Light scattering by spherical two-layer particles of white pigments

The histone deacetylase inhibitor LBH589 inhibits expression of mitotic genes causing G2/M arrest and cell death in head and neck squamous cell carcinoma cell lines

“…In the development of commercial pigments, coated particles represent a step up in complexity and, in general, are therefore only applied where absolutely necessary. Common reasons for coating are for the protection of corrosion‐susceptible aluminum particles,60 to provide an interference color to flakes (see above), or even to reduce the usage of an expensive pigment by applying it onto the surface of cheap one 61. The latter case in fact motivated one of the first applications to colorant design of an extended form of the Lorenz‐Mie solution to a spherical core‐shell particle 16.…”

“…The latter case in fact motivated one of the first applications to colorant design of an extended form of the Lorenz‐Mie solution to a spherical core‐shell particle 16. Ironically, the target of the work in question was not to create a material with improved optical properties but rather maintain them whilst utilizing as thin a shell as possible 61. This approach was demonstrated for the case of a white pigment comprising a silica core surround by rutile (titanium dioxide).…”

Painting by Numbers: Nanoparticle‐Based Colorants in the Post‐Empirical Age

“…By converting the scattering effi ciency into an integral spectral K-M scattering coeffi cient it could be shown that when a core of radius R CO was coated with a layer with thickness H, a region (marked as C in Figure 7 a, left) defi ning suitable particle design parameters could be identifi ed. [ 61 ] A further interesting result which is insinuated, but apparently not followed up by Dotsenko and coworkers, is the fact that for certain particle geometries the scattering effi ciency is rather different than any that can be obtained with a pure rutile or silica particle (cf. middle and right-hand of Figure 7 a).…”

“…Common reasons for coating are for the protection of corrosion-susceptible aluminum particles, [ 60 ] to provide an interference color to fl akes (see above), or even to reduce the usage of an expensive pigment by applying it onto the surface of cheap one. [ 61 ] The latter case in fact motivated one of the fi rst applications to colorant design of an extended left). Nevertheless, a pigment with angular independent structural color could be recovered by grinding the powder with 1-8% carbon black (Figure 6 c, third left).…”

“…[ 16 ] Ironically, the target of the work in question was not to create a material with improved optical properties but rather maintain them whilst utilizing as thin a shell as possible. [ 61 ] This approach was demonstrated for the case of a white pigment comprising a silica core surround by rutile (titanium dioxide). By converting the scattering effi ciency into an integral spectral K-M scattering coeffi cient it could be shown that when a core of radius R CO was coated with a layer with thickness H, a region (marked as C in Figure 7 a, left) defi ning suitable particle design parameters could be identifi ed.…”