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Krishna Mani S, Al-Tooqi S, Song J, Sapre A, Zarzar LD, Sen A. Dynamic Oscillation and Motion of Oil-in-Water Emulsion Droplets. Angew Chem Int Ed Engl 2024; 63:e202316242. [PMID: 37939352 DOI: 10.1002/anie.202316242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/06/2023] [Accepted: 11/08/2023] [Indexed: 11/10/2023]
Abstract
The interplay of interfacial tensions on droplets results in a range of self-powered motions that mimic those of living systems and serve as a tunable model to understand their complex non-equilibrium behavior. Spontaneous shape deformations and oscillations are crucial features observed in nature but difficult to incorporate in synthetic artificial systems. Here, we report sessile oil-in-water emulsions that exhibit rapid oscillating behavior. The oscillations depend on the nature and concentration of the surfactant, the chemical composition of the oil, and the wettability of the solid substrate. The rapid changes in the contact angle per oscillation are observed using side-view optical microscopy. We propose that the changes in the interfacial tension of the oil droplets is due to the partitioning of the surfactant into the oil phase and the movement of self-emulsified oil out of the parent droplets giving rise to the rhythmic variation in droplet contact-line. The ability to control and understand droplet oscillation can help model similar oscillations in out-of-equilibrium systems in nature and reproduce biomimetic behavior in artificial systems for various applications, such as microfluidic lab-on-a-chip and adaptive materials.
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Affiliation(s)
- Sanjana Krishna Mani
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Sulaiman Al-Tooqi
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Jiaqi Song
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
| | - Aditya Sapre
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Lauren D Zarzar
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Material Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Ayusman Sen
- Department of Chemistry, The Pennsylvania State University, University Park, PA 16802, USA
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
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Mikuchi Y, Yamashita H, Yamamoto D, Nawa-Okita E, Shioi A. Ionic Tuning of Droplet Motion on Water Surface. Front Chem 2019; 7:788. [PMID: 31803721 PMCID: PMC6877656 DOI: 10.3389/fchem.2019.00788] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 11/01/2019] [Indexed: 11/13/2022] Open
Abstract
Herein, the oscillation of an oil droplet on the surface of water is studied. The droplet contains an anionic surfactant that can react with the cations present in water. The oscillation starts after a random motion, and the oscillation pattern apparently depends on the cation species in the water phase. However, a common pattern is included. The cation species only affects the amplitude and frequency and sometimes perturbs the regular pattern owing to the instability at the oil/water interface. This common pattern is explained by a simple model that incorporates the surfactant transport from the droplet to the surrounding water surface. The dependency of the amplitude and frequency on cation species is expressed quantitatively by a single parameter, the product of the amplitude and square of frequency. This parameter depends on the cationic species and can be understood in terms of the spreading coefficient. The simple model successfully explains this dependency.
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Arai Y, Tsuruki Y, Isobe T, Nakajima A, Matsushita S. Spontaneous Interfacial Tension Changes at the Interface of Metal Chloride Nitrobenzene Solution and Aqueous Stearyltrimethylammonium Chloride Solution: the Role of Metal Ions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20160348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yuka Arai
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 S7-8, Ookayama, Meguro, Tokyo 152-8550
| | - Yuta Tsuruki
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 S7-8, Ookayama, Meguro, Tokyo 152-8550
| | - Toshihiro Isobe
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 S7-8, Ookayama, Meguro, Tokyo 152-8550
| | - Akira Nakajima
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 S7-8, Ookayama, Meguro, Tokyo 152-8550
| | - Sachiko Matsushita
- Department of Materials Science and Engineering, Tokyo Institute of Technology, 2-12-1 S7-8, Ookayama, Meguro, Tokyo 152-8550
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Effects of halide ions on the acceptor phase in spontaneous chemical oscillations in donor/membrane/acceptor systems. J Colloid Interface Sci 2016; 462:351-8. [DOI: 10.1016/j.jcis.2015.10.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 10/03/2015] [Accepted: 10/06/2015] [Indexed: 11/20/2022]
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Yasui D, Yamashita H, Yamamoto D, Shioi A. Cation-Dependent Emergence of Regular Motion of a Float. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11005-11011. [PMID: 26393274 DOI: 10.1021/acs.langmuir.5b03049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report a unique ion-dependent motion of a float at an oil/water interface. The type of motion depended on the cation species that was dissolved in the water. Irregular vibrations occurred when the water contained Ca(2+), back-and-forth motion occurred when the water contained Fe(2+), a type of motion intermediate between these occurred when the water contained Mn(2+), and intermittent long-distance travel occurred when the water contained Fe(3+). This is one of the simplest systems that can be used to show how macroscopic regular motion emerges depending on specific chemicals, which is one of the central issues in the study of biological and biomimetic motions.
