Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes

Keizo Kato; Naoki Watanabe; Shigenobu Katagiri; Kazunari Shinbo; Futao Kaneko; Jason Locklin; Akira Baba; Rigoberto C. Advincula

Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes

Keizo Kato^*, Naoki Watanabe, Shigenobu Katagiri, Kazunari Shinbo, Futao Kaneko, Jason Locklin, Akira Baba, Rigoberto C. Advincula

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Alternate layer-by-layer (LbL) films were fabricated using two kinds of copper phthalocyanine (CuPc) dyes and the electrical properties due to NO ₂ gas adsorption were investigated. Water-soluble CuPc dyes, 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 alternate LbL films. Successive depositions of the CuPc alternate LbL films were confirmed using UV-visible absorption and ellipsometry measurements. The average thicknesses of the AB and CuPcTs monolayers were estimated to be 0.7 nm and 0.4 nm, respectively. The fundamental electrical properties were examined 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 measured. The conduction currents were considered to be dominated by hopping conduction. The response to NO₂ gas was also measured and the large increase in conduction currents due to NO ₂ gas adsorption was observed. The magnitude of the conduction current after 30min exposure to 100 ppm NO₂ gas was 10 ⁴-10⁴ times larger than that in N₂ gas.

Original language	English
Pages (from-to)	2311-2314
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume	43
Issue number	4 B
Publication status	Published - 2004 Apr
Externally published	Yes

Keywords

Alternate layer-by-layer film
Copper phthalocyanine
Electrical property
Gas response

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Cite this

Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes. / Kato, Keizo; Watanabe, Naoki; Katagiri, Shigenobu et al.
In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 43, No. 4 B, 04.2004, p. 2311-2314.

Research output: Contribution to journal › Article › peer-review

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title = "Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes",

abstract = "Alternate layer-by-layer (LbL) films were fabricated using two kinds of copper phthalocyanine (CuPc) dyes and the electrical properties due to NO 2 gas adsorption were investigated. Water-soluble CuPc dyes, 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 alternate LbL films. Successive depositions of the CuPc alternate LbL films were confirmed using UV-visible absorption and ellipsometry measurements. The average thicknesses of the AB and CuPcTs monolayers were estimated to be 0.7 nm and 0.4 nm, respectively. The fundamental electrical properties were examined 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 measured. The conduction currents were considered to be dominated by hopping conduction. The response to NO2 gas was also measured and the large increase in conduction currents due to NO 2 gas adsorption was observed. The magnitude of the conduction current after 30min exposure to 100 ppm NO2 gas was 10 4-104 times larger than that in N2 gas.",

keywords = "Alternate layer-by-layer film, Copper phthalocyanine, Electrical property, Gas response",

author = "Keizo Kato and Naoki Watanabe and Shigenobu Katagiri and Kazunari Shinbo and Futao Kaneko and Jason Locklin and Akira Baba and Advincula, {Rigoberto C.}",

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T1 - Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes

AU - Kato, Keizo

AU - Watanabe, Naoki

AU - Katagiri, Shigenobu

AU - Shinbo, Kazunari

AU - Kaneko, Futao

AU - Locklin, Jason

AU - Baba, Akira

AU - Advincula, Rigoberto C.

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N2 - Alternate layer-by-layer (LbL) films were fabricated using two kinds of copper phthalocyanine (CuPc) dyes and the electrical properties due to NO 2 gas adsorption were investigated. Water-soluble CuPc dyes, 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 alternate LbL films. Successive depositions of the CuPc alternate LbL films were confirmed using UV-visible absorption and ellipsometry measurements. The average thicknesses of the AB and CuPcTs monolayers were estimated to be 0.7 nm and 0.4 nm, respectively. The fundamental electrical properties were examined 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 measured. The conduction currents were considered to be dominated by hopping conduction. The response to NO2 gas was also measured and the large increase in conduction currents due to NO 2 gas adsorption was observed. The magnitude of the conduction current after 30min exposure to 100 ppm NO2 gas was 10 4-104 times larger than that in N2 gas.

AB - Alternate layer-by-layer (LbL) films were fabricated using two kinds of copper phthalocyanine (CuPc) dyes and the electrical properties due to NO 2 gas adsorption were investigated. Water-soluble CuPc dyes, 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 alternate LbL films. Successive depositions of the CuPc alternate LbL films were confirmed using UV-visible absorption and ellipsometry measurements. The average thicknesses of the AB and CuPcTs monolayers were estimated to be 0.7 nm and 0.4 nm, respectively. The fundamental electrical properties were examined 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 measured. The conduction currents were considered to be dominated by hopping conduction. The response to NO2 gas was also measured and the large increase in conduction currents due to NO 2 gas adsorption was observed. The magnitude of the conduction current after 30min exposure to 100 ppm NO2 gas was 10 4-104 times larger than that in N2 gas.

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KW - Copper phthalocyanine

KW - Electrical property

KW - Gas response

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Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes

Abstract

Keywords

ASJC Scopus subject areas

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