Pressure--Area Relations of Fatty Acid and Alcohol Monolayers

Nutting, G. C.; Harkins, William D.

doi:10.1021/ja01874a050

Cited by 82 publications

(36 citation statements)

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“…The isotherm of a PA monolayer is shown in Figure 2. Results reported here are consistent with previous studies [8,60,61]. The regions in the isotherm have previously been attributed to the gas-tilted condensed (G-TC) coexistence region, tilted condensed (TC), untilted condensed (UC), and collapse phases [36,62].…”

Section: Surface Pressure-area Isothermssupporting

confidence: 92%

Palmitic Acid on Salt Subphases and in Mixed Monolayers of Cerebrosides: Application to Atmospheric Aerosol Chemistry

Adams

Allen

2013

Atmosphere

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Palmitic acid (PA) has been found to be a major constituent in marine aerosols, and is commonly used to investigate organic containing atmospheric aerosols, and is therefore used here as a proxy system. Surface pressure-area isotherms (π-A), Brewster angle microscopy (BAM), and vibrational sum frequency generation (VSFG) were used to observe a PA monolayer during film compression on subphases of ultrapure water, CaCl 2 and MgCl 2 aqueous solutions, and artificial seawater (ASW). π-A isotherms indicate that salt subphases alter the phase behavior of PA, and BAM further reveals that a condensation of the monolayer occurs when compared to pure water. VSFG spectra and BAM images show that Mg . π-A isotherms and BAM were also used to monitor mixed monolayers of PA and cerebroside, a simple glycolipid. Results reveal that PA also has a condensing effect on the cerebroside monolayer. Thermodynamic analysis indicates that attractive interactions between the two components exist; this may be due to hydrogen bonding of the galactose and carbonyl headgroups. BAM images of the collapse structures show that mixed monolayers of PA and cerebroside are miscible at all surface pressures. These results suggest that the surface morphology of organic-coated aerosols is influenced by the chemical composition of the aqueous core and the organic film itself.

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Section: Surface Pressure-area Isothermssupporting

confidence: 92%

Palmitic Acid on Salt Subphases and in Mixed Monolayers of Cerebrosides: Application to Atmospheric Aerosol Chemistry

Adams

Allen

2013

Atmosphere

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“…Even a cursory investigation, however, reveals that the literature is replete with discrepancies, contradictions, and lack of agreement between and among researchers (7)(8)(9)(10)(11)(12)(13)(14)(15)(16). Most of these are due to the diverse experimental techniques Downloaded by [University of Sussex Library] at 13:24 22 June 2016 employed, and the inability of workers to recognize and to control the factors affecting the measurements.…”

Section: Cratinmentioning

confidence: 99%

Mathematical Modeling of Some pH-Dependent Surface and Interfacial Properties of Stearic Acid

Cratin

1993

Journal of Dispersion Science and Technology

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Mathematical models to account for the dependence on sub-phase pH of numerous surface and interfacial properties of stearic acid are proposed. They describe quantitatively the variations in cross-sectional molecular areas and twodimensional transition and collapse pressures (as determined using LangmuirBlodgett techniques), and interfacial tensions and activities (using the conventional duNoOy apparatus). Species arising as a result of acid-base dissociations have been shown to coexist independently at air/water and oil/water interfaces over the entire range of pH studied.Correspondence between theory and experiment based on correlation coefficients of linear regression analyses is excellent: R-square values range from 0.93 to 0.99. Additional evidence for the correctness of the model is gained from an application of the Phase Rule of Gibbs to two-dimensional systems.From a knowledge of (1) the apparent surface pK a values (from surface pressure-pH data) and (2) the distribution coefficient describing the partitioning of hydrogen ions between the aqueous phase and the surface (from surface potential data) absolute surface pK a values are calculated.Interfacial pK a values are obtained in a similar manner. 559

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“…Good agreement between our data and the reference values indicates that the insoluble monolayer used in this study was under equilibrium spreading pressure. The molecular surface areas at ESPs were roughly 20 Å 2 /molec for longer alkanols (closely packed state) at 298.2 K [21][22][23]. Therefore, they could reduce the evaporation rate significantly.…”

Section: Resultsmentioning

confidence: 99%

Study on water evaporation through 1-alkanol monolayers by the thermogravimetry method

Rusdi

Moroi

2004

Journal of Colloid and Interface Science

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Pressure--Area Relations of Fatty Acid and Alcohol Monolayers

Cited by 82 publications

References 0 publications

Palmitic Acid on Salt Subphases and in Mixed Monolayers of Cerebrosides: Application to Atmospheric Aerosol Chemistry

Palmitic Acid on Salt Subphases and in Mixed Monolayers of Cerebrosides: Application to Atmospheric Aerosol Chemistry

Mathematical Modeling of Some pH-Dependent Surface and Interfacial Properties of Stearic Acid

Study on water evaporation through 1-alkanol monolayers by the thermogravimetry method

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