Molecular adsorbates under high pressure: A study using surface-enhanced Raman scattering spectroscopy

Y. Fu, J. M. Christensen, D. D. Dlott

Research output: Contribution to journalConference articlepeer-review

Abstract

Molecules adsorbed on metal surfaces were studied in a diamond anvil cell with Ar pressure-transmission medium up to several GPa pressure using Raman spectroscopy. The problem with studying molecules on surfaces is the small number density. This problem was overcome using photonic substrates to amplify the Raman intensity by factors of 106 in the case of self-assembled monolayers on Ag-coated nanoarrays, where the probed region contained ∼109 molecules, and >109 in the case of the dye Rhodamine 6G on Ag nanoaggregates, where <106 molecules were probed. Pressure effects on the adsorbate vibrations and on the underlying nanostructures are discussed.

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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