Highly Transparent and Wide Viewing Optical Films Using Embedded Hierarchical Double-Shell Layered Nanoparticles with Gradient Refractive Index Surface

ACS Applied Materials & Interfaces
Intae Son, Jun Hyup Lee

Abstract

The essential improvements in the performance of light-diffusing materials for wide viewing angles in potential optoelectronic applications have attracted considerable attention. In this study, a simple and unprecedented strategy is proposed to simultaneously provide exceptional light scattering performance and high optical transparency for transparent optical thin films using hierarchical double-shell nanoparticles possessing a refractive index gradient on the nanoparticle surface. The hierarchical SiO2/TiO2/poly(methyl methacrylate) (PMMA) double-shell layered nanoparticles induce enhanced light scattering properties by their nanolayered gradient refractive index structure. Fourier transform infrared spectroscopy and scanning electron microscopy-energy-dispersive X-ray spectroscopy analyses show the successful formation of the multiple nanolayered structure of the double-shell nanoparticles. The synthesized SiO2/TiO2/PMMA nanoparticles with a diameter of 40 nm and a TiO2 layer thickness of 4.5 nm exhibit the highest diffuse reflectance of 87% in the visible region. An ultraviolet-light-cured optical film with an extremely low content of double-shell nanoparticles exhibits efficient light scattering characteristics while maint...Continue Reading

References

Apr 22, 2017·Scientific Reports·Julia SyurikHendrik Hölscher
Jul 16, 2019·Journal of Colloid and Interface Science·Irem B UstunolVicki H Grassian

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