Results 171 to 180 of about 5,132 (202)

Controlling the Roughness of Langmuir–Blodgett Monolayers

The Journal of Physical Chemistry B, 2017
Controlling the surface roughness of thin films with nanoscale precision is of significant interest for the rational design of surface coatings. Although wrinkling and buckling of Langmuir monolayers under compression has been demonstrated for several years, there is currently no method to precisely control this behavior during compression and thereby ...
Gregory J. Silverberg, Arthur A. McClelland, Sarah Griesse-Nascimento, Camille Girabawe, Julian P. Kadow, L. Mahadevan, Chad D. Vecitis   +6 more
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Langmuir Monolayers of Bent-Core Molecules

Langmuir, 2004
A 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, Ji, Wang, Violeta J, Beleva, Edgar E, Kooijman, Svetlana V, Primak, Jens, Risse, Wolfgang, Weissflog, Antal, Jákli, Elizabeth K, Mann   +8 more
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Flow-Induced Patterning of Langmuir Monolayers

Langmuir, 2004
Insoluble 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, Reza, Miraghaie, Juan M, Lopez, Amir H, Hirsa   +3 more
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Dilatational Yielding of Solid Langmuir Monolayers

The Journal of Physical Chemistry B, 2011
In 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, Th M, Fischer, N, Wilke   +2 more
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Pattern Formation in Phase-Separated Langmuir and Langmuir Monolayer Films

Langmuir, 2021
Mixed 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, 2007
Novel 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, Xiangke, Chen, Heather C, Allen   +2 more
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Collapse Mechanisms of Langmuir Monolayers

Annual Review of Physical Chemistry, 2008
When 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, 2007
An 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, Cory S, Pecinovsky, Michael J, McNevin, Douglas L, Gin, Daniel K, Schwartz   +4 more
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Theory of chiral defects in Langmuir monolayers

Physical Review E, 1995
Thin 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, 1997
The 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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