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Facile Dispersion and Control of Internal Structure in Lyotropic Liquid Crystalline Particles by Auxiliary Solvent Evaporation

21-11-2014 | Isabelle Martiel; Laurent Sagalowicz; Stephan Handschin; Raffaele Mezzenga, Langmuir, 2014

Submicron sized, structured lyotropic liquid crystalline (LLC) particles, so-called hexosomes and cubosomes, are generally obtained by high energy input dispersion methods, notably ultrasonication and high-pressure emulsification. We present a method to obtain dispersions of such LLC particles ...


Spontaneous Aryldiazonium Film Formation on 440C Stainless Steel in Nonaqueous Environments

17-11-2014 | Leo J. Small; Michael R. Hibbs; David R. Wheeler, Langmuir, 2014

The ability of three aryldiazonium salts to spontaneously assemble onto the surface of type 440C stainless steel is investigated in acetonitrile (ACN) and the model hydraulic fluids tributyl phosphate (TBP) and hexamethyldisiloxane (HMDS). Competition between native oxide formation and organic ...


Silica Entrapment for Significantly Stabilized, Energy-Conducting Light-Harvesting Complex (LHCII)

17-11-2014 | Sebastian Roeder; Stephan Hobe; Harald Paulsen, Langmuir, 2014

The major light-harvesting chlorophyll a/b complex (LHCII) of the photosynthetic apparatus in green plants consists of a membrane protein and numerous noncovalently bound pigments that make up about one-third of the molecular mass of the pigment–protein complex. Due to this high pigment density, ...


Adsorption of Lysozyme on Silver and Its Influence on Silver Release

14-11-2014 | Xin Wang; Gunilla Herting; Inger Odnevall Wallinder; Eva Blomberg, Langmuir, 2014

Silver is increasingly used in antimicrobial coatings of biomedical devices and implants to hinder infections. As proteins have been shown to largely influence the extent of released metals from various metal surfaces at biological conditions, silver may also be influenced in the same way. The ...


Nanostructured Lipid Carriers: Effect of Solid Phase Fraction and Distribution on the Release of Encapsulated Materials

14-11-2014 | Nily Dan, Langmuir, 2014

Emulsions, solid lipid nanoparticles (SLN), and nanostructured lipid carriers (NLC) containing a mix of liquid and solid domains are of interest as encapsulation vehicles for hydrophobic compounds. Studies of the release rate from these particles yield contradictory results: Some find that ...


Cyclodextrins and Surfactants in Aqueous Solution above the Critical Micelle Concentration: Where Are the Cyclodextrins Located?

13-11-2014 | Marina Tsianou; Ankitkumar I. Fajalia, Langmuir, 2014

Cyclodextrins (CDs) are known to bind surfactant molecules below the surfactant critical micelle concentration (CMC); however, interactions of CDs with surfactant micelles (above the CMC) are not well understood. In particular, direct structural evidence of the location of CDs in the different ...


Anomalous Diffusion in Thermoresponsive Polymer–Clay Composite Hydrogels Probed by Wide-Field Fluorescence Microscopy

13-11-2014 | Beate Stempfle; Anna Große; Bernhard Ferse; Karl-Friedrich Arndt; Dominik Wöll, Langmuir, 2014

Thermoresponsive materials exhibit an enormous potential for tissue engineering, separation systems, and drug delivery. We investigated the diffusion of laponite clay nanoparticles, which serve as physical cross-linkers to achieve improved material properties in poly(N-isopropylacrylamide) ...


Microcontact Imprinting of Algae for Biofuel Systems: The Effects of the Polymer Concentration

13-11-2014 | Mei-Hwa Lee; James L. Thomas; Ming-Yuan Lai; Ching-Ping Shih; Hung-Yin Lin, Langmuir, 2014

Microcontact imprinting of cells often involves the deposition of a polymer solution onto a monolayer cell stamp, followed by solvent evaporation. Thus, the concentration of the polymer may play an important role in the final morphology and efficacy of the imprinted film. In this work, various ...


Radiolytic Method as a Novel Approach for the Synthesis of Nanostructured Conducting Polypyrrole

13-11-2014 | Zhenpeng Cui; Cecilia Coletta; Alexandre Dazzi; Patrice Lefrançois; Matthieu Gervais; Stéphane Néron; Samy Remita, Langmuir, 2014

In this study, a novel and extremely facile method for the synthesis of conducting polypyrrole (PPy) was achieved in aqueous solution. This radiolytic method is totally free of template and environmentally friendly compared with traditional chemical methods. According to ultraviolet–visible ...


Colloidal Stability of Citrate and Mercaptoacetic Acid Capped Gold Nanoparticles upon Lyophilization: Effect of Capping Ligand Attachment and Type of Cryoprotectants

12-11-2014 | Alaaldin M. Alkilany; Samer R. Abulateefeh; Kayla K. Mills; Alaa I. Bani Yaseen; Majd A. Hamaly; Hatim S. Alkhatib; ..., Langmuir, 2014

For various applications of gold nanotechnology, long-term nanoparticle stability in solution is a major challenge. Lyophilization (freeze–drying) is a widely used process to convert labile protein and various colloidal systems into powder for improved long-term stability. However, the ...


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