Skip to main content

NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Moisture Absorption and Absorption Kinetics in Polyelectrolyte Films: Influence of Film Thickness

Published

Author(s)

B D. Vogt, Christopher L. Soles, Hae-Jeong Lee, Eric K. Lin, Wen-Li Wu

Abstract

Specular x-ray reflectivity (XR) and quartz crystal microbalance (QCM) measurements were used to determine the absorption of water into thin poly(4-ammonium styrenesulfonic acid) films from saturated vapor at 25 ?C. The effect of film thickness on the absorption kinetics and overall absorption was investigated in the range of thickness from 3 to 200 nm. The equilibrium swelling of all the films irrespective of film thickness was 0.57 ? 0.03 volume fraction from both QCM and XR measurements. Although the equilibrium absorption is independent of thickness, the absorption kinetics substantially decrease for film thickness less than 100 nm. For the thinnest film (3 nm), there is a five order of magnitude decrease in the diffusion coefficient for water as determined by the absorption measurements.
Citation
Langmuir
Volume
20
Issue
No. 4

Keywords

absorption, thin films

Citation

Vogt, B. , Soles, C. , Lee, H. , Lin, E. and Wu, W. (2004), Moisture Absorption and Absorption Kinetics in Polyelectrolyte Films: Influence of Film Thickness, Langmuir, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852219 (Accessed October 13, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created February 1, 2004, Updated February 17, 2017
Was this page helpful?