New features in the dynamics of a ferroin-catalyzed Belousov–Zhabotinsky reaction induced by a zwitterionic surfactant

Rossi, Federico; Varsalona, R.; Liveri, Maria Liria Turco

doi:10.1016/j.cplett.2008.08.082

Cited by 27 publications

(27 citation statements)

References 35 publications

(45 reference statements)

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“…Only the four droplets having the same boundary conditions (segmented square in Figure 8) were monitored during the simulations. The BZ system inside each droplet was modeled according to the following reaction scheme [28][29][30] with relative kinetic constants reported in Table 1.…”

Section: Acs Paragon Plus Environmentmentioning

confidence: 99%

Tuning the Chemical Communication of Oscillating Microdroplets by Means of Membrane Composition

et al. 2017

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Abstract:Synchronization of dynamic elements via chemical communication is a widespread phenomenon in nature, and hence in many scientific fields such as in biology, physics and chemistry, where systems capable of giving and receiving informationare commonly found. In these systems coupling and synchronization between elements is achieved by messenger molecules diffusing from one element to others which trigger and spread a chemical reaction. Herein, in a biomimetic approach, we used a microfluidic system to confine a "chemical information generator", consisting of the far-from-equilibrium Belousov-Zhabotinsky (BZ) reaction in the aqueous core of monodisperse simple emulsion microdroplets. These microdroplets were surrounded by an oil phase containing the phospholipid 1,2-dimyristoylsn-glycero-3-phosphocholine (DMPC), doped with other amphiphilic molecules. Stabilized by the lipids layer contained in the oil phase, the drops could be brought in closest contact to be arranged in a 1D array, using a microfluidic device. The as-formed lipid membrane, at the contact surface, provided a diffusion path between the drops for the chemical species governing the dynamical behavior of the BZ oscillating reaction. We showed, that the coupling mediated by the membranes had mostly an inhibitory character, and that the communication could be controlled by the insertion of sodium tetradecyl sulfate and cholesterol as membrane dopants.Numerical simulations suggested, that the hydrophobic properties and the lipid packing at the interface were of paramount importance for the trans-membrane crossing of the pertinent chemical species.

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Section: Acs Paragon Plus Environmentmentioning

confidence: 99%

Tuning the Chemical Communication of Oscillating Microdroplets by Means of Membrane Composition

et al. 2017

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“…No-flux boundary conditions are imposed at the borders of the spatial domain. We obtain numerically the concentration profiles C 1 (z, t) and C 2 (z, t) which are next used to reconstruct the related density profiles according to the state equation qðC 1 ; C 2 Þ ¼ q T ð1 þ a 1 ðC 1 À C T 1;0 Þ þ a 2 ðC 2 À C T 2;0 ÞÞ: (10) This expansion relies on the assumption that concentrations slightly change with respect to the initial composition of the reference top solution with density q T and we can then admit a linear dependence of the global density q upon the solute concentration. In Eq.…”

Section: Cross-diffusion Modelmentioning

confidence: 99%

“…The dynamics of the well known BZ 1,2 chemical oscillator, in particular, has been studied with many self-assembled matrices 3 and structured media 4 including gels and hydrogels, 5-8 micelles, [9][10][11][12][13][14] polymers, [15][16][17][18] and lipid vesicles and aggregates. [19][20][21][22][23][24] Particularly important from the pattern formation viewpoint, the AOT water-in-oil reverse MEs, are probably the most thoroughly studied system in combination with the BZ reaction.…”

Section: Introductionmentioning

confidence: 99%

Interfacial hydrodynamic instabilities driven by cross-diffusion in reverse microemulsions

Budroni

Landeira

Intiso

et al. 2015

Chaos: An Interdisciplinary Journal of Nonlinear Science

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When two microemulsions are put in contact in the gravity field along a horizontal contact line, cross-diffusion can trigger the transport of one species in the presence of a gradient in concentration of another species. We show here theoretically that such cross-diffusion effects can induce buoyancy-driven convective instabilities at the interface between two solutions of different compositions even when initially the less dense solution lies on top of the denser one. Two different sources of convective modes are identified depending whether positive or negative cross-diffusion is involved. We evidence the two predicted cross-diffusion driven instabilities experimentally using a two-layer stratification of Aerosol-OT (AOT) water-in-oil microemulsions solutions with different water or AOT composition.

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“…Even an addition of nonreacting chemical species induces effective changes in the pattern dynamics internally. For example, self‐assembled aggregates of surfactants have been employed to compartmentalize crucial intermediates to affect the temporal dynamics of the BZ reaction . The perturbation experiments often give a new insight about a reaction mechanism in addition to controllability of the pattern formation.…”

Section: Introductionmentioning

confidence: 99%

“…Surfactant‐forming micelles (direct and reverse) revealed to be very fascinating and promising due to their ability to selectively interact via electrostatic and/or hydrophobic interactions with the reaction substrates or products present in the medium . The works of Liveri et al and others have exhaustively demonstrated the effects of different types of self‐assembled additives such as surfactants and/or polymers on the oscillatory parameters of the BZ oscillatory reaction such as an induction period and oscillation time period . However, the literature has scarcely highlighted the role of mixed surfactant systems on the dynamics of the BZ oscillatory reaction.…”

Section: Introductionmentioning

confidence: 99%

Influence of Micellar Propinquity on Dynamics of Ce(IV)‐Catalyzed BZ Oscillatory Reaction under Stirred Conditions

Chat

Najar

Ashraf

et al. 2014

Int J of Chemical Kinetics

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Oscillating reactions often employed to mimic and understand complex dynamics in biological systems are known to be affected in aggregated host environments. The dynamic evolution of the oscillatory Belousov–Zhabotinsky (BZ) reaction upon addition of increasing amounts of anionic (sodium dodecylbenzenesulfonate; SDBS), cationic (hexadecyltrimethylammonium bromide; CTAB), nonionic (polyoxyethylene(20) cetyl ether; Brij58), and binary mixtures (CTAB + Brij58 and SDBS + Brij58) of surfactants was monitored using potentiometry at 25 and 35°C under stirred batch conditions. The experimental results reveal that the oscillatory parameters of the Ce(IV)‐catalyzed BZ reaction are significantly altered depending on the concentration and nature of restricted micellar host environments. In the presence of ionic surfactants, it is proposed that the evolution of the oscillatory BZ system may be due to atypical proficiency (related to hydrophobic and electrostatic interactions) of such organized self‐assemblies to affect the reactivity by selectively confiscating some key reacting species. However, the response of the BZ system to nonionic Brij58 was attributed to the reaction among the alcoholic functional groups of the surfactant with some vital species of the BZ reaction. Moreover, the nonionic + ionic binary surfactant systems exhibited behaviors representative of both the constitutive single surfactant systems.

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New features in the dynamics of a ferroin-catalyzed Belousov–Zhabotinsky reaction induced by a zwitterionic surfactant

Cited by 27 publications

References 35 publications

Tuning the Chemical Communication of Oscillating Microdroplets by Means of Membrane Composition

Tuning the Chemical Communication of Oscillating Microdroplets by Means of Membrane Composition

Interfacial hydrodynamic instabilities driven by cross-diffusion in reverse microemulsions

Influence of Micellar Propinquity on Dynamics of Ce(IV)‐Catalyzed BZ Oscillatory Reaction under Stirred Conditions

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