title: Effect of initial substrate concentration of the Belousov-Zhabotinsky reaction on self-oscillation for microgel system.
abstract: Self-oscillation for the microgel particles ( approximately 200 nm in diameter) was studied by changing initial substrate concentrations (i.e., malonic acid, sodium bromate, and nitric acid) of the Belousov-Zhabotinsky (BZ) reaction that is used for chemical energy for the self-oscillation. The cross-linked microgels are composed of N-isopropylacrylamide and ruthenium tris(2,2'-bipyridine), Ru(bpy) 3, which is a catalyst for the BZ reaction. Comparing with the homogeneous, stirred solution of the bulk solution for the BZ reaction, swelling/deswelling oscillation of the microgels showed longer induction period, different dependence of initial substrate concentrations on oscillation period, and different oscillation rhythm. The change in oscillation for the microgels can be understood by considering the microgel network effect.
authors.affiliation: Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Suzuki
authors.forename: Ryo
authors.initials: R
authors.lastname: Yoshida
mesh_terms: D005782:Gels / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D017975:Ruthenium Compounds / Q000737:chemistry; D012996:Solutions
chemical_list: D005782:Gels; D017975:Ruthenium Compounds; D012996:Solutions