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

Research output: Contribution to journalArticlepeer-review

13 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 I as /I s ratio). In this study, we apply this approach and an equation relating the temperature, Raman frequency, and I as /I s 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

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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