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

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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Abstract

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 3.0).
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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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