Fabrication of sub-micrometer-sized jingle bell-shaped hollow spheres from multilayered core-shell particles.
Jingle bell-shaped hollow spheres were fabricated starting from multilayered particles composed of a silica core, a polystyrene inner shell, and a titania outer shell. Composite particles of silica core-polystyrene shell, synthesized by coating a 339-nm-sized silica core with a polystyrene shell of thickness 238 nm in emulsion polymerization, were used as core particles for a succeeding titania-coating. A sol-gel method was employed to form the titania outer shell with a thickness of 37 nm. The inner polystyrene shell in the multilayered particles was removed by immersing them in tetrahydrofuran. These successive procedures could produce jingle bell-shaped hollow spheres that contained a silica core in the titania shell.
Gu
Shunchao
S
Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 07 Aoba, Aramaki-aza, Aoba-ku, Sendai 980-8579, Japan.
Kondo
Tomohiro
T
Mine
Eiichi
E
Nagao
Daisuke
D
Kobayashi
Yoshio
Y
Konno
Mikio
M