Results 131 to 140 of about 1,825 (170)
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Langmuir Monolayers of Bent-Core Molecules
Langmuir, 2004A systematic study of five different, symmetric bent-core liquid crystals in Langmuir thin films at the air/water interface is presented. Both the end chains (siloxane vs hydrocarbon) and the core (more or less amphiphilic) are varied, to allow an exploration of different possible layer structures at the interface.
Lu, Zou +8 more
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Modern physicochemical research on Langmuir monolayers
Advances in Colloid and Interface Science, 2001Recent developments in characterising Langmuir monolayers of a variety of film-forming materials and employing several physicochemical techniques are reviewed. The extension of the LB method to non-amphiphilic substances, especially macromolecular systems, has increased the need of a thorough understanding of Langmuir film properties, which requires ...
Dynarowicz-Latka, P. +2 more
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Flow-Induced Patterning of Langmuir Monolayers
Langmuir, 2004Insoluble monolayers on water have been patterned at the macroscopic scale (i.e., at the centimeter scale of the flow apparatus) as well as the mesoscopic scale (i.e., down to the micron scale resolvable via optical microscopy). The macroscopic patterning at the air/water interface results from a hydrodynamic instability leading to a steadily ...
Michael J, Vogel +3 more
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Dilatational Yielding of Solid Langmuir Monolayers
The Journal of Physical Chemistry B, 2011In a previous work, Muruganathan and Fischer observed laser-induced local collapse of a methyl stearate monolayer. These experiments opened the possibility of studying the collapse mechanism in a highly controlled manner, since the laser intensity can be easily varied and collapse happens in a definite place (the laser focus). In this paper we extended
S, Aliaskarisohi +2 more
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Pattern Formation in Phase-Separated Langmuir and Langmuir Monolayer Films
Langmuir, 2021Mixed monolayer films comprising hydrogenated and fluorinated surfactants can undergo phase separation to produce interfaces with diverse structures at the micrometer and nanometer scales. This review discusses our progress over the past decade to probe the relationship that exists between the molecular structure of the surfactants that comprise the ...
Ci Yan, Matthew F. Paige
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Dangling OD Confined in a Langmuir Monolayer
Journal of the American Chemical Society, 2007Novel structural features of water confined in lipid Langmuir monolayers are revealed. Using vibrational sum frequency generation spectroscopy at the air/D2O/monolayer interface, dangling OD bonds were investigated. Upon increasing the monolayer surface coverage, the dangling OD stretching mode showed a marked frequency red-shift as well as spectral ...
Gang, Ma +2 more
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Collapse Mechanisms of Langmuir Monolayers
Annual Review of Physical Chemistry, 2008When a two-dimensional (2D) film is compressed to its stability limit, it explores the third dimension via collapse. Understanding this 2D-to-3D transition is of great importance as it provides insight into the origin of defects in thin films. This review draws attention to a reversible folding collapse first discovered in model lung surfactant ...
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Langmuir Monolayers of a Photoisomerizable Macrocycle Surfactant
Langmuir, 2007An amphiphilic photoisomerizable macrocycle has been prepared that forms stable Langmuir monolayers at the air-water interface. The hydrophilic core of the molecule switches between closed and open isomers upon irradiation by the appropriate wavelengths of light.
Eric, Karp +4 more
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Theory of chiral defects in Langmuir monolayers
Physical Review E, 1995Thin films often exhibit a spontaneous breaking of chiral symmetry. This symmetry breaking can occur on two distinct length scales. On a microscopic scale, nonchiral molecules can pack in a chiral structure. On a macroscopic scale, a striped texture can buckle to form a spiral.
, Selinger, , Selinger
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The Surface Potential of Langmuir Monolayers Revisited
Langmuir, 1997The surface potential characterization of Langmuir monolayers of simple, aliphatic compounds is revisited. Analogously to what has already been observed for fatty acids, the monolayer surface potential for esters and alcohols is close to zero at very large areas per molecule and only starts to increase at a given critical area.
Osvaldo N, Oliveira, Cláudia, Bonardi
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