Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 3501-3509 |
| Number of pages | 9 |
| Journal | Applied Optics |
| Volume | 45 |
| Issue number | 15 |
| DOIs | |
| Publication status | Published - 2006 |
| MoE publication type | A1 Journal article-refereed |
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Light-scattering efficiency of starch acetate pigments as a function of size and packing density. / Penttilä, Antti; Lumme, Kari; Kuutti, Lauri.
In: Applied Optics, Vol. 45, No. 15, 2006, p. 3501-3509.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Light-scattering efficiency of starch acetate pigments as a function of size and packing density
AU - Penttilä, Antti
AU - Lumme, Kari
AU - Kuutti, Lauri
PY - 2006
Y1 - 2006
N2 - We study theoretically the light-scattering efficiency of paper coatings made of starch acetate pigments. For the light-scattering code we use a discrete dipole approximation method. The coating layer is assumed to consists of roughly equal-sized spherical pigments packed either at a packing density of 50% (large cylindrical slabs) or at 37% or 57% (large spheres). Because the scanning electron microscope images of starch acetate samples show either a particulate or a porous structure, we model the coatings in two complementary ways. The material can be either inside the constituent spheres (particulate case) or outside of those (cheeselike, porous medium). For the packing of our spheres we use either a simulated annealing or a dropping code. We can estimate, among other things, that the ideal sphere diameter is in the range 0.25–0.4 μm.
AB - We study theoretically the light-scattering efficiency of paper coatings made of starch acetate pigments. For the light-scattering code we use a discrete dipole approximation method. The coating layer is assumed to consists of roughly equal-sized spherical pigments packed either at a packing density of 50% (large cylindrical slabs) or at 37% or 57% (large spheres). Because the scanning electron microscope images of starch acetate samples show either a particulate or a porous structure, we model the coatings in two complementary ways. The material can be either inside the constituent spheres (particulate case) or outside of those (cheeselike, porous medium). For the packing of our spheres we use either a simulated annealing or a dropping code. We can estimate, among other things, that the ideal sphere diameter is in the range 0.25–0.4 μm.
U2 - 10.1364/AO.45.003501
DO - 10.1364/AO.45.003501
M3 - Article
VL - 45
SP - 3501
EP - 3509
JO - Applied Optics
JF - Applied Optics
SN - 1559-128X
IS - 15
ER -