Polymer-graphene oxide quadlayer thin-film assemblies with improved gas barrier. Academic Article uri icon


  • Layer-by-layer assembly was used to create quadlayers (QLs) of chitosan (CH), poly(acrylic acid) (PAA), CH, and graphene oxide (GO). Electron microscopy confirmed GO coverage over the film and a highly ordered nanobrick wall structure. By varying pH deviation between CH and PAA, a thick and interdiffused polymer matrix was created because of the altered chain conformation. A 5 CH (pH 5.5)/PAA (pH 3)/CH (pH 5.5)/GO QL assembly (48 nm) exhibits very low oxygen permeability (3.9 10(-20) cm(3) cm cm(-2) Pa(-1) s(-1)) that matches SiOx barrier coatings. In an effort to maintain barrier performance under high humidity, GO was thermally reduced to increase hydrophobicity of the film. This reduction step increased H2/CO2 selectivity of a 5 QL film from 5 to 215, exceeding Robeson's upper bound limit. This unique water-based multilayer nanocoating is very promising for a variety of gas purification and packaging applications.

published proceedings

  • Langmuir

altmetric score

  • 0.5

author list (cited authors)

  • Tzeng, P., Stevens, B., Devlaming, I., & Grunlan, J. C.

citation count

  • 58

complete list of authors

  • Tzeng, Ping||Stevens, Bart||Devlaming, Ian||Grunlan, Jaime C

publication date

  • June 2015