201
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Wu Q, Yang C, Liu G, Xu W, Zhu Z, Si T, Xu RX. Multiplex coaxial flow focusing for producing multicompartment Janus microcapsules with tunable material compositions and structural characteristics. LAB ON A CHIP 2017; 17:3168-3175. [PMID: 28812769 DOI: 10.1039/c7lc00769h] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We propose a simple but efficient multiplex coaxial flow focusing (MCFF) process for single-step fabrication of multicompartment Janus microcapsules (MJMs) in a wide range of operating parameters. The produced MJMs consist of a multicompartmental core-shell structure with material compositions tunable in individual shell and core compartments. Potential applications of such a MJM agent are demonstrated in both benchtop and in vitro experiments. For the benchtop experiment, magnetic nanoparticles are loaded into one of the shell compartments and photopolymerized under ultraviolet light for controlled alignment and rotation of the microcapsules in a magnetic field. For the in vitro experiment, four different types of cells are encapsulated in the desired compartments of sodium alginate MJMs and co-cultured for seven days. By increasing the number of coaxial needles, we are also able to produce MJMs with three or more compartments. Our studies have shown that the proposed MCFF process is able to produce MJMs with desired material compositions and narrow size distribution. This process is inexpensive and scalable for mass production of various MJMs in its potential applications in biomedical imaging, drug delivery, and regenerative medicine.
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Affiliation(s)
- Qiang Wu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, PR China
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202
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203
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Zaheer MA, Zill JC, Matysik J, Gläser R, Dvoyashkin M. In Situ and in Operando Characterization of Mixing Dynamics in Liquid-Phase Reactions by 129
Xe NMR Spectroscopy. Chemphyschem 2017; 18:1513-1516. [DOI: 10.1002/cphc.201700080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/02/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Muhammad A. Zaheer
- Institute of Chemical Technology; Universität Leipzig; 04103 Leipzig Germany
| | - Jeremias C. Zill
- Institute of Analytical Chemistry; Universität Leipzig; 04103 Leipzig Germany
| | - Jörg Matysik
- Institute of Analytical Chemistry; Universität Leipzig; 04103 Leipzig Germany
| | - Roger Gläser
- Institute of Chemical Technology; Universität Leipzig; 04103 Leipzig Germany
| | - Muslim Dvoyashkin
- Institute of Chemical Technology; Universität Leipzig; 04103 Leipzig Germany
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204
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Wei D, Ge L, Lu S, Li J, Guo R. Janus Particles Templated by Janus Emulsions and Application as a Pickering Emulsifier. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5819-5828. [PMID: 28541052 DOI: 10.1021/acs.langmuir.7b00939] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
One-step vibrational mixing has afforded the batch-scale preparation of a Janus emulsion. The fabrication of Janus particles (JPs) templated by Janus emulsions was motivated by the topology and composition of the Janus droplets being highly tunable and controllable. Two immiscible polymerizable monomers were introduced as inner phases of the Janus emulsion. The advanced geometry of the resultant JPs was easily and precisely controlled from "snowman" to "dumbbell" by adjusting the mass ratio of two oils in the initial emulsion. The surface coverage of one lobe to the other was tuned by adjusting the mass ratio of mixed surfactants. Moreover, the size of JPs was able to be extended continuously from hundreds of micrometers to a few hundred nanometers while their morphologies remained within this wide size range. The proposed strategy is a universal technique in the synthesis of a family of composite polymeric JPs with both chemical and shape anisotropy. In addition, the as-generated chemically biphasic JPs were applied as emulsifiers to stabilize Pickering emulsions, and more attractively, emulsion inversion was readily achieved by choosing JPs with different morphologies.
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Affiliation(s)
- Duo Wei
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Lingling Ge
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Shuhui Lu
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Jingjing Li
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
| | - Rong Guo
- School of Chemistry and Chemical Engineering and ‡Testing Center, Yangzhou University , Yangzhou 225009, China
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205
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Separation of Janus droplets and oil droplets in microchannels by wall-induced dielectrophoresis. J Chromatogr A 2017; 1501:151-160. [DOI: 10.1016/j.chroma.2017.04.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 04/09/2017] [Accepted: 04/11/2017] [Indexed: 01/21/2023]
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206
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Rumble KA, Stoev ID, French DJ, Abou-Hassan A, Clegg PS. Sprouting Droplets Driven by Physical Effects Alone. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:4235-4241. [PMID: 28409928 DOI: 10.1021/acs.langmuir.6b04514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Combining a partially miscible three-liquid system with interfacially trapped silica colloids, we show that small droplets can exhibit dramatic growth phenomena driven by physical effects alone. The mass dense droplets sprout tubes which grow vertically upward in a gravitational field and respond to the presence of other droplets in their path. Two of the liquids in our system are water and toluene. By varying the third liquid, we are able to relate the growth behavior to the details of the underlying three-fluid phase diagram and the changes to the interfacial tension. Additionally, we introduce a pendant drop in the path of our growing drop. We use this to confirm that growth is driven by the partitioning of solvents, that exchange of solvents between droplets is chemically selective, and that the exchange behavior can itself generate further growth phenomena.
