Micropatterned polyvinyl butyral membrane for acid-base diodes

László Roszol, Thuy Lawson, Viktória Koncz, Zoltán Noszticzius, Maria Wittmann, Tamás Sarkadi, Pál Koppa

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Until now, polyvinyl alcohol (PVA) gel cylinders have been used in electrolyte diodes as a connecting element between the acidic and alkaline reservoirs. In this paper, a new connecting element is reported: a breath figure templated polyvinyl butyral (PVB) membrane prepared with dip-coating from a dichloromethane solution of the polymer in a humid atmosphere. The procedure gives a 1.5-2 μm thick membrane with a hexagonal pattern, the average characteristic length of which is 1 μm. After an acidic etching, it was found to be a good connecting element. The voltage-current characteristics and dynamic properties of PVA and PVB were measured and compared. The PVB membrane has a faster response to voltage changes than the PVA gel, but in both cases, there was a slow drift in the current that prevented it from reaching a steady state. Reproducible characteristics can be obtained, however, after the current reaches a well-defined quasi-steady state.

Original languageEnglish
Pages (from-to)13718-13725
Number of pages8
JournalJournal of Physical Chemistry B
Volume114
Issue number43
DOIs
Publication statusPublished - Nov 4 2010

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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