title: Evolved Colloidosomes Undergoing Cell-like Autonomous Shape Oscillations with Buckling.
abstract: In living systems, there are many autonomous and oscillatory phenomena to sustain life, such as heart contractions and breathing. At the microscopic level, oscillatory shape deformations of cells are often observed in dynamic behaviors during cell migration and morphogenesis. In many cases, oscillatory behaviors of cells are not simplistic but complex with diverse deformations. So far, we have succeeded in developing self-oscillating polymers and gels, but complex oscillatory behaviors mimicking those of living cells have yet to be reproduced. Herein, we report a cell-like hollow sphere composed of self-oscillating microgels, that is, a colloidosome, that exhibits drastic shape oscillation in addition to swelling/deswelling oscillations driven by an oscillatory reaction. The resulting oscillatory profile waveform becomes markedly more complex than a conventional one. Especially for larger colloidosomes, multiple buckling and moving buckling points are observed to be analogous to cells.
authors.affiliation: Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
authors.forename: Ryota
authors.initials: R
authors.lastname: Tamate
authors.affiliation: Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan. ueki@cross.t.u-tokyo.ac.jp.|National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan. ueki@cross.t.u-tokyo.ac.jp.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Ueki
authors.affiliation: Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan. ryo@cross.t.u-tokyo.ac.jp.
authors.forename: Ryo
authors.initials: R
authors.lastname: Yoshida
mesh_terms: D058045:Artificial Cells / Q000737:chemistry / Q000166:cytology*; D040761:Biomimetic Materials / Q000737:chemistry*; D032701:Biomimetics / Q000379:methods; D048430:Cell Shape; D003102:Colloids / Q000737:chemistry*; D005782:Gels / Q000737:chemistry*; D010507:Periodicity; D011108:Polymers / Q000737:chemistry*
chemical_list: D003102:Colloids; D005782:Gels; D011108:Polymers
keywords: artificial cells; colloidosomes; gels; oscillatory chemical reactions; ruthenium