Monolayer properties of alkylammonium perfluoroalkanoates on concentrated sodium chloride solution

Shibata, Osamu; Furuya, Hirotaka; Moroi, Yoshikiyo; Saito, Masahiko; Matuura, Ryôhei

doi:10.1016/s0040-6090(98)00612-9

Cited by 7 publications

(4 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The surface pressure of the monolayer, π, was measured using an automated Langmuir film balance, which was the same as that used in the previous studies . The surface pressure balance (Chan RG, Langmuir float type) has a resolution of 0.01 mN m -1 .…”

Section: Methodsmentioning

confidence: 99%

“…The standard deviation for area measurements was approximately 1.00 × 10 -2 nm 2 , and that for surface potential measurements was 10 mV. Other experimental conditions were the same as described in the previous papers 1 Surface pressure ( π )−area ( A ) isotherms (a), surface potential (Δ V )− A isotherms (b), and surface dipole moment ( μ ⊥ )− A isotherms (c) of F8C5PC and F8C5OH on 0.15 M NaCl at 293.2 K. …”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Mixed Langmuir Monolayers Made from Single-Chain Perfluoroalkylated Amphiphiles

Shibata

Krafft

2000

Langmuir

Self Cite

View full text Add to dashboard Cite

Surface pressure (π)-area (A), surface potential (∆V)-area, and dipole moment (µ⊥)-area isotherms were obtained for Langmuir monolayers made from (perfluorooctyl) pentylphosphocholine (F8C5PC), (perfluorooctyl) pentanol (F8C5OH), and their combinations. Monolayers were spread on a 0.15 M NaCl subphase. Surface potentials were analyzed using the three-layer model proposed by Demchak and Fort. The contributions of the CF3 ω-group and the phosphocholine (PC) headgroup to the vertical component of the dipole moment µ⊥ were estimated to be -2.5 and 3.3 D, respectively. The miscibility of F8C5PC and F8C5OH in the mixed monolayers was examined by plotting the variation of the molecular area, surface potential, and dipole moment as a function of the F8C5OH molar fraction, using the additivity rule. Negative deviations to the linearity of the molecular area were observed at various surface pressures (5, 15, 25, and 35 mN m -1 ), showing partial miscibility with attractive interaction between the monolayers' components. Assuming a regular surface mixture, the Joos equation, which was used to describe the collapse pressure of mixed monolayers with miscible components, allowed calculation of the interaction parameter ( ) -0.52) and the interaction energy (210 J/mol) between the two fluorinated amphiphiles.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Mixed Langmuir Monolayers Made from Single-Chain Perfluoroalkylated Amphiphiles

Shibata

Krafft

2000

Langmuir

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition to the chain conformation and packing, the dynamic properties of perfluorocarbon monolayers differ from their hydrocarbon counterparts. Whereas alkane SAMs undergo chain length dependent, reversible chain melting transitions, the large energy barrier to C−C bond rotations of the perfluoroalkanes renders these chains less flexible. , Langmuir monolayers − and SAMs , of perfluoro fatty acids have been studied both experimentally and theoretically, − and there are a few reports of gold and silver nanoparticles functionalized with fluorocarbon chains. − In one study, gold particles of 3 nm diameter with fluorocarbon chains attached via CH 2 CH 2 SH linker groups were found to pack hexagonally . The interparticle spacing was determined to be slightly smaller than the bimolecular length, which was taken as evidence of interpenetration of chain ends.…”

Section: Introductionmentioning

confidence: 99%

Particle−Particle Interactions and Chain Dynamics of Fluorocarbon and Hydrocarbon Functionalized ZrO₂ Nanoparticles

2008

View full text Add to dashboard Cite

The chain conformation and dynamics of hydrocarbon and perfluorocarbon fatty acids adsorbed on 4 nm ZrO2 particles were characterized by solid-state 13C chemical shift and 19F NMR relaxation measurements, respectively, and compared to those from previous studies on lower surface area fumed metal oxide powders. The interdigitation of chains between neighboring particles, which increases with chain length, can be detected from the splitting of the 13C NMR and 19F NMR signals of the CH3 and CF3 groups, respectively. Similar to the case of alkanethiol self-assembled monolayers (SAMs) on gold nanoparticles, this interdigitation allows for efficient chain packing despite the high surface curvature. The hydrocarbon chains on the ZrO2 nanoparticles are more ordered, and the reversible chain length dependent order-disorder transition temperatures are elevated relative to those of the same fatty acids adsorbed on fumed ZrO2 powder. Likewise, the 19F spin lattice relaxation times of the fluorocarbon chains approach those of the bulk acids with increasing chain length and interdigitation, indicating densely packed chains.

show abstract

“…The isotherms in the DPPCrich region resembled the isotherm of pure DPPC; however, the phase-transition plateaus became shorter with increasing amounts of IPL, again supporting the enhancing effect of IPL on the interfacial behavior of DPPC. Although the maximum pressures reached were higher in the presence of the PBS subphase, the corresponding area values changed because the electrostatic interactions between the head groups of IPL were weaker [45]. It was observed that the isotherms in the DPPC-poor region shift toward smaller areas when compared to the water subphase.…”

Section: -A Isotherms Of Dppc Ipl and Their Mixturesmentioning

confidence: 96%

Restoration of the interfacial properties of lung surfactant with a newly designed hydrocarbon/fluorocarbon lipid

Dilli

Unsal

Uslu

et al. 2014

Colloids and Surfaces B: Biointerfaces

View full text Add to dashboard Cite

Monolayer properties of alkylammonium perfluoroalkanoates on concentrated sodium chloride solution

Cited by 7 publications

References 31 publications

Mixed Langmuir Monolayers Made from Single-Chain Perfluoroalkylated Amphiphiles

Mixed Langmuir Monolayers Made from Single-Chain Perfluoroalkylated Amphiphiles

Particle−Particle Interactions and Chain Dynamics of Fluorocarbon and Hydrocarbon Functionalized ZrO₂ Nanoparticles

Restoration of the interfacial properties of lung surfactant with a newly designed hydrocarbon/fluorocarbon lipid

Contact Info

Product

Resources

About

Monolayer properties of alkylammonium perfluoroalkanoates on concentrated sodium chloride solution

Cited by 7 publications

References 31 publications

Mixed Langmuir Monolayers Made from Single-Chain Perfluoroalkylated Amphiphiles

Mixed Langmuir Monolayers Made from Single-Chain Perfluoroalkylated Amphiphiles

Particle−Particle Interactions and Chain Dynamics of Fluorocarbon and Hydrocarbon Functionalized ZrO2 Nanoparticles

Restoration of the interfacial properties of lung surfactant with a newly designed hydrocarbon/fluorocarbon lipid

Contact Info

Product

Resources

About

Particle−Particle Interactions and Chain Dynamics of Fluorocarbon and Hydrocarbon Functionalized ZrO₂ Nanoparticles