Thermodynamic analysis and AFM study of the interaction of palmitic acid with DPPE in Langmuir monolayers

He, Guangxiao; Sun, Run‐Cang; Hao, Changchun; Yang, Jing; Wang, Man; Zhang, Lini

doi:10.1016/j.colsurfa.2013.08.073

Cited by 16 publications

(21 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The AFM methods have been described in detail in previous studies [8,17], and the main steps can be summarized as follows: freshly cleaved mica was used as a supporting solid substrate for film deposition. The mixed monolayers were compressed up to the given surface pressure.…”

Section: Atomic Force Microscopymentioning

confidence: 99%

“…It is well accepted that a completely immiscible monolayer and an ideal mixed film are absolutely opposite [8,24,25]. However, both obey (1).…”

Section: Miscibility Of Binary Monolayersmentioning

confidence: 99%

“…To perform a further analysis of the miscibility of the binary components, exc at a given surface pressure was calculated according to (2) [8,17,25]. Usually, exc can be used for elucidating different molecular interaction and lateral packing as an important physical parameter as well:…”

Section: Miscibility Of Binary Monolayersmentioning

confidence: 99%

“…If exc = 0, it means perfectly miscible or completely immiscible mixed monolayer is observed, and a plot of as a function of 1 (or 2 ) at a given surface pressure would be a straight line, and further measurements are needed to distinguish these two monolayer states. On the contrary, exc ̸ = 0 indicates the miscibility of the mixture and various types of interactions occur in the film [8,24,25]. As a matter of fact, there always exist intermolecular forces between the molecules in a monolayer.…”

Section: Miscibility Of Binary Monolayersmentioning

confidence: 99%

“…It also can achieve the molecular assembly by means of changing the length of hydrophobic chain or insetting ion to operate the structure, film thickness, orientation, and sequences of the monolayer precisely. On the other hand, the AFM has become an important technology which characterizes surface morphology of monolayer by utilizing the atomic interaction between the sample surface and the scanning probe [8].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Interfacial Interactions and Nanostructure Changes in DPPG/HD Monolayer at the Air/Water Interface

Zhu

Sun

Zhang

et al. 2015

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

Lung surfactant (LS) plays a crucial role in regulating surface tension during normal respiration cycles by decreasing the work associated with lung expansion and therefore decreases the metabolic energy consumed. Monolayer surfactant films composed of a mixture of phospholipids and spreading additives are of optional utility for applications in lung surfactant-based therapies. A simple, minimal model of such a lung surfactant system, composed of 1,2-dipalmitoyl-sn-glycero-3-[phosphor-rac-(1-gylcerol)] (DPPG) and hexadecanol (HD), was prepared, and the surface pressure-area (π-A) isotherms and nanostructure characteristics of the binary mixture were investigated at the air/water interface using a combination of Langmuir-Blodgett (LB) and atomic force microscopy (AFM) techniques. Based on the regular solution theory, the miscibility and stability of the two components in the monolayer were analyzed in terms of compression modulus (Cs-1) , excess Gibbs free energy (ΔGexcπ) , activity coefficients (γ), and interaction parameter (ξ). The results of this paper provide valuable insight into basic thermodynamics and nanostructure of mixed DPPG/HD monolayers; it is helpful to understand the thermodynamic behavior of HD as spreading additive in LS monolayer with a view toward characterizing potential improvements to LS performance brought about by addition of HD to lung phospholipids.

show abstract

Section: Atomic Force Microscopymentioning

confidence: 99%

“…It is well accepted that a completely immiscible monolayer and an ideal mixed film are absolutely opposite [8,24,25]. However, both obey (1).…”

Section: Miscibility Of Binary Monolayersmentioning

confidence: 99%

Section: Miscibility Of Binary Monolayersmentioning

confidence: 99%

Section: Miscibility Of Binary Monolayersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interfacial Interactions and Nanostructure Changes in DPPG/HD Monolayer at the Air/Water Interface

Zhu

Sun

Zhang

et al. 2015

Journal of Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

Morphological and Interaction Characteristics of Surface‐Active Ionic Liquids and Palmitic Acid in Mixed Monolayers

et al. 2020

View full text Add to dashboard Cite

A series of water soluble, surface‐active ionic liquids (SAILs), namely, 1‐alkyl‐3‐methyl imidazolium chlorides ([Cn‐mim]Cl) and their mixtures with palmitic acid (PA) are investigated in Langmuir monolayers and Langmuir–Blodgett films. It is inferred from the surface pressure‐area isotherms that C16‐mim‐IL mixes non‐ideally with PA and stabilizes the binary mixed films. In addition, the residence of mim‐IL at the water surface is enhanced as a function of the increasing alkyl side chain length. Generally, the compressional moduli values decrease upon increasing the content of the mim‐ILs over a wide range of compositions. Furthermore, film relaxation measurements indicate that the IL component is selectively excluded from the mixed films upon achieving a certain target pressure. Brewster angle microscope images demonstrate minimal changes on the PA domains in the presence of either C4‐ and C8‐mim‐ILs, whereas presence of the hexadecyl counterpart results in the formation of condensed sheets. Atomic force microscopy imaging of deposited films show the formation of propeller‐like aggregates when C8‐ or C16‐mim‐IL is present in the mixed films.

show abstract

Study of the evaporation kinetics of pure and binary droplets: volatility effect

et al. 2021

View full text Add to dashboard Cite

Thermodynamic analysis and AFM study of the interaction of palmitic acid with DPPE in Langmuir monolayers

Cited by 16 publications

References 52 publications

Interfacial Interactions and Nanostructure Changes in DPPG/HD Monolayer at the Air/Water Interface

Interfacial Interactions and Nanostructure Changes in DPPG/HD Monolayer at the Air/Water Interface

Morphological and Interaction Characteristics of Surface‐Active Ionic Liquids and Palmitic Acid in Mixed Monolayers

Study of the evaporation kinetics of pure and binary droplets: volatility effect

Contact Info

Product

Resources

About