Size-Dependent Multiple-Scattering Effects of Mesoporous TiO2 Beads Distinguished by Optical Coherence Tomography

Tsai, Ling-Hsuan; Yang, P. C.; Shih, Yu-Jen; Lin, King‐Fu; Wu, Chung‐Chih; Lin, Hoang Yang

doi:10.1109/jphot.2017.2734566

Cited by 1 publication

(1 citation statement)

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“…This result is ascribed to the light scattering effect of high-refractive index TiO 2 nanoparticles in the low-refractive index acrylate-based matrix. Notably, the thin films with large-sized TiO 2 nanoparticles (T2) showed much blurrier images than those with small TiO 2 (T1) [ 56 ]. Based on these results, thin films embedded with organic-inorganic hybrid particles are expected to have good light scattering characteristics comparable to those with only inorganic TiO 2 nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

Highly Scattering Hierarchical Porous Polymer Microspheres with a High-Refractive Index Inorganic Surface for a Soft-Focus Effect

Yoon

Lee²,

Lee³

et al. 2020

Polymers

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Functional light scattering materials have received considerable attention in various fields including cosmetics and optics. However, a conventional approach based on optically active inorganic materials requires considerable synthetic effort and complicated dispersion processes for special refractive materials. Here, we report a simple and effective fabrication strategy for highly scattering hierarchical porous polymer microspheres with a high-refractive index inorganic surface that mitigates the disadvantages of inorganic materials, producing organic-inorganic hybrid particles with an excellent soft-focus effect. Hierarchical organic-inorganic hybrid particles were synthesized using the simple physical mixing of porous poly (methyl methacrylate) (PMMA) microparticles with different pore sizes and regularities as the organic core and titanium dioxide (TiO2) nanoparticles with different particle sizes as the inorganic shell. The polar noncovalent interactions between polar PMMA microspheres and the polar surface of TiO2 nanoparticles could induce the hierarchical core-shell structure of hybrid particles. The synthesized hybrid particles had increased diffuse reflectance properties of up to 160% compared with single inorganic particles. In addition, the light scattering efficiency and soft-focus effect could be increased further, depending on the size of the TiO2 nanoparticles and the pore characteristics of the PMMA microspheres. The proposed study can provide a facile and versatile way to improve the light scattering performance for potential cosmetics.

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Section: Resultsmentioning

confidence: 99%