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Brewster R.,California Institute of Technology | Safran S.A.,Welzmann Institute of Science
Biophysical Journal | Year: 2010

A simple model of the line activity of a hybrid lipid (e.g., POPC) with one fully saturated chain and one partially unsaturated chain demonstrates that these lipids preferentially pack at curved interfaces between phase-separated saturated and unsaturated domains. We predict that the domain sizes typically range from tens to hundreds of nm, depending on molecular interactions and parameters such as molecular volume and area per headgroup in the bulk fluid phase. The role of cholesterol is taken into account by an effective change in the headgroup areas and the domain sizes are predicted to increase with cholesterol concentration. © 2010 by the Biophysical Society.

Switzer J.A.,Missouri University of Science and Technology | Hodes G.,Welzmann Institute of Science
MRS Bulletin | Year: 2010

Electrodeposition (ED) and chemical bath deposition (CBD) are both solution processing methods that assemble solid materials from molecules, ions, or complexes in solution. The reactions occur on solid surfaces to produce polycrystalline and epitaxial films, porous networks, nanorods, superlattices, and composites. Both methods can be used to produce metals, semiconductors, magnetic materials, and ceramics in a wide array of architectures. Because of the low processing temperatures (often near room temperature), the techniques are ideal for producing nanostructured materials and interfaces. The methods are not only Inexpensive and relatively simple, but they can often produce materials and nanostructures that cannot be accessed in ultrahigh vacuum. For example, the shape and orientation can be tuned by controlling the pH or through solution additives. Also, in ED, the departure from equilibrium can be precisely controlled through the applied potential. This issue attempts to provide understanding of the growth mechanisms-from the molecular to final structure-of interfacial electrochemical and CBD reactions. For example, the Influence of solution additives and pH and the effect of external parameters such as the applied potential will be discussed. Practical applications of these films and nanostructures include photovoltaic/photoelectrochemical cells and chemical/magnetic sensors.

De Ruiter G.,Welzmann Institute of Science | Tartakovsky E.,Welzmann Institute of Science | Oded N.,Welzmann Institute of Science | Van Der Boom M.E.,Welzmann Institute of Science
Angewandte Chemie - International Edition | Year: 2010

(Figure Presented) Having a selective memory: Osmium(ll)-based monolayers on glass substrates are versatile platforms for the generation of several sequential logic circuits with multiple inputs which are able to display random access memory (RAM) functionality in the form of a set/reset latch. Additionally, the type of logic displayed, for example, sequential or combinatorial, can be controlled by keeping the current state static or dynamic. © 2010 Wiley-VCH Verlag GmbH &. Co. KGaA, Weinheim.

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