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Affiliation(s)
- Katherine A Rumble
- School of Physics and Astronomy, University of Edinburgh , Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Iliya D Stoev
- School of Physics and Astronomy, University of Edinburgh , Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - David J French
- School of Physics and Astronomy, University of Edinburgh , Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
| | - Ali Abou-Hassan
- Sorbonne Universités, UPMC Université Paris 06 , Laboratoire Physico-chimie des Electrolytes et Nanosystémes Interfaciaux (PHENIX), UMR 8234 CNRS, 4 Place Jussieu, Case 51, F-75005 Paris, France
| | - Paul S Clegg
- School of Physics and Astronomy, University of Edinburgh , Peter Guthrie Tait Road, Edinburgh EH9 3FD, United Kingdom
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207
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Fabrication of hollow polymer particles using emulsions of hydrocarbon oil/fluorocarbon oil/aqueous surfactant solution. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.02.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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208
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Zhang Q, Savagatrup S, Kaplonek P, Seeberger PH, Swager TM. Janus Emulsions for the Detection of Bacteria. ACS CENTRAL SCIENCE 2017; 3:309-313. [PMID: 28470048 PMCID: PMC5408331 DOI: 10.1021/acscentsci.7b00021] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Indexed: 05/05/2023]
Abstract
Janus emulsion assays that rely on carbohydrate-lectin binding for the detection of Escherichia coli bacteria are described. Surfactants containing mannose are self-assembled at the surface of Janus droplets to produce particles with lectin binding sites. Janus droplets orient in a vertical direction as a result of the difference in densities between the hydrocarbon and fluorocarbon solvents. Binding of lectin to mannose(s) causes agglutination and a tilted geometry. The distinct optical difference between naturally aligned and agglutinated Janus droplets produces signals that can be detected quantitatively. The Janus emulsion assay sensitively and selectively binds to E. coli at 104 cfu/mL and can be easily prepared with long-time stability. It provides the basis for the development of inexpensive portable devices for fast, on-site pathogen detection.
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Affiliation(s)
- Qifan Zhang
- Department
of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Suchol Savagatrup
- Department
of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Paulina Kaplonek
- Department
of Biomolecular Systems, Max Planck Institute
of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Free University
Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Peter H. Seeberger
- Department
of Biomolecular Systems, Max Planck Institute
of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
- Institute
of Chemistry and Biochemistry, Free University
Berlin, Arnimallee 22, 14195 Berlin, Germany
- E-mail:
| | - Timothy M. Swager
- Department
of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
- E-mail:
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209
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Guo P, Zeng C, Wang C, Zhang L. Magnetic ionic liquid‐water Janus droplets: Preparation, structure and morphology adjustment and magnetic manipulation. AIChE J 2017. [DOI: 10.1002/aic.15672] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Peng Guo
- The State Key Laboratory of Materials‐Oriented Chemical Engineering and College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing210009 P.R. China
| | - Changfeng Zeng
- College of Mechanical and Power EngineeringNanjing Tech UniversityNo. 5 Xin Mofan RdNanjing210009 P.R. China
| | - Chongqing Wang
- The State Key Laboratory of Materials‐Oriented Chemical Engineering and College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing210009 P.R. China
| | - Lixiong Zhang
- The State Key Laboratory of Materials‐Oriented Chemical Engineering and College of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing210009 P.R. China
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210
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Optical visualization and quantification of enzyme activity using dynamic droplet lenses. Proc Natl Acad Sci U S A 2017; 114:3821-3825. [PMID: 28348236 DOI: 10.1073/pnas.1618807114] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
In this paper, we describe an approach to measuring enzyme activity based on the reconfiguration of complex emulsions. Changes in the morphology of these complex emulsions, driven by enzyme-responsive surfactants, modulate the transmission of light through a sample. Through this method we demonstrate how simple photodetector measurements may be used to monitor enzyme kinetics. This approach is validated by quantitative measurements of enzyme activity for three different classes of enzymes (amylase, lipase, and sulfatase), relying on two distinct mechanisms for coupling droplet morphology to enzyme activity (host-guest interactions with uncaging and molecular cleavage).
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211
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Reconfigurable and responsive droplet-based compound micro-lenses. Nat Commun 2017; 8:14673. [PMID: 28266505 PMCID: PMC5344304 DOI: 10.1038/ncomms14673] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2016] [Accepted: 01/23/2017] [Indexed: 11/25/2022] Open
Abstract
Micro-scale optical components play a crucial role in imaging and display technology, biosensing, beam shaping, optical switching, wavefront-analysis, and device miniaturization. Herein, we demonstrate liquid compound micro-lenses with dynamically tunable focal lengths. We employ bi-phase emulsion droplets fabricated from immiscible hydrocarbon and fluorocarbon liquids to form responsive micro-lenses that can be reconfigured to focus or scatter light, form real or virtual images, and display variable focal lengths. Experimental demonstrations of dynamic refractive control are complemented by theoretical analysis and wave-optical modelling. Additionally, we provide evidence of the micro-lenses' functionality for two potential applications—integral micro-scale imaging devices and light field display technology—thereby demonstrating both the fundamental characteristics and the promising opportunities for fluid-based dynamic refractive micro-scale compound lenses. Micro-lenses are critical components in miniaturized optical devices for imaging and sensing, yet it is challenging to design them with on-demand variable optical properties. Here, Nagelberg et al. use bi-phase emulsion droplets to design reconfigurable micro-lenses with variable focal length.
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212
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213
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He Y, Savagatrup S, Zarzar LD, Swager TM. Interfacial Polymerization on Dynamic Complex Colloids: Creating Stabilized Janus Droplets. ACS APPLIED MATERIALS & INTERFACES 2017; 9:7804-7811. [PMID: 28198607 DOI: 10.1021/acsami.6b15791] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Complex emulsions, including Janus droplets, are becoming increasingly important in pharmaceuticals and medical diagnostics, the fabrication of microcapsules for drug delivery, chemical sensing, E-paper display technologies, and optics. Because fluid Janus droplets are often sensitive to external perturbation, such as unexpected changes in the concentration of the surfactants or surface-active biomolecules in the environment, stabilizing their morphology is critical for many real-world applications. To endow Janus droplets with resistance to external chemical perturbations, we demonstrate a general and robust method of creating polymeric hemispherical shells via interfacial free-radical polymerization on the Janus droplets. The polymeric hemispherical shells were characterized by optical and fluorescence microscopy, scanning electron microscopy, and confocal laser scanning microscopy. By comparing phase diagrams of a regular Janus droplet and a Janus droplet with the hemispherical shell, we show that the formation of the hemispherical shell nearly doubles the range of the Janus morphology and maintains the Janus morphology upon a certain degree of external perturbation (e.g., adding hydrocarbon-water or fluorocarbon-water surfactants). We attribute the increased stability of the Janus droplets to (1) the surfactant nature of polymeric shell formed and (2) increase in interfacial tension between hydrocarbon and fluorocarbon due to polymer shell formation. This finding opens the door of utilizing these stabilized Janus droplets in a demanding environment.
