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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1021/la104809z
|2 doi
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|a pubmed24n0689.xml
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|a (DE-627)NLM206759975
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|a (NLM)21417346
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Lefort, M
|e verfasserin
|4 aut
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|a Simultaneous spray coating of interacting species
|b general rules governing the poly(styrene sulfonate)/poly(allylamine) system
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 26.08.2011
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|a Date Revised 21.11.2013
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a © 2011 American Chemical Society
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|a Simultaneous spraying of two solutions of interacting species onto a substrate held vertically leads to the formation of nanometer-sized coatings. Here we investigate the simultaneous spraying of poly(styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) solutions leading to the formation of a film composed of PSS/PAH complexes. The thickness of this film increases linearly with the cumulative spraying time. For a given spraying rate of PAH (respectively PSS), the growth rate of the film depends strongly upon the PSS/PAH ratio and passes through a maximum for a PSS/PAH ratio lying between 0.55 and 0.8. For a PSS/PAH ratio that is maintained constant, the growth speed of the film increases linearly with the spraying rate of polyelectrolyte of both solutions. Using X-ray photoelectron spectroscopy, we find that the film composition is almost independent of the PSS/PAH (spayed) ratio, with composition very close to 1:1 in PSS:PAH film. The 1:1 PSS:PAH composition is explained by the fact that the simultaneous spraying experiments are carried out with salt-free solutions; thus, electroneutrality in the film requires exact matching of the charges carried by the polyanions and the polycations. Zeta potential measurements reveal that, depending on whether the PSS/PAH spraying rate ratio lies below or above the optimal spraying rate ratio, the film acquires a positive or a negative excess charge. We also find that the overall film morphology, investigated by AFM, is independent of the spraying rate ratio and appears to be composed of nanometer-sized grains which are typically in the 100 nm range
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|a Journal Article
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|a Polymers
|2 NLM
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|a Polystyrenes
|2 NLM
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|a Allylamine
|2 NLM
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|a 48G762T011
|2 NLM
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|a Boulmedais, F
|e verfasserin
|4 aut
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|a Jierry, L
|e verfasserin
|4 aut
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|a Gonthier, E
|e verfasserin
|4 aut
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|a Voegel, J C
|e verfasserin
|4 aut
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|a Hemmerlé, J
|e verfasserin
|4 aut
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|a Lavalle, Ph
|e verfasserin
|4 aut
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|a Ponche, A
|e verfasserin
|4 aut
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|a Schaaf, P
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1999
|g 27(2011), 8 vom: 19. Apr., Seite 4653-60
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
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| 773 |
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|g volume:27
|g year:2011
|g number:8
|g day:19
|g month:04
|g pages:4653-60
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|u http://dx.doi.org/10.1021/la104809z
|3 Volltext
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