title: Bio-syncretic tweezers actuated by microorganisms: modeling and analysis.
abstract: Advancements in micro-/nano-technology have led to the development of micro-manipulators. However, some challenges remain; for instance, the efficiency, precision and flexibility of micro-manipulators restrain their applications. This paper proposes a bio-tweezer system to flexibly manipulate micro-objects with bio-actuation via local light-induced high-concentration microorganisms in two different manipulation modes: light-spot induced mode and geometric shape-induced mode. Depending on the shape of micro-objects, either 2-dimensional translation or 1-dimensional rotation can be achieved. Based on the Langevin equation, a mathematical model considering both hydrodynamics and mimicked Brownian motion is proposed to analyze the bio-manipulation performance of the microorganisms; the model was validated by experiments to translate micro-particles in a two-dimensional plane and to rotate a micro-gear structure around its axis. This paper will aid in the development of micro-manipulators and the quantitative understanding of micro-/nano-manipulation actuated by microorganisms.
authors.affiliation: State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Science, Shenyang, 10016, China. wangwenxue@sia.cn lqliu@sia.cn.
authors.forename: C
authors.initials: C
authors.lastname: Zhang
authors.forename: S X
authors.initials: SX
authors.lastname: Xie
authors.forename: W X
authors.initials: WX
authors.lastname: Wang
authors.forename: N
authors.initials: N
authors.lastname: Xi
authors.forename: Y C
authors.initials: YC
authors.lastname: Wang
authors.forename: L Q
authors.initials: LQ
authors.lastname: Liu
mesh_terms: D001696:Biomechanical Phenomena; D057446:Hydrodynamics; D058086:Microalgae / Q000502:physiology*; D008846:Micromanipulation / Q000295:instrumentation*; D008962:Models, Theoretical; D012399:Rotation