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Affiliation(s)
- Yuan He
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology , Cambridge Massachusetts 02139, United States
| | - Suchol Savagatrup
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology , Cambridge Massachusetts 02139, United States
| | - Lauren D Zarzar
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology , Cambridge Massachusetts 02139, United States
- Department of Materials Science and Engineering and Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United States
| | - Timothy M Swager
- Department of Chemistry and Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology , Cambridge Massachusetts 02139, United States
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214
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Ge XH, Geng YH, Zhang QC, Shao M, Chen J, Luo GS, Xu JH. Four reversible and reconfigurable structures for three-phase emulsions: extended morphologies and applications. Sci Rep 2017; 7:42738. [PMID: 28198444 PMCID: PMC5309921 DOI: 10.1038/srep42738] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 01/13/2017] [Indexed: 12/15/2022] Open
Abstract
Here in this article, we classify and conclude the four morphologies of three-phase emulsions. Remarkably, we achieve the reversible transformations between every shape. Through theoretical analysis, we choose four liquid systems to form these four morphologies. Then monodispersed droplets with these four morphologies are formed through a microfluidic device and captured in a petri-dish. By replacing their ambient solution of the captured emulsions, in-situ morphology transformations between each shape are achieved. The process is well recorded through photographs and videos and they are systematical and reversible. Finally, we use the droplets structure to form an on-off switch to start and shut off the evaporation of one volatile phase to achieve the process monitoring. This could be used to initiate and quench a reaction, which offers a novel idea to achieve the switchable and reversible reaction control in multiple-phase reactions.
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Affiliation(s)
- Xue-Hui Ge
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
| | - Yu-Hao Geng
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
| | - Qiao-Chu Zhang
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
| | - Meng Shao
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
| | - Jian Chen
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
| | - Guang-Sheng Luo
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
| | - Jian-Hong Xu
- The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084 (China)
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215
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Powell KC, Damitz R, Chauhan A. Relating emulsion stability to interfacial properties for pharmaceutical emulsions stabilized by Pluronic F68 surfactant. Int J Pharm 2017; 521:8-18. [PMID: 28192158 DOI: 10.1016/j.ijpharm.2017.01.058] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 01/12/2017] [Accepted: 01/28/2017] [Indexed: 11/19/2022]
Abstract
We explore mechanisms of emulsion stability for several systems using Pluronic F68 and a range of oils commonly used in pharmaceutics and cosmetics. We report measurements of dynamic emulsion drop size, zeta potential, and creaming time, as well as dynamic interfacial tension and interfacial viscoelasticity. Experiments show that with 1wt% Pluronic F68, soybean oil emulsions were the most stable with no creaming over six months, followed by isopropyl myristate, octanoic acid, and then ethyl butyrate. The eventual destabilization occurred due to the rising of large drops which formed through Ostwald ripening and coalescence. While Ostwald ripening is important, it is not the dominant destabilization mechanism for the time scale of interest in pharmaceutical emulsions. The more significant destabilization mechanism, coalescence, is reduced through surfactant adsorption, which decreases surface tension, increases surface elasticity, and adds a stearic hindrance to collisions. Though the measured values of elasticity obtained using a standard oscillatory pendant drop method did not correlate to emulsion stability, this is because the frequencies for the measurements were orders of magnitude below those relevant to coalescence in emulsions. However, we show that the high frequency elasticity obtained by fitting the surface tension data to a Langmuir isotherm has very good correlation with the emulsion stability, indicating that the elasticity of the interface plays a key role in stabilizing these pharmaceutical formulations. Further, this study highlights how these important high frequency elasticity values can be easily estimated from surface isotherms.
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Affiliation(s)
- Kristin Conrad Powell
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, United States.
| | - Robert Damitz
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, United States.
| | - Anuj Chauhan
- Department of Chemical Engineering, University of Florida, 1030 Center Drive, Gainesville, FL, 32611, United States.
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216
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Mamane A, Chevallier E, Olanier L, Lequeux F, Monteux C. Optical control of surface forces and instabilities in foam films using photosurfactants. SOFT MATTER 2017; 13:1299-1305. [PMID: 28111682 DOI: 10.1039/c6sm01846g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Molecular interactions in thin liquid films, such as the disjoining pressure, are involved in interfacial phenomena such as emulsion and foam stabilization. In this article we show that through light stimulation we can control remotely the disjoining pressure in a thin liquid film stabilized by a photosurfactant. We stabilize a horizontal thin liquid film using a cationic photosurfactant, AzoTAB, bearing an azobenzene moiety on the hydrophobic tail which can switch from a trans to a cis conformation upon light stimulation. As the film is illuminated at specific wavelengths the AzoTAB molecules switch continuously their conformation and consequently their interface affinity. The main consequence of stimulating the film with light is increasing the ratio of cis in the film. This provokes a desorption flux, and an increase in the concentration of free surfactants, as the CMC of the cis isomer is higher than that of the trans isomer. Therefore the electrostatic repulsion between the surfactant layers that stabilize the film decreases, inducing an instability in the film thickness. For films with a thickness between 20 nm and 60 nm, we observe the formation of spherical caps up to 100 μm wide, whose shape is controlled by the competition between surface tension and disjoining pressure. The motion of these caps in the film is restrained by the surface viscosity of the surfactant layers. In addition, for thicknesses below 40 nm and depending on light intensity, we can observe flat stratified islands up to 100 μm wide, with thickness steps corresponding to the size of a surfactant micelle. We suggest that this second instability is due to the oscillation of the disjoining pressure isotherm under light.
