Reflection of light from the air/water interface covered with sea-surface microlayers

Kozarac, Zlatica; Risović, Dubravko; Frka, Sanja; Möbius, Dietmar

doi:10.1016/j.marchem.2004.12.003

Cited by 21 publications

(22 citation statements)

References 29 publications

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“…The high proportion of surfactant-resistant bacterioneuston documented in this study can also reflect an adaptation to high levels of surfactants from natural and anthropogenic origins that accumulate at the air-water interface [38,61]. The samples of SML were collected near a commercial port located in Ria de Aveiro lagoon/estuary, a shipyard and a densely populated urban area.…”

Section: Surfactant-resistant Pseudomonads From the Sml 287mentioning

confidence: 80%

Isolation of Surfactant-Resistant Pseudomonads from the Estuarine Surface Microlayer

Louvado

Coelho²,

Domingues³

et al. 2012

J. Microbiol. Biotechnol.

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Section: Surfactant-resistant Pseudomonads From the Sml 287mentioning

confidence: 80%

Isolation of Surfactant-Resistant Pseudomonads from the Estuarine Surface Microlayer

Louvado

Coelho²,

Domingues³

et al. 2012

J. Microbiol. Biotechnol.

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“…33 In twodimensional condensed systems the occurrence of a minimum, if not of the discontinuity, in κ s positioned exactly at the critical concentration has been interpreted as a thermodynamic signature of an interaction-driven phase transition 39,40 predicted and discussed in theoretical works. 46 It can provide information on monolayer growth [20][21][22] or on subtle structural changes such as those related to molecular reorientation in a surface adlayer 47,48 or even on mechanisms responsible for the formation of a considered structure. Generally, the concept of fractal dimension proved to be efficient in the description of complex morphologies through the use of a single topography descriptor-the fractal dimension of the surface.…”

Section: Theorymentioning

confidence: 99%

“…18,19 In recent years the application of Brewster angle microscopy 20,21 for in situ characterization of the monolayer morphologies at the air-water interface has enabled visualization of a large variety of monolayer structures. 18,19 In recent years the application of Brewster angle microscopy 20,21 for in situ characterization of the monolayer morphologies at the air-water interface has enabled visualization of a large variety of monolayer structures.…”

Section: Introductionmentioning

confidence: 99%

Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers

Risović

Frka²,

Kozarac³

2011

The Journal of Chemical Physics

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The aim of this study was to investigate the connection between the lipid/amphiphile monolayer structure at the interface and its macroscopic/rheological properties, in particular, to establish the link between the fractality of the monolayer structure and its compressibility modulus. To that purpose we have used fractal analysis of images obtained by Brewster angle microscopy to infer the fractal dimension of the monolayer structure and relate its change to the corresponding changes in compressibility derived from a simultaneously measured π-A isotherm. The results of the study confirmed the starting assumption based on theoretical considerations that the fractal dimension of an amphiphilic monolayer and its compressibility should be correlated. We have shown that there exists a strong correlation between the fractal dimension and the corresponding compressibility modulus of different amphiphilic materials. Thus, confirming the link between the short ordered structure on the molecular level and the macroscopic property-compressibility of the monolayer. The established correlation between the fractal dynamics and compressibility modulus of the monolayer enabled identification of onset of percolation-a second-order phase transition that is otherwise not easy and unambiguously detectable. We have found that the signature of percolation in a monolayer, regardless of its composition, is the occurrence of a sharp increase (a jump) of compressibility modulus (at macroscopic level) at the characteristic value of the corresponding fractal dimension D = 1.89. This is the result of the abrupt establishment of a connected structure on the molecular level, consequently involving a change in the elastic properties of the monolayer on a macroscopic scale. The results of this investigation provide means for unambiguous identification of the onset of percolation in the Langmuir layer and should facilitate a more efficient application of the percolation theory in further study of processes and structures at the interface during the monolayer compression.

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“…thin films at the air/solution interface) is required, X-ray reflectometry and grazing incidence X-ray diffraction (GID) 1 should be considered, as they probe the surface in its normal direction and in plane, respectively [17][18][19]. Several microscopy techniques can also be useful for analysis of surface and film morphologies [20,21], among which Brewster angle microscopy (BAM) has demonstrated advantages for inspecting thin films and monolayers [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Multiple thin film formation from dilute mixtures of polyethyleneimine (PEI) and cetyltrimethylammonium bromide (CTAB)

Comas-Rojas

Fernández-Catá

Edler

et al. 2009

Journal of Colloid and Interface Science

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Reflection of light from the air/water interface covered with sea-surface microlayers

Cited by 21 publications

References 29 publications

Isolation of Surfactant-Resistant Pseudomonads from the Estuarine Surface Microlayer

Isolation of Surfactant-Resistant Pseudomonads from the Estuarine Surface Microlayer

Application of Brewster angle microscopy and fractal analysis in investigations of compressibility of Langmuir monolayers

Multiple thin film formation from dilute mixtures of polyethyleneimine (PEI) and cetyltrimethylammonium bromide (CTAB)

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