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

doi:10.1021/nl401066e

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 journal › Article › peer-review

44 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 language	English
Pages (from-to)	2803-2808
Number of pages	6
Journal	Nano Letters
Volume	13
Issue number	6
DOIs	https://doi.org/10.1021/nl401066e
State	Published - 12 Jun 2013
Externally published	Yes

Keywords

Phonon lifetime
chalcogenides
infrared spectroscopy
layered materials
nanoparticles

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10.1021/nl401066e

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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.",

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AU - Mazumdar, Dipanjan

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AU - Tenne, Reshef

AU - Musfeldt, Janice L.

PY - 2013/6/12

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AB - 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.

KW - Phonon lifetime

KW - chalcogenides

KW - infrared spectroscopy

KW - layered materials

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

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Keywords

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