6533b820fe1ef96bd1279b15
RESEARCH PRODUCT
Number of observable features in the acoustic-Raman spectra of nanocrystals
Nicolas CombeNicolas CombeSaviot LucienAdnen MlayahAdnen Mlayahsubject
Materials scienceFOS: Physical sciences02 engineering and technology01 natural sciencesMolecular physicsSpectral linesymbols.namesakeCondensed Matter::Materials ScienceOptics0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Limit (mathematics)010306 general physicsRange (particle radiation)Condensed Matter - Mesoscale and Nanoscale Physicsbusiness.industryObservable[ PHYS.COND.CM-GEN ] Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]021001 nanoscience & nanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsNanocrystal[PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other]symbols0210 nano-technologybusinessRaman spectroscopydescription
Low-frequency Raman scattering spectra are presented for gold nanocrystals with diameters 3.5 and 13 nm. The frequencies of the Raman peaks but also their number are shown to vary with the nanocrystal size. These results are analyzed using both the continuous elastic medium approximation and an atomistic approach. We show that the number of atoms in the nanocrystal determines an upper limit of the number of observable Raman features. The frequency range in which the continuous elastic medium approximation is valid is defined by comparison with the calculations based on the atomistic approach.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-02-08 |