Bio-syncretic tweezers actuated by microorganisms: modeling and analysis. Issue 36 (19th July 2016)

• Record Type: Journal Article
• Authors: Zhang, C.; Xie, S. X.; Wang, W. X.; Xi, N.; Wang, Y. C.; Liu, L. Q.
• Is Part Of: Soft matter. Volume 12:Issue 36(2016)
• Page Start: 7485
• Page End: 7494
• Publication Date: 2016-07-19
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c6sm01055e
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : Movement of micro-structures actuated by bio-syncretic tweezers: light-spot induced mode and geometric shape-induced mode. 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.