Photo-control of adhesion properties by detachment of the outermost layer in layer-by-layer assembled multilayer films of Preyssler-type polyozometalate and polyethyleneimine

Yasutaka Nagaoka, Seimei Shiratori, Yasuaki Einaga

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The ability to generate small-scale structures and assemble functional substances in the fields of micro electronics and optoelectronics continues to support advances in information technology. Here we present a novel type of "layer-by-layer" assembled films, whose surface properties can be controlled by UV irradiation in aqueous solution. We have designed a photochromic multilayer film of Preyssler-type polyoxometalate, (NaP5W30) and polyethyleneimine (PEI) by using the layer-by-layer method. We found that the outermost PEI layer could be detached by UV irradiation in aqueous solution, and that this process could then cause inversion of the zeta potential. Furthermore, we achieved reversible-control of the surface properties first by UV irradiation, which induced the detachment of the outermost PEI layer, and by subsequent dipping into a PEI solution, which attached a new PEI layer. Finally, we successfully prepared photopatterned films with highly site-selective adsorption abilities by image-wise UV exposure.

Original languageEnglish
Pages (from-to)4004-4010
Number of pages7
JournalChemistry of Materials
Volume20
Issue number12
DOIs
Publication statusPublished - 2008 Jun 24

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Polyethyleneimine
Multilayer films
Adhesion
Irradiation
Surface properties
Zeta potential
Microelectronics
Optoelectronic devices
Information technology
Adsorption

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

Cite this

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abstract = "The ability to generate small-scale structures and assemble functional substances in the fields of micro electronics and optoelectronics continues to support advances in information technology. Here we present a novel type of {"}layer-by-layer{"} assembled films, whose surface properties can be controlled by UV irradiation in aqueous solution. We have designed a photochromic multilayer film of Preyssler-type polyoxometalate, (NaP5W30) and polyethyleneimine (PEI) by using the layer-by-layer method. We found that the outermost PEI layer could be detached by UV irradiation in aqueous solution, and that this process could then cause inversion of the zeta potential. Furthermore, we achieved reversible-control of the surface properties first by UV irradiation, which induced the detachment of the outermost PEI layer, and by subsequent dipping into a PEI solution, which attached a new PEI layer. Finally, we successfully prepared photopatterned films with highly site-selective adsorption abilities by image-wise UV exposure.",
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AU - Shiratori, Seimei

AU - Einaga, Yasuaki

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