Monodisperse hollow silica spheres embedded in a PDMS matrix yield highly isotropic composites with tunable optical and acoustic properties. Their hollow structure enhances transparency by minimizing refractive index mismatch, while controlled filler content enables frequency-selective sound absorption. This study presents a strategy for designing multifunctional materials with structural isotropy and precisely tailored responses for optical and acoustic applications.
- Uiseok Hwang
- Jaeuk Sung
- Soochan Kim
