Fabrication and electrochromic properties of layer-by-layer self-assembled ultrathin films containing water-soluble phthalocyanine

Kazunari Shinbo, Keizo Kato, Futao Kaneko, Ken Onishi, Rigoberto C. Advincula, Xiaowu Fan, Rigoberto C. Advincula

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Alternate ultrathin films of water-soluble copper (II) phthalocyanine-3,4′ ,4″ ,4‴-tetrasulfonic acid (CuPcTs) and poly(diallyldimethylammonium chloride) (PDADMAC) were fabricated using the electrostatic layer-by-layer self-assembly technique. Linear depositions of the bilayers were observed from the UV-vis absorption spectra and ellipsometry. The average thickness of the CuPcTs monolayer obtained from ellipsometry was about 1.2nm and CuPcTs molecules were estimated to be tilted to the film surface. The cyclic votammogram (C-V) of the fabricated films in aqueous solution containing 0.1 M KCl suggested the oxidation and reduction of the CuPcTs at around +0.9 V and 0.05 V respectively. UV-vis absorption spectra were observed for the films at applied voltages of 0.8Vand 0V in the KCl aqueous solution and reversible absorption changes were observed.

Original languageEnglish
JournalMolecular Crystals and Liquid Crystals
Volume407
DOIs
Publication statusPublished - 2003
Externally publishedYes

Fingerprint

Ultrathin films
Ellipsometry
Fabrication
fabrication
Water
Absorption spectra
water
ellipsometry
aqueous solutions
absorption spectra
Self assembly
Copper
Electrostatics
Monolayers
self assembly
Oxidation
Molecules
Acids
chlorides
Electric potential

Keywords

  • Cyclic voltammetry
  • Electrochromis, layer-by-layer self-assembly
  • Phthalocyanine
  • Poly(diallyldimethylammonium chloride)

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Fabrication and electrochromic properties of layer-by-layer self-assembled ultrathin films containing water-soluble phthalocyanine. / Shinbo, Kazunari; Kato, Keizo; Kaneko, Futao; Onishi, Ken; Advincula, Rigoberto C.; Fan, Xiaowu; Advincula, Rigoberto C.

In: Molecular Crystals and Liquid Crystals, Vol. 407, 2003.

Research output: Contribution to journalArticle

Shinbo, Kazunari ; Kato, Keizo ; Kaneko, Futao ; Onishi, Ken ; Advincula, Rigoberto C. ; Fan, Xiaowu ; Advincula, Rigoberto C. / Fabrication and electrochromic properties of layer-by-layer self-assembled ultrathin films containing water-soluble phthalocyanine. In: Molecular Crystals and Liquid Crystals. 2003 ; Vol. 407.
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AU - Shinbo, Kazunari

AU - Kato, Keizo

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AU - Onishi, Ken

AU - Advincula, Rigoberto C.

AU - Fan, Xiaowu

AU - Advincula, Rigoberto C.

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N2 - Alternate ultrathin films of water-soluble copper (II) phthalocyanine-3,4′ ,4″ ,4‴-tetrasulfonic acid (CuPcTs) and poly(diallyldimethylammonium chloride) (PDADMAC) were fabricated using the electrostatic layer-by-layer self-assembly technique. Linear depositions of the bilayers were observed from the UV-vis absorption spectra and ellipsometry. The average thickness of the CuPcTs monolayer obtained from ellipsometry was about 1.2nm and CuPcTs molecules were estimated to be tilted to the film surface. The cyclic votammogram (C-V) of the fabricated films in aqueous solution containing 0.1 M KCl suggested the oxidation and reduction of the CuPcTs at around +0.9 V and 0.05 V respectively. UV-vis absorption spectra were observed for the films at applied voltages of 0.8Vand 0V in the KCl aqueous solution and reversible absorption changes were observed.

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