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Chemotactic behavior and dynamics of bacteria propelled microbeads

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3 Author(s)
Kim, Dongwook ; Dept. of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213 USA ; Liu, Albert ; Stitti, Metin

Flagellated bacteria have been well understood in regards to its adhesion to surfaces and in swimming propulsion. However, its ability to be used as a source of propulsion for artificial microsystems is of great interest to the micro-robotics community; its high efficiency in converting chemical energy to motion is highly attractive for microsystems that demand a low payload and high rate of actuation. In this paper, we describe the behavior of Serratia marcescens bacteria-propelled polystyrene beads in the presence of a chemoattractant, L-threonine. We compare the results of this chemotactic behavior to that bacteria-propelled bead without a chemoattractant. The results from this analysis indicate a clear sign of directionality, as well as an improved bead velocity, for the bacteria-attached microbeads in the presence of a chemoattractant.

Published in:

Intelligent Robots and Systems (IROS), 2011 IEEE/RSJ International Conference on

Date of Conference:

25-30 Sept. 2011

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