Gali, MA & Arnold, MD 2019, 'Recurrent approach to effective material properties with application to anisotropic binarized random fields', PHYSICAL REVIEW B, vol. 99, no. 5.View/Download from: UTS OPUS or Publisher's site
Previdi, R, Levchenko, I, Arnold, M, Gali, M, Bazaka, K, Xu, S, Ostrikov, KK, Bray, K, Jin, D & Fang, J 2019, 'Plasmonic platform based on nanoporous alumina membranes: order control via self-assembly', JOURNAL OF MATERIALS CHEMISTRY A, vol. 7, no. 16, pp. 9565-9577.View/Download from: Publisher's site
Gali, MA, Gentle, AR, Arnold, MD & Smith, GB 2017, 'Extending the applicability of the four-flux radiative transfer method.', Applied Optics, vol. 56, no. 31, pp. 8699-8709.View/Download from: UTS OPUS or Publisher's site
A generalized four-flux method capable of modeling and tuning the spectral reflectance of a diverse range of complex composite coatings is presented. An example application is exploring and maximizing the visible and near-infrared (IR) spectral reflectance available from the diverse structures arising from combinations of the many practical paint ingredients that are available or can be made when applied to different substrates. This requires consideration of scatterers that can differ in composition, particle size, size distribution, and fill factor, and are held in place by a variety of organic binders, which typically partially absorb in the near IR. This extended model is further enhanced by an explicit matrix algorithm that allows analysis of diverse multilayer stacks. This is applied to a multilayer and is designed to model useful changes that result from varying the pigment fill factor as a function of depth within a layer. What we believe is a novel feature is the way the scattering affects matrix absorptance. The model includes contributions to total absorptance from the scattering pigments and from the paint binder that can arise in different bands or simultaneously at the same wavelengths. Model accuracy is demonstrated by example results when compared to experimental data on dried single layer paint profiles using imaged cross sections. The model input covering the actual pigment and binder properties used are material, shape, size, and size distributions, mass added, and the measured optical constants from 400 nm to 2,500 nm of the undoped binder resin layer. One interesting result is the comparison of a two-layered stack, with bigger particles in the first layer and smaller ones in the second, to one with the opposite depth profile.
Gali, MA, Arnold, MD, Gentle, AR & Smith, GB 2017, 'Super-cool paints: Optimizing composition with a modified four-flux model', Proceedings of SPIE - The International Society for Optical Engineering.View/Download from: Publisher's site
© 2017 SPIE. The scope for maximizing the albedo of a painted surface to produce low cost new and retro-fitted super-cool roofing is explored systematically. The aim is easy to apply, low cost paint formulations yielding albedos in the range 0.90 to 0.95. This requires raising the near-infrared (NIR) spectral reflectance into this range, while not reducing the more easily obtained high visible reflectance values. Our modified version of the four-flux method has enabled results on more complex composites. Key parameters to be optimized include; fill factors, particle size and material, using more than one mean size, thickness, substrate and binder materials. The model used is a variation of the classical four-flux method that solves the energy transfer problem through four balance differential equations. We use a different approach to the characteristic parameters to define the absorptance and scattering of the complete composite. This generalization allows extension to inclusion of size dispersion of the pigment particle and various binder resins, including those most commonly in use based on acrylics. Thus, the pigment scattering model has to take account of the matrix having loss in the NIR. A paint ranking index aimed specifically at separating paints with albedo above 0.80 is introduced representing the fraction of time at a sub-ambient temperature.
Gali, MA, Tai, MC, Arnold, MD, Cortie, MB, Gentle, AR & Smith, GB 2015, 'Plasmonic response in nanoporous metal: dependence on network topology', MICRO+NANO MATERIALS, DEVICES, AND SYSTEMS, SPIE Conference on Micro+Nano Materials, Devices, and Systems, SPIE-INT SOC OPTICAL ENGINEERING, Sydney, AUSTRALIA.View/Download from: UTS OPUS or Publisher's site