title: Enhancement of surface phonon modes in the Raman spectrum of ZnSe nanoparticles on adsorption of 4-mercaptopyridine.
abstract: By chemically etching a thin film of crystalline ZnSe with acid, we observe a strong Raman enhancement of the surface phonon modes of ZnSe on adsorption of a molecule (4-mercaptopyridine). The surface is composed of oblate hemi-ellipsoids, which has a large surface-to-bulk ratio. The assignment of the observed modes (at 248 and 492 cm(-1)) to a fundamental and first overtone of the surface optical mode is consistent with observations from high-resolution electron energy loss spectroscopy as well as calculations.
authors.affiliation: Department of Chemistry, The City College of New York, New York, New York 10031, USA.
authors.forename: Syed K
authors.initials: SK
authors.lastname: Islam
authors.affiliation: Department of Chemistry, The City College of New York, New York, New York 10031, USA.
authors.forename: John R
authors.initials: JR
authors.lastname: Lombardi