Enhanced Raman Spectroscopy of Nanostructured Semiconductor Phonon Modes

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NCJ Number
304224
Journal
Journal of Physical Chemistry Letters Volume: 2 Issue: 6 Dated: March 2011
Author(s)
STEPHEN MA
RICHARD LIVINGSTONE
BING ZHAO
JOHN R. LOMBARDI
Date Published
2011
Length
4 pages
Annotation

This article reports on a project that observed enhanced Raman intensity of the phonon modes of nanosized semiconductor particles induced by adsorption of various molecules.

Abstract

This is in contradistinction to surface-enhanced Raman spectroscopy (SERS), in which the Raman lines of an adsorbate are enhanced by proximity to either a metal or semiconductor nanoparticle. We report on enhancements of phonon modes in nanostructured and quantum dots of TiO2, as well as quantum dots of ZnO and PbS. Because plasmon resonances in semiconductor systems are far in the IR, it is likely that some combination of interband and charge-transfer resonances is responsible for the observed enhancement. (publisher abstract modified)

 

Grant Number(s)
2006-DN-BX-K034
Agencies
NIJ-Sponsored
Publication Type
Research (Applied/Empirical)
Award
Development of Advanced Raman Spectroscopy Methods and Databases for the Evaluation of Trace Evidence and the Examination of Questioned Documents
Date Published: January 1, 2011

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