Langmuir Monolayers ofp-(5‘-m-Terphenylyl)benzoic Acid and Its 2‘-Methyl Derivative at the Water/Air Interface

Langmuir ◽  
1996 ◽  
Vol 12 (20) ◽  
pp. 4966-4968 ◽  
Author(s):  
Jan Czapkiewicz ◽  
Patrycja Dynarowicz ◽  
Piotr Milart
Keyword(s):  
Benzoic Acid ◽  
Langmuir Monolayers ◽  
Methyl Derivative ◽  
Air Interface

Energetics and structures of the tilted phases of fatty acid Langmuir monolayers

2020 ◽  
Vol 22 (21) ◽  
pp. 12092-12103
Author(s):  
Óscar Toledano ◽  
Miguel A. Rubio ◽  
Óscar Gálvez
Keyword(s):  
Fatty Acid ◽  
Langmuir Monolayers ◽  
Dimensional Structure ◽  
Amphiphilic Molecules ◽  
Air Interface

Langmuir monolayers are monomolecular deep films composed of amphiphilic molecules which are typically confined to a water/air interface in a bi-dimensional structure.

scholarly journals Characterization of Monoolein Langmuir Monolayers Spread at The Salt Solution/Air Interface

2021 ◽  
Author(s):  
Balaji Sopanrao Dhopte ◽  
V. N. Lad
Keyword(s):  
Physicochemical Properties ◽  
Molecular Layer ◽  
Langmuir Monolayers ◽  
Langmuir Monolayer ◽  
Compression Isotherm ◽  
Water Interface ◽  
Air Interface ◽  
Special Groups ◽  
Air Water Interface ◽  
The Difference

Abstract The Langmuir monolayer is commonly described at interfaces for an insoluble homogenous single molecular layer. Langmuir monolayers have demonstrated various issues regarding soft matters and complex fluids by forming ideal uniform two-dimensional structures over the air-water interface. This monolayer has advantages for evaluating physicochemical properties at interfaces and, for the insoluble molecules, can be applied simultaneously to the different interaction occurrences at interfaces. For this experiment, monoolein lipid was used as a spreading solvent to create a Langmuir monolayer, and five different types of salt sub-phases were applied for the physicochemical properties’ interaction studies. On the air-water interface, the surface properties of monoolein lipids were investigated for interfacial phase behaviors, using the Wilhelmy plate pressure sensor technique compression isotherm (π-A). Data and analysis were also contributed to the correspondent, precise verification of physical state behavior with the surface pressure measurements on the interfaces through the compressibility modulus and the elasticity modulus parameters on the surface. In the experiments, the interfacial activity of the monoolein lipids was found to be stable on the aqueous sub-phase, while the area per molecule over the interface did not have much impact as a sub-phase with a change in salts. The repeatability and reproducibility of tests were affirmed by the difference in the Langmuir monolayer’s particular phase transition orientation behavior and the stability of colloidal lipid dispersion. However, Langmuir monolayer formation contributes to several special groups being restructured and is found to be a more remarkable natural process for their attractive organic dynamic structural properties over the interface, but the interfacial molecular dynamics have proven to be difficult to calculate.

scholarly journals Characterization of Monoolein Langmuir Monolayers Spread at The Salt Solution/Air Interface

2021 ◽  
Author(s):  
Balaji Sopanrao Dhopte ◽  
V. N. Lad
Keyword(s):  
Physicochemical Properties ◽  
Molecular Layer ◽  
Langmuir Monolayers ◽  
Langmuir Monolayer ◽  
Compression Isotherm ◽  
Water Interface ◽  
Air Interface ◽  
Special Groups ◽  
Air Water Interface ◽  
The Difference

