Using Indentation to Quantify Transport Properties of Nanophase-Segregated Polymer Thin Films.

Nadermann, Nichole K; Davis, Eric M; Page, Kirt A; Stafford, Christopher M; Chan, Edwin P · Adv Mater · 2015

basic_science · Level V

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Abstract

Indentation of hydrated Nafion thin films reveals that both the in-plane diffusivity of water and the intrinsic permeability of the phase-segregated network decrease dramatically with decreasing film thickness. Using pore-network theory, this decrease in diffusivity is attributed to both an increase in ionic-domain heterogeneity and a reduction in ionic-domain connectivity upon confinement.

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