Nanoscale two-photon induced polymerization of diacetylene Langmuir-Blodgett film by near-field photoirradiation

Akira Sakamoto, Kazuhiko Mori, Kohei Imura, Hiromi Okamoto

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have succeeded in nanoscale polymerization of Langmuir-Blodgett (LB) films of cadmium 10,12-pentacosadiynoate (CdPA) by near-field two-photon excitation with femtosecond pulses. The LB films of CdPA were excited locally through an aperture of a near-field optical fiber probe by femtosecond-pulsed near-infrared radiation. The formation of polydiacetylene (PDA) films has been confirmed by two-photon induced and ordinary (linear) luminescence and Raman measurements by using a scanning near-field optical microscope. The polymerization of CdPA to PDA was induced by the femtosecond-pulsed near-infrared radiation but not by continuous wave radiation. This result confirms that the polymerization was not induced by heat arising from the near-field irradiation. The number of photons involved in the polymerization reaction was estimated to be 2 from the dependence of photoluminescence intensities of PDA on the power of incident light for polymerization.

Original languageEnglish
Pages (from-to)6190-6194
Number of pages5
JournalJournal of Physical Chemistry C
Volume115
Issue number14
DOIs
Publication statusPublished - 2011 Apr 14
Externally publishedYes

Fingerprint

Langmuir Blodgett films
Langmuir-Blodgett films
near fields
Photons
polymerization
Polymerization
Cadmium
near infrared radiation
cadmium
photons
Infrared radiation
Ultrashort pulses
optical microscopes
continuous radiation
Luminescence
Optical fibers
electromagnetic radiation
Photoluminescence
Microscopes
optical fibers

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Nanoscale two-photon induced polymerization of diacetylene Langmuir-Blodgett film by near-field photoirradiation. / Sakamoto, Akira; Mori, Kazuhiko; Imura, Kohei; Okamoto, Hiromi.

In: Journal of Physical Chemistry C, Vol. 115, No. 14, 14.04.2011, p. 6190-6194.

Research output: Contribution to journalArticle

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