Topics in Particle and Dispersion Science

Literature survey: 30 September 2007

• Light scattering and absorption by particles: Fundamental problems and models
  • Monte Carlo ray tracing simulations of light scattering by spherical clusters of large transparent particles: phase function tends to the isotropic function with the growth of the number of particles in the cluster from tens to thousands; polarimetric features weaken (Grynko Y and Shkuratov 2007)
  • Aggregation of particles causes a decrease of the amplitude of the oscillations in the phase function and reduces the magnitude of the negative branch of the degree of linear polarization (Hadamcik E et al 2007)
  • Light scattering by a nonspherical particle with a rough surface simulated with T-matrix: Surface roughness increases the magnitude of light scattering by metal particles and affects cross-polarization (Hellmers J and Wriedt 2007)
  • Circular polarization of light scattered by asymmetrical particles studied with T-matrix: Significant degree of circular polarization of single-scattered light by optically-inactive monodisperse asymmetrical particles in random orientations (Guirado D et al 2007)
  • Light scattering by a charged sphere: Slightly absorbing charged particles with relative size < 0.01 may reach attenuation efficiency more than 10 times greater than equivalent non-charged particles (Klačka J and Kocifaj 2007)
  • Coated particles
    • Enhancement of the light absorption efficiency and reduction in the light scattering efficiency of metal-coated fibers: Optimum coating thickness (Kleiman M et al 2007)
    • Light scattering by large (~100 µm) spheres with thin (< 1 µm) absorbing coat: Significant modification of the dependence of linear polarization on scattering angle (Lasue J et al 2007)
      See also linear polarization of light scattered by aggregates of small (~1 µm) coated particles to simulate optical properties of comets (Lasue J and Levasseur-Regourd 2006)
  • Plasmons
    • Spectrally-selective heating at surface plasmon resonances of metallic nanosized particles located at surfaces (Hawes EA et al 2007)
      See also: Seol Y et al 2006
    • Spectra of light scattering by gold nanoshells: Effects of polydispersity of the shell thickness and of reduced electron free path (Khlebtsov BN et al 2007b
    • Plasmon resonance in a silica/gold nanoshell: Sensitivity to local environment
    • Multipole plasmons in metal nanorods: Scaling and dependence on rod size, shape, orientation, and dielectric environment (Khlebtsov BN and Khlebtsov 2007b, Khlebtsov BN et al 2007a - gold nanorods)
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• Instrumentation
  • Sensors
    • Optical monitoring of binding of biomolecules onto functionalized surface of a silica/gold nanoshell by using localized plasmon resonance: The highest sensitivity is predicted at shell/radius ratios within the range 0.2–0.4 (Khlebtsov BN and Khlebtsov 2007a)
  • Light scattering and absorption measurements
    • Simultaneous measurement of Mueller matrix spectra at a range of wavelengths (Hagen N et al 2007)
    • Extending effective pathlength for absorption of light with an integrating sphere (Hawe E et al 2007b, 2007a)
    • Optical cavity phase shift attenuation meter with a LED light source and a 26 cm-long near-confocal cavity has a detection limit of ~4 × 10^-8 m (Kebabian PL et al 2007)
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• Material properties
  • Linear relationships between the refractive index and density in a wide wavelength range from ultraviolet to infrared (Kitamura N et al 2007)
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• Particle/cell/dispersion properties
  • Cell as a material: Cell structure and mechanical behavior (Kasza KE et al 2007)
  • Gravitational stability of suspensions of attractive colloidal particles: A quantitative model (Kim C et al 2007)
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• Particle size distribution (PSD)
  • Time-of-transition method
    • Particle size distribution of bubbles determined with a flying optical probe (Hu B et al 2007)
      See also Relationship between the chord length distribution and bubble size distribution: Hu B et al 2006
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• Particle/cell characterization
  • Optical methods
    • Single particles
      • Gold nanoparticles and aggregates above thin metallic film via scattering of the evanescent wave - the normalized scattering matrix element m₃₃ at 110° and 150° indicates the particle size, degree of aggregation, and distance over the substrate (Francoeur M et al 2007)
    • Tissue
      • Re-scattering of light by a cell examined with confocal microscopy can damage cells several cell diameters away (Dobrucki J et al 2007)
    • Dispersions
      • Viscosity-altering additives may affect nanoparticle sizing via dynamic light scattering (Fillafer C 2007)
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• Particle trapping and manipulation
  • Acoustical methods
    • Trapping, moving, and sorting millimeter-size particles with an acoutic needle (Hu J et al 2007)
  • Optical methods
    • Dependence of the trapping force for a microbubble in an optical trap on the bubble and trap beam diameter (Jones PH et al 2007)
    • Moving gold nanospheres with laser beams (Fedosov IV et al 2007b, 2007a)
      See also use of light scattering to move liquid
    • Long-range ordering of gold nanoparticles in methyl methacrylate (MMA) by laser irradiation (Harris N et al 2007)
    • Longitudal optical binding of Rayleigh particles in two counter-propagating incoherent Bessel beams: Stable configurations of the objects occur with a spatial period two times shorter than the wavelength of light in the medium (Karásek V and Zemánek 2007)
  • Other methods
    • Self-motile colloidal particles propelled by chemical reaction at their surfaces (Howse JR et al 2007)
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• Turbid media: Radiative transfer (RT) and optical properties
  • Depolarization of linearly and circularly polarized light in a turbid medium depends in a different way on the refractive index of the scatterers of different sizes (Ghosh N et al 2007)
  • Pulsed point light source in scattering medium: Bimodal photon distribution vs. time at a an irradiance detector for optical thickness, τ < ~100 becomes unimodal distribution only for τ greater than that (Kokhanenko GP 2007)
• Turbid media: Optical imaging
  • Statistical detection and imaging of objects in turbid media using ballistic and snake photons (Farsiu S et al 2007)
    See also: Range-gated imaging of objects in turbid media with
    • picoseconds-long light pulses (Zevallos ME et al 2007)
    • nanoseconds-long light pulses (for example, Fournier GR et al 1993)