Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals

Daniel C. Hannah; Sandrine Ithurria; Galyna Krylova; Dmitri V. Talapin; George C Schatz; Richard Daniel Schaller

doi:10.1021/nl303109r

Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals

Daniel C. Hannah, Sandrine Ithurria, Galyna Krylova, Dmitri V. Talapin, George C Schatz, Richard Daniel Schaller^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Known manipulations of semiconductor thermal transport properties rely upon higher-order material organization. Here, using time-resolved optical signatures of phonon transport, we demonstrate a "bottom-up" means of controlling thermal outflow in matrix-embedded semiconductor nanocrystals. Growth of an electronically noninteracting ZnS shell on a CdSe core modifies thermalization times by an amount proportional to the overall particle radius. Using this approach, we obtain changes in effective thermal conductivity of up to 5× for a nearly constant energy gap.

Original language	English (US)
Pages (from-to)	5797-5801
Number of pages	5
Journal	Nano Letters
Volume	12
Issue number	11
DOIs	https://doi.org/10.1021/nl303109r
State	Published - Nov 14 2012

Keywords

Quantum dot
phonon
semiconductor
spectroscopy
thermal transport

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1021/nl303109r

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title = "Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals",

abstract = "Known manipulations of semiconductor thermal transport properties rely upon higher-order material organization. Here, using time-resolved optical signatures of phonon transport, we demonstrate a {"}bottom-up{"} means of controlling thermal outflow in matrix-embedded semiconductor nanocrystals. Growth of an electronically noninteracting ZnS shell on a CdSe core modifies thermalization times by an amount proportional to the overall particle radius. Using this approach, we obtain changes in effective thermal conductivity of up to 5× for a nearly constant energy gap.",

keywords = "Quantum dot, phonon, semiconductor, spectroscopy, thermal transport",

author = "Hannah, {Daniel C.} and Sandrine Ithurria and Galyna Krylova and Talapin, {Dmitri V.} and Schatz, {George C} and Schaller, {Richard Daniel}",

year = "2012",

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doi = "10.1021/nl303109r",

language = "English (US)",

volume = "12",

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journal = "Nano Letters",

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T1 - Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals

AU - Hannah, Daniel C.

AU - Ithurria, Sandrine

AU - Krylova, Galyna

AU - Talapin, Dmitri V.

AU - Schatz, George C

AU - Schaller, Richard Daniel

PY - 2012/11/14

Y1 - 2012/11/14

N2 - Known manipulations of semiconductor thermal transport properties rely upon higher-order material organization. Here, using time-resolved optical signatures of phonon transport, we demonstrate a "bottom-up" means of controlling thermal outflow in matrix-embedded semiconductor nanocrystals. Growth of an electronically noninteracting ZnS shell on a CdSe core modifies thermalization times by an amount proportional to the overall particle radius. Using this approach, we obtain changes in effective thermal conductivity of up to 5× for a nearly constant energy gap.

AB - Known manipulations of semiconductor thermal transport properties rely upon higher-order material organization. Here, using time-resolved optical signatures of phonon transport, we demonstrate a "bottom-up" means of controlling thermal outflow in matrix-embedded semiconductor nanocrystals. Growth of an electronically noninteracting ZnS shell on a CdSe core modifies thermalization times by an amount proportional to the overall particle radius. Using this approach, we obtain changes in effective thermal conductivity of up to 5× for a nearly constant energy gap.

KW - Quantum dot

KW - phonon

KW - semiconductor

KW - spectroscopy

KW - thermal transport

UR - http://www.scopus.com/inward/record.url?scp=84869191912&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84869191912&partnerID=8YFLogxK

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EP - 5801

JO - Nano Letters

JF - Nano Letters

IS - 11

ER -

Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals

Abstract

Keywords

ASJC Scopus subject areas

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