title: Electrorheology of graphene oxide.
abstract: Novel polarizable graphene oxide (GO) particles with oxidized groups on their edge and basal planes were prepared by a modified Hummers method, and their electro-responsive electrorheological (ER) characteristics when dispersed in silicone oil were examined with and without an electric field applied. The fibrillation phenomenon of this GO-based electro-responsive fluid was also observed via an optical microscope under an applied electric field. Both flow curves and dielectric spectra of the ER fluid were measured using a rotational rheometer and a LCR meter, respectively. Its viscoelastic properties of both storage and loss moduli were also examined using a vertical oscillation rheometer equipped with a high voltage generator, finding that the GO-based smart ER system behaves as a viscoelastic material under an applied electric field.
authors.affiliation: Department of Polymer Science and Engineering, Inha University, Incheon 402-751, Korea.
authors.forename: Wen Ling
authors.initials: WL
authors.lastname: Zhang
authors.forename: Ying Dan
authors.initials: YD
authors.lastname: Liu
authors.forename: Hyoung Jin
authors.initials: HJ
authors.lastname: Choi
authors.forename: Sang Guk
authors.initials: SG
authors.lastname: Kim