The Experts below are selected from a list of 1509 Experts worldwide ranked by ideXlab platform

Hitoshi Watarai - One of the best experts on this subject based on the ideXlab platform.

  • brownian motion Magnetophoresis of nano micro particles
    Analyst, 2012
    Co-Authors: Makoto Kawano, Hitoshi Watarai
    Abstract:

    A new Magnetophoresis method to determine the magnetic susceptibility of single nano/microparticles was developed by applying Brownian motion analysis to determine the size of the particle. This method could measure simultaneously both the magnetophoretic velocity and the radius of the identical single nano/microparticles, which are necessary for the determination of the magnetic susceptibility of the particle. The advantage of this method was demonstrated by the measurement of the diamagnetic susceptibilities of polystyrene particles 500 nm–3 μm in diameter in a paramagnetic 0.5 M manganese(II) chloride solution under a high magnetic field gradient of 5180 T2 m−1 generated by a small magnetic circuit.

  • Brownian motion-Magnetophoresis of nano/micro-particles.
    Analyst, 2012
    Co-Authors: Makoto Kawano, Hitoshi Watarai
    Abstract:

    A new Magnetophoresis method to determine the magnetic susceptibility of single nano/microparticles was developed by applying Brownian motion analysis to determine the size of the particle. This method could measure simultaneously both the magnetophoretic velocity and the radius of the identical single nano/microparticles, which are necessary for the determination of the magnetic susceptibility of the particle. The advantage of this method was demonstrated by the measurement of the diamagnetic susceptibilities of polystyrene particles 500 nm–3 μm in diameter in a paramagnetic 0.5 M manganese(II) chloride solution under a high magnetic field gradient of 5180 T2 m−1 generated by a small magnetic circuit.

  • two dimensional flow Magnetophoresis of microparticles
    Analytical and Bioanalytical Chemistry, 2012
    Co-Authors: Makoto Kawano, Hitoshi Watarai
    Abstract:

    A new two-dimensional micro-flow Magnetophoresis device was constructed in a superconducting magnet (10 T) using triangular shaped pole pieces, which could apply a magnetic strength, B(dB/dx), in the range of ca. 0–14,000 T2 m−1 across a capillary cell. Polystyrene particles with diameters of 1, 3, and 6 μm were used as test samples in a paramagnetic medium of 1 M MnCl2 to evaluate the performance of this method. Microparticles migrated across the capillary along the edge of the pole pieces, and then flowed through the gap in the pole piece at a position defined as the migration distance, depending on the magnetic susceptibility and the size of particles as well as the flow rate. The most effective flow rate to exhibit the largest resolution among the particles was theoretically predicted and experimentally confirmed. By this method, the magnetic susceptibilities of individual deoxygenated and non-deoxygenated red blood cells were measured from the relative migration distance.

  • Magnetoanalysis of micro/nanoparticles: A review
    Analytica Chimica Acta, 2011
    Co-Authors: Masayori Suwa, Hitoshi Watarai
    Abstract:

    Application of magnetic field on the separation and analysis of nano/microparticles is a growing subject in analytical separation chemistry. The migration phenomenon of a particle under inhomogeneous magnetic field is called Magnetophoresis. The migration velocity depends on the magnetic susceptibility and the size of a particle. Therefore, Magnetophoresis allows us to determine the magnetic susceptibility of particles, and to separate particles based on the magnetic properties. Magnetic separation of ferromagnetic particles in liquid has been utilized for a long time. For example, a high gradient magnetic separation under the non-uniform magnetic field generated by ferromagnetic mesh has been utilized in a wide region from chemical industry to bioscience. Recent progress on magnetic nanoparticles and microfluidic devices has made it possible to extend the range of application. Furthermore, it has been demonstrated that the very sensitive measurement of the magnetic susceptibility of microparticles can be performed by observing magnetophoretic velocity. In this review, we mainly introduce novel separation and detection methods based on Magnetophoresis, which have been invented in this decade, and then new principles of particle migration under magnetic field are presented. © 2011 Elsevier B.V.

  • nano gap Magnetophoresis with raman spectroscopic detection
    Analytical Sciences, 2010
    Co-Authors: Makoto Kawano, Jennifer L Young, Hitoshi Watarai
    Abstract:

    : As a tool to determine the magnetic susceptibility of a nano/microparticle in a liquid, a nano-gap Magnetophoresis device was fabricated using tilted flat glass plates and a permanent magnet. The nano-gap device was not only used to determine the size of particles, but also directly provided measurements of Raman spectra of fractionally trapped particles in the nano-gap device. The performance of the new hyphenated method was demonstrated by an analysis of suspended particle matter in traffic air.

Pengbo Zhang - One of the best experts on this subject based on the ideXlab platform.