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Affiliation(s)
- Alexandre Mamane
- École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France. and Sorbonne-Universités, UPMC Univ Paris 06, SIMM, 10 rue Vauquelin, F-75231 Paris cedex 05, France
| | - Eloise Chevallier
- École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France. and Sorbonne-Universités, UPMC Univ Paris 06, SIMM, 10 rue Vauquelin, F-75231 Paris cedex 05, France
| | - Ludovic Olanier
- École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France. and Sorbonne-Universités, UPMC Univ Paris 06, SIMM, 10 rue Vauquelin, F-75231 Paris cedex 05, France
| | - François Lequeux
- École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France. and Sorbonne-Universités, UPMC Univ Paris 06, SIMM, 10 rue Vauquelin, F-75231 Paris cedex 05, France
| | - Cécile Monteux
- École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI), ParisTech, PSL Research University, Sciences et Ingénierie de la Matière Molle (SIMM), CNRS UMR 7615, 10 rue Vauquelin, F-75231 Paris cedex 05, France. and Sorbonne-Universités, UPMC Univ Paris 06, SIMM, 10 rue Vauquelin, F-75231 Paris cedex 05, France
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217
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Ge L, Li J, Zhong S, Sun Y, Friberg SE, Guo R. Single, Janus, and Cerberus emulsions from the vibrational emulsification of oils with significant mutual solubility. SOFT MATTER 2017; 13:1012-1019. [PMID: 28083592 DOI: 10.1039/c6sm02690g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Single, Janus, and Cerberus emulsions are prepared in one system consisting of three oils: silicone (SO), fluorocarbon (FO) and ethoxylated trimethylolpropane triacrylate (ETPTA) with mutual solubility. An aqueous solution of Pluronic F127, which is an poly(ethylene oxide)/poly(propylene oxide) co-polymer of average composition EO97PO68EO97, was employed as the continuous phase. The three-dimensional phase diagram of the oils was determined, and different oil compositions within the various regions of the phase diagram were emulsified by one-step vortex mixing with an F127 aqueous solution. The result showed single, Janus, and Cerberus emulsions within the different regions of the phase diagram; i.e. the emulsions reflected the equilibrium system. The topology of the Cerberus droplets is to an overwhelming extent linear-singlet and exclusively lobe order of EF/FO/SF. Since the results indicate a significant effect of the equilibrium interfacial tensions on the drop topology, thermodynamic calculations were made using the experimentally determined interfacial tensions. The results, as expected, show that the Cerberus emulsions are thermodynamically preferred over separate drops of the individual oils. In addition, the calculations demonstrate that the order of lobes within a drop is thermodynamically favored.
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Affiliation(s)
- Lingling Ge
- School of Chemistry and Chemical Engineering, Yangzhou University, Jiangsu Province 225002, People's Republic of China.
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218
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Shi C, Zhang L, Xie L, Lu X, Liu Q, He J, Mantilla CA, Van den Berg FGA, Zeng H. Surface Interaction of Water-in-Oil Emulsion Droplets with Interfacially Active Asphaltenes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1265-1274. [PMID: 28081605 DOI: 10.1021/acs.langmuir.6b04265] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Adsorption of interfacially active components at the water/oil interface plays critical roles in determining the properties and behaviors of emulsion droplets. In this study, the droplet probe atomic force microscopy (AFM) technique was applied, for the first time, to quantitatively study the interaction mechanism between water-in-oil (W/O) emulsion droplets with interfacially adsorbed asphaltenes. The behaviors and stability of W/O emulsion droplets were demonstrated to be significantly influenced by the asphaltene concentration of organic solution where the emulsions were aged, aging time, force load, contact time, and solvent type. Bare water droplets could readily coalesce with each other in oil (i.e., toluene), while interfacially adsorbed asphaltenes could sterically inhibit droplet coalescence and induce interfacial adhesion during separation of the water droplets. For low asphaltene concentration cases, the adhesion increased with increasing asphaltene concentration (≤100 mg/L), but it significantly decreased at relatively high asphaltene concentration (e.g., 500 mg/L). Experiments in Heptol (i.e., mixture of toluene and heptane) showed that the addition of a poor solvent for asphaltenes (e.g., heptane) could enhance the interfacial adhesion between emulsion droplets at relatively low asphaltene concentration but could weaken the adhesion at relatively high asphaltene concentration. This work has quantified the interactions between W/O emulsion droplets with interfacially adsorbed asphaltenes, and the results provide useful implications into the stabilization mechanisms of W/O emulsions in oil production. The methodology in this work can be readily extended to other W/O emulsion systems with interfacially active components.
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Affiliation(s)
- Chen Shi
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, AB T6G 1H9, Canada
| | - Ling Zhang
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, AB T6G 1H9, Canada
| | - Lei Xie
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, AB T6G 1H9, Canada
| | - Xi Lu
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, AB T6G 1H9, Canada
| | - Qingxia Liu
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, AB T6G 1H9, Canada
| | - Jiajun He
- Shell International Exploration and Production Inc., Houston, Texas 77079, United States
| | - Cesar A Mantilla
- Shell International Exploration and Production Inc., Houston, Texas 77079, United States
| | | | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, AB T6G 1H9, Canada
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219
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Bai L, Huan S, Zhang X, Jia Z, Gu J, Li Z. Rational design and synthesis of transition layer-mediated structured latex particles with poly(vinyl acetate) cores and poly(styrene) shells. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-016-4008-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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220
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Mondal S, Varenik M, Bloch DN, Atsmon-Raz Y, Jacoby G, Adler-Abramovich L, Shimon LJ, Beck R, Miller Y, Regev O, Gazit E. A minimal length rigid helical peptide motif allows rational design of modular surfactants. Nat Commun 2017; 8:14018. [PMID: 28084315 PMCID: PMC5241864 DOI: 10.1038/ncomms14018] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 11/15/2016] [Indexed: 01/12/2023] Open
Abstract
Extensive work has been invested in the design of bio-inspired peptide emulsifiers. Yet, none of the formulated surfactants were based on the utilization of the robust conformation and self-assembly tendencies presented by the hydrophobins, which exhibited highest surface activity among all known proteins. Here we show that a minimalist design scheme could be employed to fabricate rigid helical peptides to mimic the rigid conformation and the helical amphipathic organization. These designer building blocks, containing natural non-coded α-aminoisobutyric acid (Aib), form superhelical assemblies as confirmed by crystallography and microscopy. The peptide sequence is amenable to structural modularity and provides the highest stable emulsions reported so far for peptide and protein emulsifiers. Moreover, we establish the ability of short peptides to perform the dual functions of emulsifiers and thickeners, a feature that typically requires synergistic effects of surfactants and polysaccharides. This work provides a different paradigm for the molecular engineering of bioemulsifiers. Emulsifiers are used in the pharmaceutical, food, cosmetic, and biomedical industry. Here the authors fabricate rigid helical peptides that can perform as emulsifiers and thickeners, which typically requires synergistic effects of surfactants and polysaccharides.
