Surface thermodynamic properties of polyelectrolyte multilayers

Köstler, Stefan; Delgado, A.V.; Ribitsch, Volker

doi:10.1016/j.jcis.2005.01.039

Cited by 51 publications

(37 citation statements)

References 31 publications

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“…The width of current profile just indicates the time enough for a sensor-target vapor pair to get equilibrium. [36]. The chemical reaction of PB formation can be expressed below [42].…”

Section: Methodsmentioning

confidence: 99%

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Synthesis and stabilization of Prussian blue nanoparticles and application for sensors

Hornok

Dékány

2007

Journal of Colloid and Interface Science

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“…The width of current profile just indicates the time enough for a sensor-target vapor pair to get equilibrium. [36]. The chemical reaction of PB formation can be expressed below [42].…”

Section: Methodsmentioning

confidence: 99%

“…The method is adapted from the preparation route of inorganic particle films developed by Iler et al and polyelectrolyte films reported by Decher et al [33,34]. Structural, thermal [35] and surface thermodynamic properties [36] of the prepared films were studied.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and stabilization of Prussian blue nanoparticles and application for sensors

Hornok

Dékány

2007

Journal of Colloid and Interface Science

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“…28 Thermodynamic properties at the PEM-liquid interface have been characterized using the Van Oss approach to describe the assembly process but, to our knowledge, have not been applied in the context of microbe-water-PEM (MWP) interactions. 49 The surface interaction energies ∆G MWP for all PEM substrata considered narrowly ranged from 26-29 mJ/m 2 and were statistically indistinguishable (see Supporting Information for the component determinants of ∆G MWP ).…”

Section: Characterization Of Polymeric Substrata Propertiesmentioning

confidence: 97%

Substrata Mechanical Stiffness Can Regulate Adhesion of Viable Bacteria

et al. 2008

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The competing mechanisms that regulate adhesion of bacteria to surfaces and subsequent biofilm formation remain unclear, though nearly all studies have focused on the role of physical and chemical properties of the material surface. Given the large monetary and health costs of medical-device colonization and hospital-acquired infections due to bacteria, there is considerable interest in better understanding of material properties that can limit bacterial adhesion and viability. Here we employ weak polyelectrolyte multilayer (PEM) thin films comprised of poly(allylamine) hydrochloride (PAH) and poly(acrylic acid) (PAA), assembled over a range of conditions, to explore the physicochemical and mechanical characteristics of material surfaces controlling adhesion of Staphylococcus epidermidis bacteria and subsequent colony growth. Although it is increasingly appreciated that eukaryotic cells possess subcellular structures and biomolecular pathways to sense and respond to local chemomechanical environments, much less is known about mechanoselective adhesion of prokaryotes such as these bacteria. We find that adhesion of viable S. epidermidis correlates positively with the stiffness of these polymeric substrata, independently of the roughness, interaction energy, and charge density of these materials. Quantitatively similar trends observed for wild-type and actin analogue mutant Escherichia coli suggest that these results are not confined to only specific bacterial strains, shapes, or cell envelope types. These results indicate the plausibility of mechanoselective adhesion mechanisms in prokaryotes and suggest that mechanical stiffness of substrata materials represents an additional parameter that can regulate adhesion of and subsequent colonization by viable bacteria.

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“…Electrokinetic measurements, such as streaming potential and membrane potential, represent another alternative to these techniques since they may be used for studying in situ formation of polyelectrolyte multilayer films on solid substrates [20,31,32]. Moreover, since these electrokinetic measurements had already been successfully used to characterize the charge properties of organic membranes [33][34][35][36][37][38], it was decided to use them to follow in situ formation of poly(allylamine hydrochloride)/poly(sodium 4-styrene sulfonate) multilayers on an organic polyethersulfone membrane. More precisely, tangential streaming potential measurements were used to determine the modification of charge of the outer surface of the membrane, while potential membrane measurements were used to assess the charge of its pore walls.…”

Section: Introductionmentioning

confidence: 99%