Vibrational energy relaxation in a molecular monolayer measured by picosecond sum spectroscopy

Alex Harris, N. J. Levinos

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Direct picosecond time-resolved measurements of vibrational energy relaxation for a molecular adsorbate at a bulk metal surface were made. Vibrational energy relaxation from ν=1 to ν==0 for C-H stretching modes of the terminal methyl group in a Cd stearate Langmuir-Blodgett monolayer on an evaporated silver film was measured using infrared-visible sum spectroscopy to dynamically probe vibrational level populations. Multicomponent decay processes with lifetimes of 3 ps to >1 ns indicate complex intramolecular vibrational energy transfer processes in these ordered monolayer films, which may be different in related polymer and molecular liquid systems.

Original languageEnglish
Pages (from-to)66-72
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume1056
DOIs
Publication statusPublished - Aug 15 1989

Fingerprint

Spectroscopy
Monolayers
Stearates
stearates
Energy Transfer
Adsorbates
Silver
Time measurement
Energy
Energy transfer
spectroscopy
Stretching
metal surfaces
Lifetime
Polymers
Infrared
Probe
Metals
energy transfer
silver

ASJC Scopus subject areas

  • Applied Mathematics
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Computer Science Applications

Cite this

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AB - Direct picosecond time-resolved measurements of vibrational energy relaxation for a molecular adsorbate at a bulk metal surface were made. Vibrational energy relaxation from ν=1 to ν==0 for C-H stretching modes of the terminal methyl group in a Cd stearate Langmuir-Blodgett monolayer on an evaporated silver film was measured using infrared-visible sum spectroscopy to dynamically probe vibrational level populations. Multicomponent decay processes with lifetimes of 3 ps to >1 ns indicate complex intramolecular vibrational energy transfer processes in these ordered monolayer films, which may be different in related polymer and molecular liquid systems.

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