Preparation and NO2 gas properties of layer-by-layer alternate films of copper phthalocyanine derivatives

K. Shinbo, N. Watanabe, K. Kato, F. Kaneko, R. C. Advincula

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Copper phthalocyanine (CuPc) alternate layer-by-layer (LbL) films were fabricated and the electrical properties due to NO2 gas adsorption were investigated. Water-soluble CuPc, that is, cationic Alcian blue, pyridine variant (AB) and anionic copper phthalocyanine-3,4′,4″,4‴- tetrasulfonic acid, tetrasodium salt (CuPcTs) were used for the fabrication of the alternate LbL films. UV-visible absorption and ellipsometry measurements were carried out and successive depositions of the CuPc alternate LbL films were confirmed. The average thicknesses of the AB and CuPcTs monolayers were estimated to be about 0.7 and 0.4 nm, respectively. The fundamental electrical properties were investigated for the CuPc alternate LbL films with Au gap electrodes and the properties in the direction parallel to the surfaces of the LbL films were investigated. The response to NO2 gas was also measured and the large increase of conduction currents due to NO2 gas adsorption was observed. The magnitude of the conduction current after 30 min exposure to 100 ppm NO2 gas was 103-104 times larger than that in N2 gas. Fast response was observed for the thin LbL films.

Original languageEnglish
Title of host publicationProceedings of 2005 International Symposium on Electrical Insulating Materials, ISEIM 2005
Pages218-221
Number of pages4
Volume1
Publication statusPublished - 2005
Externally publishedYes
Event2005 International Symposium on Electrical Insulating Materials, ISEIM 2005 - Kitakyushu
Duration: 2005 Jun 52005 Jun 9

Other

Other2005 International Symposium on Electrical Insulating Materials, ISEIM 2005
CityKitakyushu
Period05/6/505/6/9

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

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