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

Research output: Contribution to journalArticle

10 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 languageEnglish
Pages (from-to)2311-2314
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number4 B
Publication statusPublished - 2004 Apr
Externally publishedYes

Fingerprint

Electric properties
Dyes
dyes
electrical properties
Copper
copper
Gases
Gas adsorption
gases
conduction
Ellipsometry
Pyridine
Monolayers
Salts
Electrodes
adsorption
Acids
ellipsometry
Water
pyridines

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; Shinbo, Kazunari; Kaneko, Futao; Locklin, Jason; Baba, Akira; Advincula, Rigoberto C.

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 journalArticle

Kato, K, Watanabe, N, Katagiri, S, Shinbo, K, Kaneko, F, Locklin, J, Baba, A & Advincula, RC 2004, 'Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes', Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, vol. 43, no. 4 B, pp. 2311-2314.
Kato, Keizo ; Watanabe, Naoki ; Katagiri, Shigenobu ; Shinbo, Kazunari ; Kaneko, Futao ; Locklin, Jason ; Baba, Akira ; Advincula, Rigoberto C. / Electrical properties and gas response in alternate layer-by-layer films of copper phthalocyanine dyes. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2004 ; Vol. 43, No. 4 B. pp. 2311-2314.
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