Macromolecular Research

, Volume 13, Issue 3, pp 265–272 | Cite as

Humidity-sensitive properties of self-assembled polyelectrolyte system

  • Chil-Won Lee
  • Jong-Gyu Kim
  • Myoung-Seon Gong


Polyelectrolyte membranes for humidity-sensing were fabricated using a layer-by-layer adsorption process based on the spontaneous self-assembly of alternating layers of cationic and anionic polymers on a silanized ITO patterned glass substrate. The substrate is dipped successively into dilute solutions of a polyanion and a polycation. The homopolymers and copoymers of diallyldimethylammonium chloride (DDA), allylamine hydrochloride (AA), 2-[(methacryloyloxy)ethyl]trimethyl ammonium chloride (METAC) and vinylbenzyl tributyl phosphonium chloride(VTBPC) were used as the polycations. In this experiment, it was found that the resistance varied according to the chemical structure of the polycation. The resistance varied from 107 to 105 Ω, as the humidity was increased from 60 (relative humidity) to 95%RH, which is the range of RH values required for a dew sensor operating at high humidity.


humidity sensor layer-by-layer polyelectrolyte dew sensor 


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Copyright information

© The Polymer Society of Korea and Springer 2005

Authors and Affiliations

  • Chil-Won Lee
    • 1
  • Jong-Gyu Kim
    • 1
  • Myoung-Seon Gong
    • 1
  1. 1.Department of ChemistryDankook UniversityChungnamKorea

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