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Interfacial Activity of AuC6 Nanoparticles Using the Pendant Drop Technique

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The structure and orientation of nanoparticles at the liquid–liquid interface may be useful for the preparation of robust, self-assembled structures, devices, and membranes. The pendant drop technique enables to study the interfacial activity of nanoparticles with smaller amounts and upon more controlled conditions than with the traditional Langmuir film balance technique. The pendant drop technique was applied to characterize the interfacial activity of 2 nm-diameter AuC6 nanoparticles. The AuC6 nanoparticles in tetrahydrofuran solution deposited at the water/air interface described a violent adsorption process as the tetrahydrofuran was evaporated. Growing and shrinking experiments for the water/air and water/decane interfaces enabled to explore the arrangement of the AuC6 nanoparticles at each interface. A simply scaled particle theory of hard disks model was in agreement with the experimental data.
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Keywords: INTERFACIAL ACTIVITY; NANOPARTICLES; PENDANT DROP; WATER/AIR INTERFACE; WATER/OIL INTERFACE

Document Type: Research Article

Publication date: 2014-06-01

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  • Journal of Colloid Science and Biotechnology is an international multidisciplinary peer- reviewed journal covering all aspects of colloid science including colloids preparation, characterization, structure-property relationships, spectroscopy, chemical and physical properties and applications of colloids in biotechnology, medicine and pharmaceuticals. This journal deals with interdisciplinary research areas of chemistry, physics, biology, materials science, polymer science, nanotechnology covering all topics related to colloids such as latexes, emulsions, suspensions, micellar systems, gels, composites, hybrids, surfactants, aerosols, foams, minerals, soft matter, microfluidics, encapsulation processes of active molecules, biomolecules, surfacial and interfacial processes, catalysis, electrochemistry, theoretical aspects, computer simulations and colloids in biotechnology and medicine.
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