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Sensors 2014, 14(1), 1497-1510; doi:10.3390/s140101497

Autonomous Oscillation of Polymer Chains Induced by the Belousov–Zhabotinsky Reaction

*  and
Nanosystem Research Institute, NRI, National Institute of Advanced Science and Technology, AIST, Central 5-2, 1-1-1 Higashi, Tsukuba 305-8565, Japan
* Author to whom correspondence should be addressed.
Received: 9 October 2013 / Revised: 2 December 2013 / Accepted: 7 January 2014 / Published: 15 January 2014
(This article belongs to the Special Issue Polymeric Micro Sensors and Actuators)
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We investigated the self-oscillating behaviors of two types of polymer chains induced by the Belousov–Zhabotinsky (BZ) reaction. One consisted of N-isopropylacrylamide (NIPAAm) and the Ru catalyst of the BZ reaction, and the other consisted of NIPAAm, the Ru catalyst, and acrylamide-2-methylpropanesulfonic acid (AMPS) with a negatively charged domain as a solubility control site. A comparison of the two types of self-oscillation systems showed that the anionic AMPS portion of the polymer chain significantly affected the self-oscillating behavior under strongly acidic condition. The periods of self-oscillation for the two types of self-oscillating polymer chains were investigated by changing the initial concentrations of the three BZ substrates and the temperature. As a result, it was demonstrated that the period of self-oscillation could be controlled by the concentration of the BZ substrates and the temperature. Furthermore, the activation energies of the two types of the self-oscillating polymer chains gave similar values as normal BZ reactions, i.e., not including the self-oscillating polymer system with a Ru moiety. In addition, it was clarified the activation energy was hardly affected by the initial concentration of the three BZ substrates.
Keywords: self-oscillation; polymer chain; BZ reaction; molecular robot self-oscillation; polymer chain; BZ reaction; molecular robot
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Hara, Y.; Takenaka, Y. Autonomous Oscillation of Polymer Chains Induced by the Belousov–Zhabotinsky Reaction. Sensors 2014, 14, 1497-1510.

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