Surface tensions of aqueous solutions containing sodium dodecyl sulfonate in equilibrium with dimethyl ether at elevated pressures

Jho, C; King, A. D.

doi:10.1016/0021-9797(79)90141-3

Cited by 4 publications

(2 citation statements)

References 30 publications

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“…Rather, the two components are in competition for available surface area. 34 Thus, for the CTAB data, in contrast to the other experiments, we do not account for gas adsorption in the corrected value of r crit reported in Table 1.…”

Section: Resultsmentioning

confidence: 97%

Electrochemistry of single nanobubbles. Estimating the critical size of bubble-forming nuclei for gas-evolving electrode reactions

et al. 2016

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In this article, we address the fundamental question: "What is the critical size of a single cluster of gas molecules that grows and becomes a stable (or continuously growing) gas bubble during gas evolving reactions?" Electrochemical reactions that produce dissolved gas molecules are ubiquitous in electrochemical technologies, e.g., water electrolysis, photoelectrochemistry, chlorine production, corrosion, and often lead to the formation of gaseous bubbles. Herein, we demonstrate that electrochemical measurements of the dissolved gas concentration, at the instant prior to nucleation of an individual nanobubble of H, N, or O at a Pt nanodisk electrode, can be analyzed using classical thermodynamic relationships (Henry's law and the Young-Laplace equation - including non-ideal corrections) to provide an estimate of the size of the gas bubble nucleus that grows into a stable bubble. We further demonstrate that this critical nucleus size is independent of the radius of the Pt nanodisk employed (<100 nm radius), and weakly dependent on the nature of the gas. For example, the measured critical surface concentration of H of ∼0.23 M at the instant of bubble formation corresponds to a critical H nucleus that has a radius of ∼3.6 nm, an internal pressure of ∼350 atm, and contains ∼1700 H molecules. The data are consistent with stochastic fluctuations in the density of dissolved gas, at or near the Pt/solution interface, controlling the rate of bubble nucleation. We discuss the growth of the nucleus as a diffusion-limited process and how that process is affected by proximity to an electrode producing ∼10 gas molecules per second. Our study demonstrates the advantages of studying a single-entity, i.e., an individual nanobubble, in understanding and quantifying complex physicochemical phenomena.

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Section: Resultsmentioning

confidence: 97%

Electrochemistry of single nanobubbles. Estimating the critical size of bubble-forming nuclei for gas-evolving electrode reactions

et al. 2016

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“…For a closely packed monolayer, nsv~0 = -Z(Aüa/i;J[n*X/(<X + n®üa)] The surface tension of an aqueous solution of sodium dodecane sulfonate (at concentrations both below and above the cmc) pressurized by the nominally "inert" gas dimethyl ether has been measured. 26 While both the ether and surfactant decrease the surface tension of the solution, the contributions are not additive, suggesting that the sulfonate anions and ether molecules compete for available area at the gas-liquid surface. Again, the "inert" gas is surface-active.…”

Section: Introductionmentioning

confidence: 99%

Pressure dependence of the interfacial tension between fluid phases. 2. Application to liquid-vapor interfaces and to interfaces of amphiphilic solutions

Turkevich¹,

Mann²

1990

Langmuir

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Interfacial tensions of n-hexane with aqueous solutions of sodium dodecyl sulfonate in equilibrium with dimethyl ether at elevated pressures

Jho

King

1981

Journal of Colloid and Interface Science

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Surface tensions of aqueous solutions containing sodium dodecyl sulfonate in equilibrium with dimethyl ether at elevated pressures

Cited by 4 publications

References 30 publications

Electrochemistry of single nanobubbles. Estimating the critical size of bubble-forming nuclei for gas-evolving electrode reactions

Electrochemistry of single nanobubbles. Estimating the critical size of bubble-forming nuclei for gas-evolving electrode reactions

Pressure dependence of the interfacial tension between fluid phases. 2. Application to liquid-vapor interfaces and to interfaces of amphiphilic solutions

Interfacial tensions of n-hexane with aqueous solutions of sodium dodecyl sulfonate in equilibrium with dimethyl ether at elevated pressures

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