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221
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Abstract
Liquid–liquid phase separation is prevalent in aerosol particles composed of organic compounds and salts and may impact aerosol climate effects.
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222
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Wu S, Butt HJ. Near-infrared photochemistry at interfaces based on upconverting nanoparticles. Phys Chem Chem Phys 2017; 19:23585-23596. [DOI: 10.1039/c7cp01838j] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We review near-infrared photochemistry at interfaces based on upconverting nanoparticles, highlight its potential applications, and discuss the challenges.
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Affiliation(s)
- Si Wu
- Max Planck Institute for Polymer Research
- 55128 Mainz
- Germany
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223
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Truzzolillo D, Cipelletti L. Off-equilibrium surface tension in miscible fluids. SOFT MATTER 2016; 13:13-21. [PMID: 27264076 DOI: 10.1039/c6sm01026a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The interfacial tension between immiscible fluids is responsible for a wealth of every-day phenomena, from the spherical shape of small drops and bubbles to the ability to walk on water of many insects. More than a century ago, physicist and mathematician D. Korteweg postulated the existence of an effective interface tension for miscible fluids, whenever a composition gradient exists, as encountered, e.g., in many flow geometries. In this mini-review, we discuss experimental work performed in the last decades that demonstrates the existence of a positive effective interface tension in a variety of systems, from molecular, near-critical liquids to complex fluids such as polymer solutions and colloidal suspensions. The various experimental strategies that have been deployed are discussed, together with their advantages and limitations. Finally, some of the key theoretical questions still open are outlined.
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Affiliation(s)
- Domenico Truzzolillo
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, Montpellier, France. domenico.truzzolillo@umontpellier
| | - Luca Cipelletti
- Laboratoire Charles Coulomb (L2C), UMR 5221 CNRS-Université de Montpellier, Montpellier, France. domenico.truzzolillo@umontpellier
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224
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Mok Y, Noh M, Chan Kim G, Song Y, Kim H, Kim S, Yi S, Seo JH, Lee Y. Light-tunable thermoresponsive behavior of branched polyethylenimine derivatives in water. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.11.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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225
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Thiele J. Polymer Material Design by Microfluidics Inspired by Cell Biology and Cell-Free Biotechnology. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600429] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Julian Thiele
- Leibniz-Institut für Polymerforschung Dresden e. V; Leibniz Research Cluster (LRC); Hohe Straße 6 01069 Dresden Germany
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226
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Lee H, Choi CH, Abbaspourrad A, Wesner C, Caggioni M, Zhu T, Nawar S, Weitz DA. Fluorocarbon Oil Reinforced Triple Emulsion Drops. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:8425-8430. [PMID: 27479940 DOI: 10.1002/adma.201602804] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/10/2016] [Indexed: 06/06/2023]
Abstract
Fluorocarbon oil reinforced triple emulsion drops are prepared to encapsulate a broad range of polar and non-polar cargoes in a single platform. In addition, it is demonstrated that the fluorocarbon oil within the emulsion drop acts as an effective diffusion barrier, as well as a non-adhesive layer, enabling highly efficient encapsulation and retention of small molecules and active biomolecules in microcapsules.
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Affiliation(s)
- Hyomin Lee
- Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Chang-Hyung Choi
- Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | | | - Chris Wesner
- Corporate Engineering, The Procter & Gamble Company, Cincinnati, OH, 45069, USA
| | - Marco Caggioni
- Corporate Engineering, The Procter & Gamble Company, Cincinnati, OH, 45069, USA
| | - Taotao Zhu
- Corporate Engineering, The Procter & Gamble Company, Cincinnati, OH, 45069, USA
| | - Saraf Nawar
- Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - David A Weitz
- Department of Physics, School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.
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227
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Silva BF, Rodríguez-Abreu C, Vilanova N. Recent advances in multiple emulsions and their application as templates. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.07.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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228
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Nisisako T. Recent advances in microfluidic production of Janus droplets and particles. Curr Opin Colloid Interface Sci 2016. [DOI: 10.1016/j.cocis.2016.05.003] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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229
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230
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Lee TY, Choi TM, Shim TS, Frijns RAM, Kim SH. Microfluidic production of multiple emulsions and functional microcapsules. LAB ON A CHIP 2016; 16:3415-40. [PMID: 27470590 DOI: 10.1039/c6lc00809g] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Recent advances in microfluidics have enabled the controlled production of multiple-emulsion drops with onion-like topology. The multiple-emulsion drops possess an intrinsic core-shell geometry, which makes them useful as templates to create microcapsules with a solid membrane. High flexibility in the selection of materials and hierarchical order, achieved by microfluidic technologies, has provided versatility in the membrane properties and microcapsule functions. The microcapsules are now designed not just for storage and release of encapsulants but for sensing microenvironments, developing structural colours, and many other uses. This article reviews the current state of the art in the microfluidic-based production of multiple-emulsion drops and functional microcapsules. The three main sections of this paper discuss distinct microfluidic techniques developed for the generation of multiple emulsions, four representative methods used for solid membrane formation, and various applications of functional microcapsules. Finally, we outline the current limitations and future perspectives of microfluidics and microcapsules.
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Affiliation(s)
- Tae Yong Lee
- Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, South Korea.
