropy were studied by superconducting quantum interference device and ferromagnetic resonance.

• Convenient, Rapid Synthesis of Ag Nanowires

  Chem. Mater.2007, 19, 1755-1760

  "Do you own a microwave oven in your kitchen? This is the story of mine!" The rapid, microwave-assisted aerobic synthesis of silver nanowires based on the polyol method is described.

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Spin-wave modes in magnetic nanowires

  JOURNAL OF APPLIED PHYSICS, 93, 10, 7604-7606

  Spin-wave modes in magnetic transition-metal nanowires having diameters of about 10 nm and lengths on the order of 1 mm are investigated by model calculations. There are quasicontinuous modes with k vectors parallel to the wires axis and discrete modes with k vectors perpendicular to the wire axis. Due to the small cross section of the wires, the perpendicular modes can be ignored in many cases and the low-temperature behavior of the wires is quasi one-dimensional. Using an analytic approach and exploiting the analogy between micromagnetism and quantum mechanics it is shown that all spin-wave modes with k vectors parallel to the wire axis are localized. The spin-wave localization is a micromagnetic analog to the Anderson localization of conduction electrons due to randomness in less than two dimensions, and, as in the electron analogy, arbitrarily small disorder is sufficient to cause the localization of all modes.

• On the assessment of the orientation of carbon nanofibers dispersed within polyethylene by electron spin resonance spectroscopy

  Carbon 45, 2692–2716(2007)

  This letter reports on the possibility of using electron spin resonance (ESR) spectroscopy to assess the orientation of carbon nanofibers (CNF) within polymeric matrices (actually within polyethylene).

• Ferromagnetic resonance investigations on Ga0.965Mn0.035As film

  JOURNAL OF APPLIED PHYSICS 99, 113908, 2006

  Ga0.965Mn0.035As film between 5 and 40 K are reported. The in-plane and out-of-the-plane angular dependencies of the resonance field were analyzed within the Landau-Lifshitz-Gilbert approach. The second- and fourth-order magnetic anisotropy energies were derived. The temperature dependence of magnetization and of magnetic anisotropy were studied by superconducting quantum interference device and ferromagnetic resonance.

• Convenient, Rapid Synthesis of Ag Nanowires

  Chem. Mater.2007, 19, 1755-1760

  "Do you own a microwave oven in your kitchen? This is the story of mine!" The rapid, microwave-assisted aerobic synthesis of silver nanowires based on the polyol method is described.

• Thermal property of regioregular poly(3-hexylthiophene)/nanotube composites using modified single-walled carbon nanotubes via ion irradiation

  Nanotechnology 17 (2006) 5947–5953

  The effects of radiation-induced modifications on the thermal stability and phase transition behavior of composites made of 1% pristine or ion irradiated single-walled carbon nanotubes (SWNTs) and poly(3-hexylthiophene) (P3HT) are reported.....

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

• Electrorheological Analysis of Colloidal Dispersions of Aluminum Oxide and Silicone Oil

  Journal of Nanoscience and Nanotechnology

  The electrorheological properties of colloidal dispersions of aluminum oxide nanotubes and nanoparticles in silicone oil were investigated. The shear storage modulus of colloidal dispersions containing 5 wt% of aluminum oxide nanotubes increased by four orders of magnitude upon the application of an external electric field of as low as 400 V/mm. The storage modulus of the nanotube systems increased further by increasing the concentration of nanotubes. The electrorheological response of aluminum oxide nanoparticles dispersions was significantly lower than that of the dispersions containing the same weight fraction of aluminum oxide nanotubes at the same external electric field. This result reflects the effect of shape anisotropy on the electrorheological features of colloidal dispersions.

• Spin-wave modes in magnetic nanowires

  JOURNAL OF APPLIED PHYSICS, 93, 10, 7604-7606

  Spin-wave modes in magnetic transition-metal nanowires having diameters of about 10 nm and lengths on the order of 1 mm are investigated by model calculations. There are quasicontinuous modes with k vectors parallel to the wires axis and discrete modes with k vectors perpendicular to the wire axis. Due to the small cross section of the wires, the perpendicular modes can be ignored in many cases and the low-temperature behavior of the wires is quasi one-dimensional. Using an analytic approach and exploiting the analogy between micromagnetism and quantum mechanics it is shown that all spin-wave modes with k vectors parallel to the wire axis are localized. The spin-wave localization is a micromagnetic analog to the Anderson localization of conduction electrons due to randomness in less than two dimensions, and, as in the electron analogy, arbitrarily small disorder is sufficient to cause the localization of all modes.

• On the assessment of the orientation of carbon nanofibers dispersed within polyethylene by electron spin resonance spectroscopy

  Carbon 45, 2692–2716(2007)

  This letter reports on the possibility of using electron spin resonance (ESR) spectroscopy to assess the orientation of carbon nanofibers (CNF) within polymeric matrices (actually within polyethylene).

• Ferromagnetic resonance investigations on Ga0.965Mn0.035As film

  JOURNAL OF APPLIED PHYSICS 99, 113908, 2006

  Ga0.965Mn0.035As film between 5 and 40 K are reported. The in-plane and out-of-the-plane angular dependencies of the resonance field were analyzed within the Landau-Lifshitz-Gilbert approach. The second- and fourth-order magnetic anisotropy energies were derived. The temperature dependence of magnetization and of magnetic anisotropy were studied by superconducting quantum interference device and ferromagnetic resonance.

• Convenient, Rapid Synthesis of Ag Nanowires

  Chem. Mater.2007, 19, 1755-1760

  "Do you own a microwave oven in your kitchen? This is the story of mine!" The rapid, microwave-assisted aerobic synthesis of silver nanowires based on the polyol method is described.

• Thermal property of regioregular poly(3-hexylthiophene)/nanotube composites using modified single-walled carbon nanotubes via ion irradiation

  Nanotechnology 17 (2006) 5947–5953

  The effects of radiation-induced modifications on the thermal stability and phase transition behavior of composites made of 1% pristine or ion irradiated single-walled carbon nanotubes (SWNTs) and poly(3-hexylthiophene) (P3HT) are reported.....

• On styrene-butadiene-styrene-barium ferrite nanocomposites

  Composites B, 35, 235-243 (2004)

  "Self-assembled blockcopolymers filled with magnetic nanoparticles...is this the future magnetic media?"' Magnetic investigations on a nanocomposite material obtained by spinning solutions of styrene-butadiene-styrene block copolymer containing barium ferrite nanoparticles onto Si wafers are reported. The effect of the spinning frequency on the magnetic features is discussed. It is observed that the magnetization at saturation is decreased as the spinning frequency is increased as the centrifuge force removes the magnetic nanoparticles from the solution. This is supported by the derivative of the hysteresis loops, which show two components, one with a high coercive field and another with a small coercive field. Increasing the spinning frequency increases the weight of the low coercive field component. The anisotropy in the distribution of magnetic nanoparticles, triggered eventually by the self-assembly capabilities of the matrix, is revealed by the difference between the coercive field in parallel and perpendicular configuration. It is noticed that increasing the spinning frequency enhances this difference. The effect of annealing the nanocomposite films is discussed.