  • simulation of Magnetophoresis of magnetic nanoparticles in liquids
    Journal of Physics D, 2016
    Co-Authors: Pengbo Zhang
    Abstract:

    Magnetophoresis, which is known as a process of driving magnetic particles to depart from the dispersion in the presence of an external inhomogeneous magnetic field, has gained substantial investigations due to its significance in various fields. The main objective of this paper is to analyze the magnetophoretic mechanism of magnetic nanoparticles in fluids with a Lagrangian approach. The equivalent current source method is used to calculate the magnetic field of a cylindrical permanent magnet, which provides a feasible way to simulate the Magnetophoresis process. Then the magnetophoretic velocity of particles and the influence of various key factors, e.g. the dimension of a cylindrical permanent magnet, the saturation magnetization of particles and the viscosity of fluid, are investigated. Furthermore, an efficient algorithm is proposed to calculate the trajectory of particles, and to describe the capture efficiency of the particles and the distribution of the captured particles at different times. In addition, the applicability of the Lagrangian approach is also discussed.

  • Simulation of Magnetophoresis of magnetic nanoparticles in liquids
    Journal of Physics D: Applied Physics, 2016
    Co-Authors: Zongqian Shi, Jiajia Sun, Shenli Jia, Pengbo Zhang
    Abstract:

    Journal of Physics D: Applied Physics, 49 (2016) 335005. doi: 10.1088/0022-3727/49/33/335005

Sim Siong Leong - One of the best experts on this subject based on the ideXlab platform.

Makoto Kawano - One of the best experts on this subject based on the ideXlab platform.

  • brownian motion Magnetophoresis of nano micro particles
    Analyst, 2012
    Co-Authors: Makoto Kawano, Hitoshi Watarai
    Abstract:

    A new Magnetophoresis method to determine the magnetic susceptibility of single nano/microparticles was developed by applying Brownian motion analysis to determine the size of the particle. This method could measure simultaneously both the magnetophoretic velocity and the radius of the identical single nano/microparticles, which are necessary for the determination of the magnetic susceptibility of the particle. The advantage of this method was demonstrated by the measurement of the diamagnetic susceptibilities of polystyrene particles 500 nm–3 μm in diameter in a paramagnetic 0.5 M manganese(II) chloride solution under a high magnetic field gradient of 5180 T2 m−1 generated by a small magnetic circuit.

  • Brownian motion-Magnetophoresis of nano/micro-particles.
    Analyst, 2012
    Co-Authors: Makoto Kawano, Hitoshi Watarai
    Abstract:

    A new Magnetophoresis method to determine the magnetic susceptibility of single nano/microparticles was developed by applying Brownian motion analysis to determine the size of the particle. This method could measure simultaneously both the magnetophoretic velocity and the radius of the identical single nano/microparticles, which are necessary for the determination of the magnetic susceptibility of the particle. The advantage of this method was demonstrated by the measurement of the diamagnetic susceptibilities of polystyrene particles 500 nm–3 μm in diameter in a paramagnetic 0.5 M manganese(II) chloride solution under a high magnetic field gradient of 5180 T2 m−1 generated by a small magnetic circuit.

  • two dimensional flow Magnetophoresis of microparticles
    Analytical and Bioanalytical Chemistry, 2012
    Co-Authors: Makoto Kawano, Hitoshi Watarai
    Abstract:

    A new two-dimensional micro-flow Magnetophoresis device was constructed in a superconducting magnet (10 T) using triangular shaped pole pieces, which could apply a magnetic strength, B(dB/dx), in the range of ca. 0–14,000 T2 m−1 across a capillary cell. Polystyrene particles with diameters of 1, 3, and 6 μm were used as test samples in a paramagnetic medium of 1 M MnCl2 to evaluate the performance of this method. Microparticles migrated across the capillary along the edge of the pole pieces, and then flowed through the gap in the pole piece at a position defined as the migration distance, depending on the magnetic susceptibility and the size of particles as well as the flow rate. The most effective flow rate to exhibit the largest resolution among the particles was theoretically predicted and experimentally confirmed. By this method, the magnetic susceptibilities of individual deoxygenated and non-deoxygenated red blood cells were measured from the relative migration distance.

  • nano gap Magnetophoresis with raman spectroscopic detection
    Analytical Sciences, 2010
    Co-Authors: Makoto Kawano, Jennifer L Young, Hitoshi Watarai
    Abstract:

    : As a tool to determine the magnetic susceptibility of a nano/microparticle in a liquid, a nano-gap Magnetophoresis device was fabricated using tilted flat glass plates and a permanent magnet. The nano-gap device was not only used to determine the size of particles, but also directly provided measurements of Raman spectra of fractionally trapped particles in the nano-gap device. The performance of the new hyphenated method was demonstrated by an analysis of suspended particle matter in traffic air.

Zainal Ariffin Ahmad - One of the best experts on this subject based on the ideXlab platform.