Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction

Abstract The beat in physical systems is a transparent and well-understood phenomenon. It may occur in forced oscillatory systems and as a result of the interference of two waves of slightly different frequencies. However, in chemical systems, the realization of the latter type of the beat phenomeno...

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Autores principales:	Hugh Shearer Lawson, Gábor Holló, Norbert Német, Satoshi Teraji, Hideyuki Nakanishi, Robert Horvath, István Lagzi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/57a921ea7f15431b91fdac11ff9421aa
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spelling	oai:doaj.org-article:57a921ea7f15431b91fdac11ff9421aa2021-12-02T15:00:51ZDesign of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction10.1038/s41598-021-90301-82045-2322https://doaj.org/article/57a921ea7f15431b91fdac11ff9421aa2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90301-8https://doaj.org/toc/2045-2322Abstract The beat in physical systems is a transparent and well-understood phenomenon. It may occur in forced oscillatory systems and as a result of the interference of two waves of slightly different frequencies. However, in chemical systems, the realization of the latter type of the beat phenomenon has been lacking. Here we show that a periodic titration of acid and alkaline solutions with each other using programmable syringe pumps in a continuous stirred-tank reactor exhibits the beat phenomenon in the temporal pH oscillation pattern if the time periods of sinusoidal inflow rates of the reagents are slightly different. Interestingly, the frequency of the chemical beat pattern follows the well-known relationship from physics, namely the frequency of the beat is equal to the absolute value of the difference of the two wave frequencies. Based on our strategy, we can design and engineer non-autonomous pH oscillatory systems, in which the characteristics of the temporal oscillations (amplitude, time period) can easily and precisely be controlled by the experimental conditions such as the inflow rates and feed concentrations. The demonstrated phenomena can be exploited in practical applications, we use the non-autonomous pH oscillators to drive the reversible assembly and disassembly of pH-sensitive building blocks (oleic acid and gold nanoparticles), both highly relevant in nanotechnology and biomedical applications.Hugh Shearer LawsonGábor HollóNorbert NémetSatoshi TerajiHideyuki NakanishiRobert HorvathIstván LagziNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hugh Shearer Lawson Gábor Holló Norbert Német Satoshi Teraji Hideyuki Nakanishi Robert Horvath István Lagzi Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction
description	Abstract The beat in physical systems is a transparent and well-understood phenomenon. It may occur in forced oscillatory systems and as a result of the interference of two waves of slightly different frequencies. However, in chemical systems, the realization of the latter type of the beat phenomenon has been lacking. Here we show that a periodic titration of acid and alkaline solutions with each other using programmable syringe pumps in a continuous stirred-tank reactor exhibits the beat phenomenon in the temporal pH oscillation pattern if the time periods of sinusoidal inflow rates of the reagents are slightly different. Interestingly, the frequency of the chemical beat pattern follows the well-known relationship from physics, namely the frequency of the beat is equal to the absolute value of the difference of the two wave frequencies. Based on our strategy, we can design and engineer non-autonomous pH oscillatory systems, in which the characteristics of the temporal oscillations (amplitude, time period) can easily and precisely be controlled by the experimental conditions such as the inflow rates and feed concentrations. The demonstrated phenomena can be exploited in practical applications, we use the non-autonomous pH oscillators to drive the reversible assembly and disassembly of pH-sensitive building blocks (oleic acid and gold nanoparticles), both highly relevant in nanotechnology and biomedical applications.
format	article
author	Hugh Shearer Lawson Gábor Holló Norbert Német Satoshi Teraji Hideyuki Nakanishi Robert Horvath István Lagzi
author_facet	Hugh Shearer Lawson Gábor Holló Norbert Német Satoshi Teraji Hideyuki Nakanishi Robert Horvath István Lagzi
author_sort	Hugh Shearer Lawson
title	Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction
title_short	Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction
title_full	Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction
title_fullStr	Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction
title_full_unstemmed	Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction
title_sort	design of non-autonomous ph oscillators and the existence of chemical beat phenomenon in a neutralization reaction
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/57a921ea7f15431b91fdac11ff9421aa
work_keys_str_mv	AT hughshearerlawson designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction AT gaborhollo designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction AT norbertnemet designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction AT satoshiteraji designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction AT hideyukinakanishi designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction AT roberthorvath designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction AT istvanlagzi designofnonautonomousphoscillatorsandtheexistenceofchemicalbeatphenomenoninaneutralizationreaction
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Design of non-autonomous pH oscillators and the existence of chemical beat phenomenon in a neutralization reaction

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