Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 202, Issue -, Pages 301-306Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.05.068
Keywords
Micro-robot; Flagellated bacteria; Bacterial cellulose; MEMS; Microorganisms; Nanofibrous hydrogel
Funding
- JSPS KAKENHI [21226006]
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Micro-robots are of extreme interest for a wide range of applications. Examples include therapeutic applications inside of a living body and automatic untethered systems which work in microfluidic devices. Recently, flagellated bacteria have been employed as microactuators for the micro-robots. Here, we introduce bacterial cellulose (BC) as an effective support carrier for immobilizing flagellated bacteria. Experimental study revealed that the superiority of BC over conventional MEMS materials in immobilization. Next, a new microfabrication technique for forming conical-shaped BC is proposed. This technique achieved the untethered microstructure of BC with a help of oxygen concentration gradient. Finally, we demonstrate motile bacteria were successfully immobilized onto the BC structure to form a microbial-robot, which swam in culture media at an average speed of 4.8 mu m/s. (C) 2014 Elsevier B.V. All rights reserved.
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