Estimated phase transition and melting temperature of APTES self-assembled monolayer using surface-enhanced anti-stokes and stokes Raman scattering

Yingying Sun, Masahiro Yanagisawa, Masahiro Kunimoto, Masatoshi Nakamura, Takayuki Homma

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    10 Citations (Scopus)

    Abstract

    A structure's temperature can be determined from the Raman spectrum using the frequency and the ratio of the intensities of the anti-Stokes and Stokes signals (the Ias/Is ratio). In this study, we apply this approach and an equation relating the temperature, Raman frequency, and Ias/Is ratio to in-situ estimation of the phase change point of a (3-aminopropyl)triethoxysilane self-assembled monolayer (APTES SAM). Ag nanoparticles were deposited on APTES to enhance the Raman signals. A time-resolved measurement mode was used to monitor the variation in the Raman spectra in situ. Moreover, the structural change in APTES SAM (from ordered to disordered structure) under heating was discussed in detail, and the phase change point (around 118 °C) was calculated.

    Original languageEnglish
    Pages (from-to)572-577
    Number of pages6
    JournalApplied Surface Science
    Volume363
    DOIs
    Publication statusPublished - 2016 Feb 15

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    Keywords

    • Anti-Stokes and Stokes Raman
    • APTES SAM
    • In situ time resolved measurement
    • Melting point
    • Phase transition
    • SERS

    ASJC Scopus subject areas

    • Surfaces, Coatings and Films

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