Abstract The Langmuir monolayer is commonly described at interfaces for an insoluble homogenous single molecular layer. Langmuir monolayers have demonstrated various issues regarding soft matters and complex fluids by forming ideal uniform two-dimensional structures over the air-water interface. This monolayer has advantages for evaluating physicochemical properties at interfaces and, for the insoluble molecules, can be applied simultaneously to the different interaction occurrences at interfaces. For this experiment, monoolein lipid was used as a spreading solvent to create a Langmuir monolayer, and five different types of salt sub-phases were applied for the physicochemical properties’ interaction studies. On the air-water interface, the surface properties of monoolein lipids were investigated for interfacial phase behaviors, using the Wilhelmy plate pressure sensor technique compression isotherm (π-A). Data and analysis were also contributed to the correspondent, precise verification of physical state behavior with the surface pressure measurements on the interfaces through the compressibility modulus and the elasticity modulus parameters on the surface. In the experiments, the interfacial activity of the monoolein lipids was found to be stable on the aqueous sub-phase, while the area per molecule over the interface did not have much impact as a sub-phase with a change in salts. The repeatability and reproducibility of tests were affirmed by the difference in the Langmuir monolayer’s particular phase transition orientation behavior and the stability of colloidal lipid dispersion. However, Langmuir monolayer formation contributes to several special groups being restructured and is found to be a more remarkable natural process for their attractive organic dynamic structural properties over the interface, but the interfacial molecular dynamics have proven to be difficult to calculate.

Electrochemistry at the water/air interface. Lateral electron transport in Langmuir monolayers

1988 ◽  
Vol 110 (6) ◽  
pp. 2009-2011 ◽  
Author(s):  
Cindra A. Widrig ◽  
Cary J. Miller ◽  
Marcin. Majda
Keyword(s):  
Electron Transport ◽  
Langmuir Monolayers ◽  
Air Interface

scholarly journals Characterization of Monoolein Langmuir Monolayers Spread at The Salt Solution/Air Interface

2021 ◽  
Author(s):  
Balaji Sopanrao Dhopte ◽  
Virangkumar N. Lad
Keyword(s):  
Physicochemical Properties ◽  
Molecular Layer ◽  
Langmuir Monolayers ◽  
Langmuir Monolayer ◽  
Compression Isotherm ◽  
Water Interface ◽  
Air Interface ◽  
Special Groups ◽  
Air Water Interface ◽  
The Difference

Abstract The Langmuir monolayer is commonly described at interfaces for an insoluble homogenous single molecular layer. Langmuir monolayers have demonstrated various issues regarding soft matters and complex fluids by forming ideal uniform two-dimensional structures over the air-water interface. This monolayer has advantages for evaluating physicochemical properties at interfaces and, for the insoluble molecules, can be applied simultaneously to the different interaction occurrences at interfaces. For this experiment, monoolein lipid was used as a spreading solvent to create a Langmuir monolayer, and five different types of salt sub-phases were applied for the physicochemical properties’ interaction studies. On the air-water interface, the surface properties of monoolein lipids were investigated for interfacial phase behaviors, using the Wilhelmy plate pressure sensor technique compression isotherm (π-A). Data and analysis were also contributed to the correspondent, precise verification of physical state behavior with the surface pressure measurements on the interfaces through the compressibility modulus and the elasticity modulus parameters on the surface. In the experiments, the interfacial activity of the monoolein lipids was found to be stable on the aqueous sub-phase, while the area per molecule over the interface did not have much impact as a sub-phase with a change in salts. The repeatability and reproducibility of tests were affirmed by the difference in the Langmuir monolayer’s particular phase transition orientation behavior and the stability of colloidal lipid dispersion. However, Langmuir monolayer formation contributes to several special groups being restructured and is found to be a more remarkable natural process for their attractive organic dynamic structural properties over the interface, but the interfacial molecular dynamics have proven to be difficult to calculate.

TEM characterization of proton-exchanged LiNbO3 optical waveguides

1986 ◽  
Vol 44 ◽  
pp. 480-481
Author(s):  
W. E. Lee
Keyword(s):  
Refractive Index ◽  
Benzoic Acid ◽  
Optical Waveguides ◽  
Total Internal Reflection ◽  
Index Of Refraction ◽  
Optical Measurements ◽  
Lithium Ions ◽  
Wide Channel ◽  
Tem Characterization

An optical waveguide consists of a several-micron wide channel with a slightly different index of refraction than the host substrate; light can be trapped in the channel by total internal reflection.Optical waveguides can be formed from single-crystal LiNbO3 using the proton exhange technique. In this technique, polished specimens are masked with polycrystal1ine chromium in such a way as to leave 3-13 μm wide channels. These are held in benzoic acid at 249°C for 5 minutes allowing protons to exchange for lithium ions within the channels causing an increase in the refractive index of the channel and creating the waveguide. Unfortunately, optical measurements often reveal a loss in waveguiding ability up to several weeks after exchange.

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