Crystallographic coherent lengths of J-aggregates and their absorption spectra

Noritaka Kato, Ichiro Hirosawa, Masugu Sato, Tomoyuki Koganezawa, Kazuya Yuasa

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The Langmuir (L) and Langmuir-Blodgett (LB) films of the J-aggregates formed by amphiphilic merocyanine dye (MD) differ their absorption bands (J-bands), and the J-band in the LB film is located in shorter wavelength than that in the L film. From the grazing incidence X-ray diffraction patterns, the lattice structures and the crystallographic coherent lengths of the MD J-aggregates in the L and LB films were evaluated. Besides a 7% shrinkage of the 2-dimensional lattice in the LB film, more than two-order of magnitude shorter coherent lengths were observed in the LB film, suggesting that the difference of the J-band wavelength was attributed to the size effect of the J-aggregate crystal.

    Original languageEnglish
    Pages (from-to)275-280
    Number of pages6
    JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
    Volume321
    Issue number1-3
    DOIs
    Publication statusPublished - 2008 May 15

    Fingerprint

    Langmuir Blodgett films
    Langmuir-Blodgett films
    Absorption spectra
    absorption spectra
    Dyes
    dyes
    Wavelength
    grazing incidence
    shrinkage
    wavelengths
    Diffraction patterns
    diffraction patterns
    X ray diffraction
    Crystals
    crystals
    x rays
    merocyanine dye

    Keywords

    • J-aggregate
    • Merocyanine
    • Size effect
    • X-ray diffraction

    ASJC Scopus subject areas

    • Colloid and Surface Chemistry
    • Physical and Theoretical Chemistry

    Cite this

    Crystallographic coherent lengths of J-aggregates and their absorption spectra. / Kato, Noritaka; Hirosawa, Ichiro; Sato, Masugu; Koganezawa, Tomoyuki; Yuasa, Kazuya.

    In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 321, No. 1-3, 15.05.2008, p. 275-280.

    Research output: Contribution to journalArticle

    Kato, Noritaka ; Hirosawa, Ichiro ; Sato, Masugu ; Koganezawa, Tomoyuki ; Yuasa, Kazuya. / Crystallographic coherent lengths of J-aggregates and their absorption spectra. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2008 ; Vol. 321, No. 1-3. pp. 275-280.
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    AU - Hirosawa, Ichiro

    AU - Sato, Masugu

    AU - Koganezawa, Tomoyuki

    AU - Yuasa, Kazuya

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