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231
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Abstract
Development of controlled vacuum is having many applications in the realm of biotechnology, cell transfer, gene therapy, biomedical engineering and other engineering activities involving separation or chemical reactions. Here we show the controlled vacuum generation through a biocompatible, energy efficient, low-cost and flexible miniature device. We have designed and fabricated microfluidic devices from polydimethylsiloxane which are capable of producing vacuum at a highly controlled rate by using water as a motive fluid. Scrupulous removal of infected fluid/body fluid from the internal hemorrhage affected parts during surgical operations, gene manipulation, cell sorting, and other biomedical activities require complete isolation of the delicate cells or tissues adjacent to the targeted location. We demonstrate the potential of the miniature device to obtain controlled evacuation without the use of highly pressurized motive fluids. Water has been used as a motive liquid to eject vapor and liquid at ambient conditions through the microfluidic devices prepared using a low-cost fabrication method. The proposed miniature device may find applications in vacuum generation especially where the controlled rate of evacuation, and limited vacuum generation are of utmost importance in order to precisely protect the cells in the nearby region of the targeted evacuated area.
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232
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Li M, Li D. Fabrication and electrokinetic motion of electrically anisotropic Janus droplets in microchannels. Electrophoresis 2016; 38:287-295. [DOI: 10.1002/elps.201600310] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 07/29/2016] [Accepted: 07/30/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Mengqi Li
- Department of Mechanical and Mechatronics Engineering; University of Waterloo; Waterloo Canada
| | - Dongqing Li
- Department of Mechanical and Mechatronics Engineering; University of Waterloo; Waterloo Canada
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233
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Şologan M, Cantarutti C, Bidoggia S, Polizzi S, Pengo P, Pasquato L. Routes to the preparation of mixed monolayers of fluorinated and hydrogenated alkanethiolates grafted on the surface of gold nanoparticles. Faraday Discuss 2016; 191:527-543. [PMID: 27459891 DOI: 10.1039/c6fd00016a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The use of binary blends of hydrogenated and fluorinated alkanethiolates represents an interesting approach to the construction of anisotropic hybrid organic-inorganic nanoparticles since the fluorinated and hydrogenated components are expected to self-sort on the nanoparticle surface because of their reciprocal phobicity. These mixed monolayers are therefore strongly non-ideal binary systems. The synthetic routes we explored to achieve mixed monolayer gold nanoparticles displaying hydrogenated and fluorinated ligands clearly show that the final monolayer composition is a non-linear function of the initial reaction mixture. Our data suggest that, under certain geometrical constraints, nucleation and growth of fluorinated domains could be the initial event in the formation of these mixed monolayers. The onset of domain formation depends on the structure of the fluorinated and hydrogenated species. The solubility of the mixed monolayer nanoparticles displayed a marked discontinuity as a function of the monolayer composition. When the fluorinated component content is small, the nanoparticle systems are fully soluble in chloroform, at intermediate content the nanoparticles become soluble in hexane and eventually they become soluble in fluorinated solvents only. The ranges of monolayer compositions in which the solubility transitions are observed depend on the nature of the thiols composing the monolayer.
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Affiliation(s)
- Maria Şologan
- Department of Chemical and Pharmaceutical Sciences and INSTM Trieste Unit, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy.
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234
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Fortin TJ, Laesecke A, Widegren JA. Measurement and Correlation of Densities and Dynamic Viscosities of Perfluoropolyether Oils. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b01921] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tara J. Fortin
- National Institute of Standards and Technology,
Material Measurement Laboratory, Applied Chemicals and Materials Division, 325 Broadway, Boulder, Colorado 80305-3328, United States
| | - Arno Laesecke
- National Institute of Standards and Technology,
Material Measurement Laboratory, Applied Chemicals and Materials Division, 325 Broadway, Boulder, Colorado 80305-3328, United States
| | - Jason A. Widegren
- National Institute of Standards and Technology,
Material Measurement Laboratory, Applied Chemicals and Materials Division, 325 Broadway, Boulder, Colorado 80305-3328, United States
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235
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Zhang Y, Shitta A, Meredith JC, Behrens SH. Bubble Meets Droplet: Particle-Assisted Reconfiguration of Wetting Morphologies in Colloidal Multiphase Systems. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:3309-3319. [PMID: 27167839 DOI: 10.1002/smll.201600799] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Indexed: 06/05/2023]
Abstract
Wetting phenomena are ubiquitous in nature and play key functions in various industrial processes and products. When a gas bubble encounters an oil droplet in an aqueous medium, it can experience either partial wetting or complete engulfment by the oil. Each of these morphologies can have practical benefits, and controlling the morphology is desirable for applications ranging from particle synthesis to oil recovery and gas flotation. It is known that the wetting of two fluids within a fluid medium depends on the balance of interfacial tensions and can thus be modified with surfactant additives. It is reported that colloidal particles, too, can be used to promote both wetting and dewetting in multifluid systems. This study demonstrates the surfactant-free tuning and dynamic reconfiguration of bubble-droplet morphologies with the help of cellulosic particles. It further shows that the effect can be attributed to particle adsorption at the fluid interfaces, which can be probed by interfacial tensiometry, making particle-induced transitions in the wetting morphology predictable. Finally, particle adsorption at different rates to air-water and oil-water interfaces can even lead to slow, reentrant wetting behavior not familiar from particle-free systems.
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Affiliation(s)
- Yi Zhang
- School of Chemical & Biomoelcular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0100, USA
| | - Abiola Shitta
- School of Chemical & Biomoelcular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0100, USA
| | - J Carson Meredith
- School of Chemical & Biomoelcular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0100, USA
| | - Sven H Behrens
- School of Chemical & Biomoelcular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0100, USA
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236
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Zhang Q, Xu M, Liu X, Zhao W, Zong C, Yu Y, Wang Q, Gai H. Fabrication of Janus droplets by evaporation driven liquid-liquid phase separation. Chem Commun (Camb) 2016; 52:5015-8. [PMID: 26983706 DOI: 10.1039/c6cc00249h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We present a universal and scalable method to fabricate Janus droplets based on evaporation driven liquid-liquid phase separation. In this work, the morphologies and chemical properties of separate parts of the Janus droplets can be flexibly regulated, and more complex Janus droplets (such as core-shell Janus droplets, ternary Janus droplets, and multiple Janus droplets) can be constructed easily.
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Affiliation(s)
- Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China.
