Spectroscopic determination of phonon lifetimes in rhenium-doped MoS 2 nanoparticles

Qi C. Sun, Dipanjan Mazumdar, Lena Yadgarov, Rita Rosentsveig, Reshef Tenne, Janice L. Musfeldt

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

We investigated the infrared vibrational properties of pristine and Re-substituted MoS2 nanoparticles and analyzed the extracted phonon lifetimes in terms of multiple scattering events. Our measurements reveal both size- and doping-dependent changes that we attribute to grain boundary scattering and charge and mass effects, respectively. By contrast, Born charge is affected only by size. These findings illustrate the utility of reaching beyond traditional bulk semiconductors and quantum dots to explore how doping and confinement impact carrier-phonon interactions in low-dimensional semiconducting nanomaterials.

Original languageEnglish
Pages (from-to)2803-2808
Number of pages6
JournalNano Letters
Volume13
Issue number6
DOIs
StatePublished - 12 Jun 2013
Externally publishedYes

Keywords

  • Phonon lifetime
  • chalcogenides
  • infrared spectroscopy
  • layered materials
  • nanoparticles

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