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http://dx.doi.org/10.3795/KSME-B.2010.34.5.523

Motion of Microbeads Propelled by Bacterial Chemotaxis  

Kim, Dong-Wook (School of Mechanical and Aerospace Engineering, Seoul Nat'l Univ.)
Kim, Young-Won (BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace System, Seoul Nat'l Univ.)
Yoo, Jung-Yul (School of Mechanical and Aerospace Engineering, Seoul Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.5, 2010 , pp. 523-529 More about this Journal
Abstract
Recently, several research groups have been investigating the motion of flagellated bacteria, with the aim of examining the feasibility of using bacterial chemotaxis as an efficient power source for microactuators. In this study, microparticle-tracking velocimetry ($\mu$-PTV) is used for investigating the motion of fluorescent microbeads propelled by bacterial chemotaxis. Flagellated bacteria, Serratia marcescens, are spontaneously attached to the surface of the fluorescent polystyrene (PS) microbeads in an aqueous culture. The microbeads thus treated are injected into the test medium, which contains the solidified chemoattractant L-aspartate. With time, the particles slowly move toward the zone in which the L-aspartate concentration is high. This study shows that chemotaxis of flagellated bacteria can be applied as an efficient power source for microactuators.
Keywords
Bacterial Chemotaxis; Microbead; Microfluidic Platform; $\mu$-PTV;
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