The effect of support material and conditioning on wettability of PAH/PSS multilayer films

Kolasińska, Marta; Warszyński, Piotr

doi:10.1016/j.bioelechem.2004.03.009

Cited by 67 publications

(59 citation statements)

References 11 publications

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“…It should be noted that the structures of these adsorbed polyelectrolyte films are strongly dependent on the deposition conditions, particularly the pH and ionic strengths of the buffer solutions. Other than the adsorption conditions, the effects of pH of the conditioning solutions are also known to be important on the polyelectrolyte structures and their degree of dissociation [47]. Therefore, changes in m EOF with changes in the pH of the conditioning solutions are to be expected.…”

Section: Wet Chemistrymentioning

confidence: 98%

“…In the physical adsorption studies, both PAH and PEI solutions were prepared in 150 mM PBS and adsorbed on pp.AAc surfaces at pH 5.0 and 7.0, respectively [32,33]. Surfaces formed in high-molarity buffer were expected to be more homogeneous, as small ions may interact with the adsorbed polymer films, which result in structural changes of the resulting films [47]. It should be noted that the structures of these adsorbed polyelectrolyte films are strongly dependent on the deposition conditions, particularly the pH and ionic strengths of the buffer solutions.…”

Section: Wet Chemistrymentioning

confidence: 99%

“…PAH and PEI are weak cationic polyelectrolytes used largely in layer-by-layer deposition of charged coatings [47]. PEI is a highly branched polymer, which consists of primary, secondary and tertiary amines with a ratio of 1:2:1 (pK a value $10.0-11.0) [48].…”

Section: Wet Chemistrymentioning

confidence: 99%

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Studies of electroosmotic flow and the effects of protein adsorption in plasma‐polymerized microchannel surfaces

2009

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This paper presents a study of EOF properties of plasma-polymerized microchannel surfaces and the effects of protein (fibrinogen and lysozyme) adsorption on the EOF behavior of the surface-modified microchannels. Three plasma polymer surfaces, i.e. tetraglyme, acrylic acid and allylamine, are tested. Results indicate EOF suppression in all plasma-coated channels compared with the uncoated glass microchannel surfaces. The EOF behaviors of the modified microchannels after exposure to protein solutions are also investigated and show that even low levels of protein adsorption can significantly influence EOF behavior, and in some cases, result in the reversal of flow. The results also highlight that EOF measurement can be used as a method for detecting the presence of proteins within microchannels at low surface coverage (<1 ng/cm(2) on glass). Critically, the results illustrate that the non-fouling tetraglyme plasma polymer is able to sustain EOF. Comparison of the plasma-polymerized surfaces with conventionally grafted polyelectrolyte surfaces demonstrates the stabilities of the plasma polymer films, enabling multiple EOF runs over 3 days without deterioration in performance. The results of this study clearly demonstrate that plasma polymers enable the surface chemistry of microfluidic devices to be tailored for specific applications. Critically, the deposition of the non-fouling tetraglyme coating enables stable EOF to be induced in the presence of protein.

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Section: Wet Chemistrymentioning

confidence: 98%

Section: Wet Chemistrymentioning

confidence: 99%

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Studies of electroosmotic flow and the effects of protein adsorption in plasma‐polymerized microchannel surfaces

2009

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“…that the hydrophilicity of the membrane with a PSS top layer was higher than that with a PAH top layer, for both ACS and AMX membranes. This occurs because the hydrophilicity of PAH is lower than that of PSS 19) .…”

Section: Atr-ftir Spectroscopy -Potential and Water Contact Anglementioning

confidence: 99%

“…The properties of an LbL multilayer depend on the properties of the substrate surface on which the LbL layers are fabricated for the first several layer pairs 19) .…”

mentioning

confidence: 99%