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Affiliation(s)
- Daisuke Yasui
- Department of Chemical Engineering and Materials Science, Doshisha University , 1-3 Tatara Miyakodani, Kyoto 610-0321, Japan
| | - Hirofumi Yamashita
- Department of Chemical Engineering and Materials Science, Doshisha University , 1-3 Tatara Miyakodani, Kyoto 610-0321, Japan
| | - Daigo Yamamoto
- Department of Chemical Engineering and Materials Science, Doshisha University , 1-3 Tatara Miyakodani, Kyoto 610-0321, Japan
| | - Akihisa Shioi
- Department of Chemical Engineering and Materials Science, Doshisha University , 1-3 Tatara Miyakodani, Kyoto 610-0321, Japan
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Ban T, Nakata H. Metal-Ion-Dependent Motion of Self-Propelled Droplets Due to the Marangoni Effect. J Phys Chem B 2015; 119:7100-5. [DOI: 10.1021/acs.jpcb.5b02522] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Takahiko Ban
- Division of Chemical Engineering,
Department of Materials Engineering Science, Graduate School of Engineering
Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan
| | - Hiroki Nakata
- Division of Chemical Engineering,
Department of Materials Engineering Science, Graduate School of Engineering
Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka 560-8531, Japan
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Nagata S, Yamamoto D, Shioi A. Ion-Selective Oscillatory Wetting under a DC Electric Field. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2015. [DOI: 10.1252/jcej.14we126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shunya Nagata
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Daigo Yamamoto
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Akihisa Shioi
- Department of Chemical Engineering and Materials Science, Doshisha University
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Abstract
AbstractThree particular systems are considered where transfer of a surfactant across the interface between two immiscible liquids, water and oil, is accompanied by spontaneous oscillations of relaxation type with an abrupt decrease of interfacial tension followed by its gradual increase. These oscillations cannot be explained in the frameworks of linear stability analysis, because they are related to essentially non-linear effects. The oscillations characteristics depend on the properties of a surfactant (interfacial activity, solubility, partition coefficient, density difference between the surfactant solution and pure solvent), other solutes present in one or both liquid phases, and, usually, also on the system geometry. If the transferred surfactant is an ionic one, then, the oscillations of interfacial tension are synchronised with the oscillations of electric potential across the interface. The available hypothesis about oscillations mechanism are discussed, in particular, the model proposed recently for oscillations due to Marangoni instability by surfactant transfer from a point source located in one of the liquid bulk phases.
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Maki S, Yamamoto R, Yamamoto D, Shioi A. Ion-Selective Marangoni Instability of Oil/Water Interface under a DC Voltage. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2014. [DOI: 10.1246/bcsj.20140102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Syungo Maki
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Ryota Yamamoto
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Daigo Yamamoto
- Department of Chemical Engineering and Materials Science, Doshisha University
| | - Akihisa Shioi
- Department of Chemical Engineering and Materials Science, Doshisha University
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Lotfi M, Karbaschi M, Javadi A, Mucic N, Krägel J, Kovalchuk V, Rubio R, Fainerman V, Miller R. Dynamics of liquid interfaces under various types of external perturbations. Curr Opin Colloid Interface Sci 2014. [DOI: 10.1016/j.cocis.2014.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gassin PM, Champory R, Martin-Gassin G, Dufrêche JF, Diat O. Surfactant transfer across a water/oil interface: A diffusion/kinetics model for the interfacial tension evolution. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.08.053] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tsuruki Y, Yoneda S, Shibuya Y, Isobe T, Nakajima A, Matsushita S. Spontaneous interfacial tension changes at the interface of a ZnCl2 nitrobenzene solution and aqueous stearyltrimethylammonium chloride solution. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.03.052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
AbstractSystems far from equilibrium are able to self-organize and often demonstrate the formation of a large variety of dissipative structures. In systems with free liquid interfaces, self-organization is frequently associated with Marangoni instability. The development of solutal Marangoni instability can have specific features depending on the properties of adsorbed surfactant monolayer. Here we discuss a general approach to describe solutal Marangoni instability and review in details the recent experimental and theoretical results for a system where the specific properties of adsorbed layers are crucial for the observed dynamic regimes. In this system, Marangoni instability is a result of surfactant transfer from a small droplet located in the bulk of water to air/water interface. Various dynamic regimes, such as quasi-steady convection with a monotonous decrease of surface tension, spontaneous oscillations of surface tension, or their combination, are predicted by numerical simulations and observed experimentally. The particular dynamic regime and oscillation characteristics depend on the surfactant properties and the system aspect ratio.
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Miyaoka T, Nishimura J, Iida Y, Maki S, Shioi A. Ion-selective Marangoni instability--chemical sensing of specific cation for macroscopic movement. CHAOS (WOODBURY, N.Y.) 2012; 22:037111. [PMID: 23020502 DOI: 10.1063/1.4729142] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Spontaneous motion and tension oscillation of an oil/water interface responding to specific cation Ca(2+) or Fe(3+) were observed when the oil phase containing the anionic surfactant bis(2-ethylhexyl) phosphate came in contact with the cation-containing water. Both the dynamics were the results of Marangoni instability. Complex formation between the anionic surfactant and cation caused the instability. The results showing the level of cation extraction and degree of interfacial tension revealed that the surfactant-cation combination forms an oil-soluble complex with reduced surface activity. Brewster angle microscopy indicated that molecules of the complex tend to aggregate at the interface. This aggregation affected the desorption rate of the complex. We were able to generate ion-selective instability by imposing mechanical and electrochemical perturbations to the interface at equilibrium. The results from these efforts suggested that the aggregation is a type of thermodynamic transition and is required for the onset of instability: Desorption probably occurs as an exfoliation of the aggregated complex, which generates the gradient of interfacial tension. For the standard experiment of biphasic contact, two neighboring interfacial flows compress the local interface between them. We considered that this compression provides mechanical work to the local interface, resulting in desorption of the aggregates and occurrence of instability. Both complex formation and aggregation are possible in the presence of the specific cation. The interface detects the cation via the chemical and thermodynamic processes in order to develop the macroscopic movement, a form of biomimetic motion of the oil/water interface.
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Affiliation(s)
- Tetsuya Miyaoka
- Department of Chemical Engineering & Materials Science, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321, Japan
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