title: Discrete dipole moments and enhanced electro-rheological properties of dumbbell-shaped, non-spherical particles.
abstract: In this study, uniform dumbbell-shaped non-spherical particles are produced by seeded polymerization, and the electro-rheological (ER) properties are compared to those of spherical-shaped particles after surface coating with functionalized multiwall carbon nanotubes (f-MWCNTs). The non-spherical particles formed linear chains under an applied electric field. The yield stress of the non-spherical particles is five-times as high as that of the spherical particles. The enhanced ER properties of the dumbbell-shaped non-spherical particles are attributed to the discrete dipole moments, which are found to depend on the morphology.
authors.affiliation: Division of Chemical Engineering, College of Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors.forename: Kyomin
authors.initials: K
authors.lastname: Shin
authors.forename: Sunmi
authors.initials: S
authors.lastname: Lee
authors.forename: Jin-Joo
authors.initials: JJ
authors.lastname: Kim
authors.forename: Kyung-Do
authors.initials: KD
authors.lastname: Suh