Water distribution in multilayers of weak polyelectrolytes

Oleh M. Tanchak; Kevin G. Yager; Helmut Fritzsche; Thad Harroun; John Katsaras; Christopher J. Barrett

doi:10.1021/la0529613

Water distribution in multilayers of weak polyelectrolytes

Oleh M. Tanchak, Kevin G. Yager, Helmut Fritzsche, Thad Harroun, John Katsaras, Christopher J. Barrett

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53 Scopus citations

Abstract

The water localization in thin polyelectrolyte multilayers assembled from poly(acrylic acid) and poly(allylamine hydrochloride) was investigated with neutron reflectivity in an atmosphere of controlled humidity and with bulk water. Water was found to be distributed asymmetrically within the multilayer and to localize preferentially at the polymer surface. The diffusion of water into the multilayer did not completely penetrate to the substrate, but instead there appeared to be an exclusion zone near the Si substrate. These results help to explain previous observations of anomalous water transport kinetics in weak polyelectrolyte systems.

Original language	English
Pages (from-to)	5137-5143
Number of pages	7
Journal	Langmuir
Volume	22
Issue number	11
DOIs	https://doi.org/10.1021/la0529613
State	Published - May 23 2006
Externally published	Yes

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10.1021/la0529613

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abstract = "The water localization in thin polyelectrolyte multilayers assembled from poly(acrylic acid) and poly(allylamine hydrochloride) was investigated with neutron reflectivity in an atmosphere of controlled humidity and with bulk water. Water was found to be distributed asymmetrically within the multilayer and to localize preferentially at the polymer surface. The diffusion of water into the multilayer did not completely penetrate to the substrate, but instead there appeared to be an exclusion zone near the Si substrate. These results help to explain previous observations of anomalous water transport kinetics in weak polyelectrolyte systems.",

author = "Tanchak, {Oleh M.} and Yager, {Kevin G.} and Helmut Fritzsche and Thad Harroun and John Katsaras and Barrett, {Christopher J.}",

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T1 - Water distribution in multilayers of weak polyelectrolytes

AU - Tanchak, Oleh M.

AU - Yager, Kevin G.

AU - Fritzsche, Helmut

AU - Harroun, Thad

AU - Katsaras, John

AU - Barrett, Christopher J.

PY - 2006/5/23

Y1 - 2006/5/23

N2 - The water localization in thin polyelectrolyte multilayers assembled from poly(acrylic acid) and poly(allylamine hydrochloride) was investigated with neutron reflectivity in an atmosphere of controlled humidity and with bulk water. Water was found to be distributed asymmetrically within the multilayer and to localize preferentially at the polymer surface. The diffusion of water into the multilayer did not completely penetrate to the substrate, but instead there appeared to be an exclusion zone near the Si substrate. These results help to explain previous observations of anomalous water transport kinetics in weak polyelectrolyte systems.

AB - The water localization in thin polyelectrolyte multilayers assembled from poly(acrylic acid) and poly(allylamine hydrochloride) was investigated with neutron reflectivity in an atmosphere of controlled humidity and with bulk water. Water was found to be distributed asymmetrically within the multilayer and to localize preferentially at the polymer surface. The diffusion of water into the multilayer did not completely penetrate to the substrate, but instead there appeared to be an exclusion zone near the Si substrate. These results help to explain previous observations of anomalous water transport kinetics in weak polyelectrolyte systems.

UR - http://www.scopus.com/inward/record.url?scp=33745742576&partnerID=8YFLogxK

U2 - 10.1021/la0529613

DO - 10.1021/la0529613

M3 - Article

C2 - 16700605

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SN - 0743-7463

VL - 22

SP - 5137

EP - 5143

JO - Langmuir

JF - Langmuir

IS - 11

ER -

Water distribution in multilayers of weak polyelectrolytes

Abstract

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