• Corpus ID: 238583264

Characterization of golden vaterite by the extended Maxwell Garnett formalism

  title={Characterization of golden vaterite by the extended Maxwell Garnett formalism},
  author={Tom G. Mackay and Akhlesh Lakhtakia},
The homogenization of vaterite impregnated with gold nanoparticles was accomplished using the extended Maxwell Garnett formalism. The extended formalism takes into account the intrinsic anisotropy of vaterite as well as the size, shape, and orientation of the nanoparticles. Size-dependent permittivity was used for the gold nanoparticles. Numerical studies revealed that the homogenized composite material’s permittivity parameters are acutely sensitive to the size, shape, orientation, and volume… 

Figures from this paper


On the extended Maxwell-Garnett and the extended Bruggeman approaches for dielectric-in-dielectric composites
The Bruggeman formula for dielectric-in-dielectric composites has been extended to include the size parameter. Comparison has been made with the similar extension of the Maxwell-Garnett formula. In
On extended homogenization formalisms for nanocomposites
In a long wavelength regime, the effective properties of particulate composites, including nanocomposites, may be estimated using one of various homogenization formalisms, such as the Bruggeman and
Homogenization and optical response properties of sculptured thin films
The concept of nanoscopic-to-macroscopic homogenization of a sculptured thin film (STF) into a unidirectionally nonhomogeneous continuum is presented. The global constitutive properties of linear
Size-dependent Maxwell-Garnett formula from an integral equation formalism
A simple but enhance Maxwell-Garnett formula for dielectric-in-deelectric composites has been derived directly from the Maxwell curl postulates through an integral equation formalism. The effective
Depolarization regions of nonzero volume in bianisotropic homogenized composites
In conventional approaches to the homogenization of random particulate composites, the component phase particles are often treated mathematically as vanishingly small, point-like entities. The
Depolarization volume and correlation length in the homogenization of anisotropic dielectric composites
Abstract In conventional approaches to the homogenization of random particulate composites, both the distribution and size of the component phase particles are often inadequately taken into account.
Formation Mechanism of CaCO 3 Spherulites in the Myostracum Layer of Limpet Shells
CaCO3 spherulites were found in the myostracum layer of common limpet shells collected from East Sands, St Andrews, Scotland. Their microstructures were revealed by using powder X-ray diffraction,
Dielectric Function for Gold in Plasmonics Applications: Size Dependence of Plasmon Resonance Frequencies and Damping Rates for Nanospheres
The improved, simple dielectric function for gold is given which accounts for the frequency dependence of the interband transitions over 1.8 eV and, in addition, for the finite size effects in gold nanoparticles.
Golden Vaterite as a Mesoscopic Metamaterial for Biophotonic Applications.
It is shown that the controllable infusion of gold nanoseeds into polycrystalline sub-micrometer vaterite spherulites gives rise to a variety of electric and magnetic Mie resonances, producing a tuneable mesoscopic optical metamaterial.
Electromagnetic depolarization dyadics and elliptic integrals
Depolarization dyadics are essential for the characterization of electromagnetic fields in source regions. As such they are key ingredients in the formulation of homogenization theories of composite