Particle & Particle Systems Characterization

Cover image for Particle & Particle Systems Characterization

Special Issue: Selected papers based on presentations at the 8th International Congress on Optical Particle Characterization, 9–13 July 2007 at Graz (Austria)

April, 2008

Volume 25, Issue 1

Pages 3–109

  1. Contents

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors
  2. Research Articles

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors
    1. Dynamic Light Scattering for the Characterization of Polydisperse Fractal Systems: I. Simulation of the Diffusional Behavior (pages 9–18)

      Uwe Kätzel, Rainer Bedrich, Michael Stintz, Roland Ketzmerick, Torsten Gottschalk-Gaudig and Herbert Barthel

      Version of Record online: 12 FEB 2008 | DOI: 10.1002/ppsc.200700004

      This paper addresses the application of dynamic light scattering for the characterization of suspensions of fractal-like aggregates. Simulations are employed to establish a relationship between the structural properties and the diffusional behavior. It is shown that the hydrodynamic radii show a different scaling behaviour compared to the structural properties.

    2. Dynamic Light Scattering for the Characterization of Polydisperse Fractal Systems: II. Relation between Structure and DLS Results (pages 19–30)

      Uwe Kätzel, Manuel Vorbau, Michael Stintz, Torsten Gottschalk-Gaudig and Herbert Barthel

      Version of Record online: 12 FEB 2008 | DOI: 10.1002/ppsc.200700005

      This paper adresses validation of the simulation results of the previous paper by experimental investigations. Therefore, the structure of different pyrogenic silica grades has been characterized by static light and X-ray scattering and compared to the diffusional properties obtained by multi-angle DLS measurements.

    3. Precise Measurement of the Size of Nanoparticles by Dynamic Light Scattering with Uncertainty Analysis (pages 31–38)

      Kayori Takahashi, Haruhisa Kato, Takeshi Saito, Shigetomo Matsuyama and Shinichi Kinugasa

      Version of Record online: 18 MAR 2008 | DOI: 10.1002/ppsc.200700015

      In this work, the precision and the uncertainty of the DLS technique are assessed for the example of polystyrene latex suspensions. Precise measurements of the short time correlation function at seven scattering angles are performed for suspensions of 30–100 nm in size. The DLS results are also compared to the size determined by a differential mobility analyzer (DMA) in air.

    4. Global Rainbow Refractometry with a Selective Imaging Method (pages 39–48)

      Jochen Wilms, Gérard Gréhan and Gérard Lavergne

      Version of Record online: 18 MAR 2008 | DOI: 10.1002/ppsc.200700006

      A single droplet rainbow refractometry method is presented providing also droplet size distributions in sprays. In order to prevent errors from non-spherical droplets, sphericity is estimated based on the measured rainbow and comparison with theory. The droplet temperature and the droplet size distribution of a spray show a better agreement when the new algorithm is applied.

    5. A New Concept to Characterize Nonspherical Particles from Multi-wavelength Depolarization Ratios Based on T-matrix Computation (pages 49–53)

      Toshihiro Somekawa, Chihiro Yamanaka, Masayuki Fujita and Maria Cecillia Galvez

      Version of Record online: 7 FEB 2008 | DOI: 10.1002/ppsc.200700009

      A new concept to derive particle information from depolarization ratios obtained by a simultaneous three-wavelength depolarization lidar is presented. Assessing a mixture of spherical and non-spherical aerosols, the presented method successfully reproduced the lidar data in real.

    6. Extension of RDG-FA for Scattering Prediction of Aggregates of Soot Taking into Account Interactions of Large Monomers (pages 54–67)

      Jérôme Yon, Claude Rozé, Thierry Girasole, Alexis Coppalle and Loïc Méès

      Version of Record online: 11 APR 2008 | DOI: 10.1002/ppsc.200700011

      The characterization of soot fractal aggregates by optical diagnostics is a sensitive and nonintrusive technique. However, important conditions have to be obeyed for the correct use of the common Rayleigh-Debye-Gans theory for Fractal Aggregates (RDG-FA). The aim of the present study is to evaluate possible corrections in order to take into account the presence of aggregates and the internal multiscattering of primary particles.

    7. Q-Space Analysis Applied to Polydisperse, Dense Random Aggregates (pages 68–73)

      J. A. Hubbard, S. J. Eckels and C. M. Sorensen

      Version of Record online: 11 APR 2008 | DOI: 10.1002/ppsc.200700014

      This paper investigates light scattering measurements from spherical shell particles and dense random aggregates. It is shown that information about the particle size distribution and polydispersity can be easily derived if the scattered light intensity is plotted against the scattering wave vector q.

    8. Scattering by Aggregated Fibres Using a Multiple Scattering T-Matrix Approach (pages 74–83)

      Thomas Wriedt, Roman Schuh and Adrian Doicu

      Version of Record online: 11 MAR 2008 | DOI: 10.1002/ppsc.200700022

      In this paper electromagnetic wave scattering by aggregated fibres is considered using a multiple scattering approach and application of a decomposition of the geometry to a number of basic units. The range of validity of this approach is investigated thoroughly and transfer to other geometries is discussed.

    9. Determination of Size Distributions of Concentrated Polymer Particles Embedded in a Solid Polymer Matrix (pages 84–91)

      Ezequiel R. Soulé and Guillermo E. Eliçabe

      Version of Record online: 7 FEB 2008 | DOI: 10.1002/ppsc.200700003

      The size characterization of polymer particles embedded in a solid polymer matrix is investigated using Static Light Scattering and Scanning Electron Microscopy. The resulting SLS spectra are analyzed using the Percus-Yevick approximation in order to model interparticle interference effects. The estimated particle size distributions agree well with the measurements from SEM.

    10. Microsystems for Optical Cell Detection: Near versus Far Field (pages 92–98)

      Stefan Kostner and Michael J. Vellekoop

      Version of Record online: 20 MAR 2008 | DOI: 10.1002/ppsc.200700013

      A new system to characterize individual biological cells is introduced using near-field measurement. It is demonstrated that this system can provide measurements of size and shape as well as refractive index and absorption. Another low-cost setup is presented and the advantages and limitations of both systems are outlined.

    11. Routine Quality Testing of Blood Platelet Transfusions with Dynamic Light Scattering (pages 99–104)

      Elisabeth Maurer-Spurej, Audrey Labrie and Keddie Brown

      Version of Record online: 12 FEB 2008 | DOI: 10.1002/ppsc.200700017

      A new portable device is presented to measure the quality of blood platelet concentrates. The major challenges have been solved and the device can measure platelet size, number of platelet-derived microparticles, and the response of platelets to temperature changes, which are combined to calculate a platelet quality score.

  3. Calendar

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors
  4. Instructions for Authors

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors

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