Switching between Two Oscillatory States Depending on the Electrical Potential

Autor:	Oliver Steinbock, Satoshi Nakata, Masakazu Kuze, Takashi Amemiya, Nobuhiko J. Suematsu, Mari Horisaka
Rok vydání:	2021
Předmět:	Bead (woodworking) Materials science Activator (phosphor) Materials Chemistry Traveling wave Electrical switching Physical and Theoretical Chemistry Molecular physics Surfaces Coatings and Films
Zdroj:	The Journal of Physical Chemistry B. 125:3638-3643
ISSN:	1520-5207 1520-6106
Popis:	Various spatiotemporal patterns were created on the surface or in the body of cation-exchange resin beads which were loaded with the catalyst of the Belousov-Zhabotinsky (BZ) reaction. Either global oscillations (GO) or traveling waves (TW) and the switching between them were observed in the previous papers, but it was not clear how chemicals contribute to the reaction inside/around the BZ bead. In this paper, we scanned the electrical potential, E, from +1 to -1 V (negative scan) and then turned from -1 to +1 V (positive scan) to control the switching between GO and TW. We found that the electrical switching potential from TW to GO, ETG, and from GO to TW, EGT, depended on the scanning direction of E and the diameter of the bead, d. The present study suggests that the electrode-induced increase of the inhibitor, Br-, and the activator, HBrO2, around the BZ bead plays an important role in determining ETG and EGT.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f043918bbdac590d7b7f87b5ad45c01 https://doi.org/10.1021/acs.jpcb.0c11019 Zobrazit plný text záznamu