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237
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Wang T, Kuang M, Jin F, Cai J, Shi L, Zheng Y, Wang J, Jiang L. Simultaneous synthesis/assembly of anisotropic cake-shaped porphyrin particles toward colloidal microcrystals. Chem Commun (Camb) 2016; 52:3619-22. [PMID: 26906626 DOI: 10.1039/c5cc10233b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The one-step synthesis/assembly of a cake-shaped porphyrin colloidal microcrystal with tailored height-diameter was demonstrated based on interfacial assembly and the water-droplet template. The as-fabricated anisotropic colloidal crystals showed special optic properties and enhanced optic-limiting behavior.
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Affiliation(s)
- Ting Wang
- School of Chem & Environm, Beihang University, Beijing 100191, P. R. China
| | - Minxuan Kuang
- Laboratory of Bio-Inspired Smart Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Feng Jin
- Laboratory of Bio-Inspired Smart Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Jinhua Cai
- College of Chemistry & Chemical Engineering, Jinggangshan University, Jian, Jiangxi Province 340039, P. R. China
| | - Lei Shi
- Department of Physics, Key Laboratory of Micro & Nano Photonic Structures (MOE) and Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, P. R. China
| | - Yongmei Zheng
- School of Chem & Environm, Beihang University, Beijing 100191, P. R. China
| | - Jingxia Wang
- Laboratory of Bio-Inspired Smart Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
| | - Lei Jiang
- Laboratory of Bio-Inspired Smart Interface Sciences, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
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238
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Bai L, McClements DJ. Development of microfluidization methods for efficient production of concentrated nanoemulsions: Comparison of single- and dual-channel microfluidizers. J Colloid Interface Sci 2016; 466:206-12. [DOI: 10.1016/j.jcis.2015.12.039] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2015] [Revised: 12/18/2015] [Accepted: 12/21/2015] [Indexed: 01/10/2023]
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239
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Wang X, Hou Y, Yao L, Gao M, Ge M. Generation, Characterization, and Application of Hierarchically Structured Self-Assembly Induced by the Combined Effect of Self-Emulsification and Phase Separation. J Am Chem Soc 2016; 138:2090-3. [DOI: 10.1021/jacs.5b12149] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Xiuyu Wang
- Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Yi Hou
- Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Li Yao
- Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Mingyuan Gao
- Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Maofa Ge
- Beijing National Laboratory
for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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240
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Clegg PS, Tavacoli JW, Wilde PJ. One-step production of multiple emulsions: microfluidic, polymer-stabilized and particle-stabilized approaches. SOFT MATTER 2016; 12:998-1008. [PMID: 26576500 DOI: 10.1039/c5sm01663k] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Multiple emulsions have great potential for application in food science as a means to reduce fat content or for controlled encapsulation and release of actives. However, neither production nor stability is straightforward. Typically, multiple emulsions are prepared via two emulsification steps and a variety of approaches have been deployed to give long-term stability. It is well known that multiple emulsions can be prepared in a single step by harnessing emulsion inversion, although the resulting emulsions are usually short lived. Recently, several contrasting methods have been demonstrated which give rise to stable multiple emulsions via one-step production processes. Here we review the current state of microfluidic, polymer-stabilized and particle-stabilized approaches; these rely on phase separation, the role of electrolyte and the trapping of solvent with particles respectively.
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Affiliation(s)
- Paul S Clegg
- School of Physics and Astronomy, University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
| | - Joe W Tavacoli
- School of Physics and Astronomy, University of Edinburgh, Peter Guthrie Tait Road, Edinburgh, EH9 3FD, UK.
| | - Pete J Wilde
- Institute of Food Research, Norwich Research Park, Norwich NR4 7UA, UK
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241
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Lenis J, Razavi S, Cao KD, Lin B, Lee KYC, Tu RS, Kretzschmar I. Mechanical Stability of Polystyrene and Janus Particle Monolayers at the Air/Water Interface. J Am Chem Soc 2015; 137:15370-3. [DOI: 10.1021/jacs.5b10183] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Jessica Lenis
- Department
of Chemical Engineering, City College of City University of New York, New
York, New York 10031, United States
- Department
of Chemistry, Institute for Biophysical Dynamics, and James Franck
Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Sepideh Razavi
- Department
of Chemical Engineering, City College of City University of New York, New
York, New York 10031, United States
| | - Kathleen D. Cao
- Department
of Chemistry, Institute for Biophysical Dynamics, and James Franck
Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Binhua Lin
- James
Franck Institute and Center for Advanced Radiation Sources, The University of Chicago, Chicago, Illinois 60637, United States
| | - Ka Yee C. Lee
- Department
of Chemistry, Institute for Biophysical Dynamics, and James Franck
Institute, The University of Chicago, Chicago, Illinois 60637, United States
| | - Raymond S. Tu
- Department
of Chemical Engineering, City College of City University of New York, New
York, New York 10031, United States
| | - Ilona Kretzschmar
- Department
of Chemical Engineering, City College of City University of New York, New
York, New York 10031, United States
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242
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Jiang Z, Jia K, Liu X, Dong J, Li X. Multiple Responsive Fluids Based on Vesicle to Wormlike Micelle Transitions by Single-Tailed Pyrrolidone Surfactants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11760-11768. [PMID: 26473558 DOI: 10.1021/acs.langmuir.5b02312] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report a new family of multiple responsive fluids based on the single-tailed pyrrolidone surfactants, N-ethyl-2-pyrrolidone N-alkyl amine (C(m)NP, where m = 10, 12, 14, 16, and 18). These surfactants are highly sensitive to solution pH as a result of the presence of the N-amino group in the molecules. Equilibrium surface tension results indicate that both the surface activity and micellization ability of C(m)NPs decrease with the increase of the protonation degree; i.e., they exhibit a higher critical micelle concentration (cmc) and higher surface tension at the cmc (γ(cmc)) at the acidic conditions than those at the basic conditions. The cmc values of C(m)NPs follow the well-known Klevens equation, which decrease linearly with the increase of the hydrocarbon chain length m at a given pH. More importantly, the self-assemblies of C(m)NPs are highly sensitive to pH, CO2, and CuCl2, as identified by turbidity and viscosity. The transitions between vesicles and wormlike micelles are further confirmed by rheology, static and dynamic light scattering (SLS and DLS), cryogenic transmission electron microscopy (cryo-TEM), and nuclear magnetic resonance (NMR) techniques systematically. Although the aggregate transitions induced by different factors are similar, however, the mechanisms are different. The pH- and CO2-induced transitions are attributed to variation in the protonation degree of the N-amino group; however, CuCl2-induced transitions are a result of the formation of C(m)NP and CuCl2 coordination complexes as revealed by two-dimensional (2D) nuclear Overhauser effect spectrometry (NOESY) NMR and ultraviolet-visible (UV-vis) spectra.
