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.
|ホスト出版物のタイトル||Proceedings of 2005 International Symposium on Electrical Insulating Materials, ISEIM 2005|
|出版ステータス||Published - 2005|
|イベント||2005 International Symposium on Electrical Insulating Materials, ISEIM 2005 - Kitakyushu|
継続期間: 2005 6月 5 → 2005 6月 9
|Other||2005 International Symposium on Electrical Insulating Materials, ISEIM 2005|
|Period||05/6/5 → 05/6/9|
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