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Affiliation(s)
- Zan Jiang
- College of Chemistry and Molecular Science, Wuhan University , Wuhan, Hubei 430072, People's Republic of China
| | - Kangle Jia
- College of Chemistry and Molecular Science, Wuhan University , Wuhan, Hubei 430072, People's Republic of China
| | - Xiong Liu
- College of Chemistry and Molecular Science, Wuhan University , Wuhan, Hubei 430072, People's Republic of China
| | - Jinfeng Dong
- College of Chemistry and Molecular Science, Wuhan University , Wuhan, Hubei 430072, People's Republic of China
| | - Xuefeng Li
- College of Chemistry and Molecular Science, Wuhan University , Wuhan, Hubei 430072, People's Republic of China
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243
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Kalow JA, Swager TM. Synthesis of Miktoarm Branched Conjugated Copolymers by ROMPing In and Out. ACS Macro Lett 2015; 4:1229-1233. [PMID: 26523242 PMCID: PMC4627642 DOI: 10.1021/acsmacrolett.5b00541] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Architecture represents an underutilized yet promising control element in polymer design due to the challenging synthesis of compositionally varied branched copolymers. We report the one-pot synthesis of miktoarm branched polymers by ring-opening metathesis polymerization. In this work, we graft to and from telechelic poly(3-hexylthiophene), which is end-capped by oxime click chemistry, using various norbornene monomers. The self-assembly of the resulting miktoarm H-shaped conjugated polymers is studied in solution and in the solid state. A dual stimuli-responsive miktoarm polymer is prepared which displays pH-switchable lower critical solution temperature and fluorescence.
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Affiliation(s)
- Julia A. Kalow
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Timothy M. Swager
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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Jeong J, Gross A, Wei WS, Tu F, Lee D, Collings PJ, Yodh AG. Liquid crystal Janus emulsion droplets: preparation, tumbling, and swimming. SOFT MATTER 2015; 11:6747-6754. [PMID: 26171829 DOI: 10.1039/c5sm01053e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This study introduces liquid crystal (LC) Janus droplets. We describe a process for the preparation of these droplets, which consist of nematic LC and polymer compartments. The process employs solvent-induced phase separation in emulsion droplets generated by microfluidics. The droplet morphology was systematically investigated and demonstrated to be sensitive to the surfactant concentration in the background phase, the compartment volume ratio, and the possible coalescence of multiple Janus droplets. Interestingly, the combination of a polymer and an anisotropic LC introduces new functionalities into Janus droplets, and these properties lead to unusual dynamical behaviors. The different densities and solubilities of the two compartments produce gravity-induced alignment, tumbling, and directional self-propelled motion of Janus droplets. LC Janus droplets with remarkable optical properties and dynamical behaviors thus offer new avenues for applications of Janus colloids and active soft matter.
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Affiliation(s)
- Joonwoo Jeong
- School of Natural Science, Department of Physics, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Republic of Korea.
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Vasiliauskas R, Liu D, Cito S, Zhang H, Shahbazi MA, Sikanen T, Mazutis L, Santos HA. Simple Microfluidic Approach to Fabricate Monodisperse Hollow Microparticles for Multidrug Delivery. ACS APPLIED MATERIALS & INTERFACES 2015; 7:14822-14832. [PMID: 26098382 DOI: 10.1021/acsami.5b04824] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Herein, we report the production of monodisperse hollow microparticles from three different polymers, namely, pH-responsive acetylated dextran and hypromellose acetate succinate and biodegradable poly(lactic-co-glycolic acid), at varying polymer concentrations using a poly(dimethylsiloxane)-based microfluidic device. Hollow microparticles formed during solvent diffusion into the continuous phase when the polymer close to the interface solidified, forming the shell. In the inner part of the particle, phase separation induced solvent droplet formation, which dissolved the shell, forming a hole and a hollow-core particle. Computational simulations showed that, despite the presence of convective recirculation around the droplet, the mass-transfer rate of the solvent dissolution from the droplet to the surrounding phase was dominated by diffusion. To illustrate the potential use of hollow microparticles, we simultaneously encapsulated two anticancer drugs and investigated their loading and release profiles. In addition, by utilizing different polymer shells and polymer concentrations, the release profiles of the model drugs could be tailored according to specific demands and applications. The high encapsulation efficiency, controlled drug release, unique hollow microparticle structure, small particle size (<7 μm), and flexibility of the polymer choice could make these microparticles advanced platforms for pulmonary drug delivery.
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Affiliation(s)
- Remigijus Vasiliauskas
- †Vilnius University Institute of Biotechnology, Vilnius LT-02241, Lithuania
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Dongfei Liu
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Salvatore Cito
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Hongbo Zhang
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Mohammad-Ali Shahbazi
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Tiina Sikanen
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
| | - Linas Mazutis
- †Vilnius University Institute of Biotechnology, Vilnius LT-02241, Lithuania
- §School of Engineering and Applied Physics, Harvard University, Cambridge, Massachusetts 02138, United States
| | - Hélder A Santos
- ‡Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki FI-00014, Finland
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Gruner P, Riechers B, Chacòn Orellana LA, Brosseau Q, Maes F, Beneyton T, Pekin D, Baret JC. Stabilisers for water-in-fluorinated-oil dispersions: Key properties for microfluidic applications. Curr Opin Colloid Interface Sci 2015. [DOI: 10.1016/j.cocis.2015.07.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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