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 D Schaller

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)5797-5801
Number of pages5
JournalNano Letters
Volume12
Issue number11
DOIs
Publication statusPublished - Nov 14 2012

Fingerprint

Nanocrystals
Thermal conductivity
nanocrystals
thermal conductivity
engineering
Semiconductor materials
matrices
Transport properties
manipulators
Energy gap
transport properties
signatures
radii
Hot Temperature

Keywords

  • phonon
  • Quantum dot
  • semiconductor
  • spectroscopy
  • thermal transport

ASJC Scopus subject areas

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

Cite this

Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals. / Hannah, Daniel C.; Ithurria, Sandrine; Krylova, Galyna; Talapin, Dmitri V.; Schatz, George C; Schaller, Richard D.

In: Nano Letters, Vol. 12, No. 11, 14.11.2012, p. 5797-5801.

Research output: Contribution to journalArticle

Hannah, Daniel C. ; Ithurria, Sandrine ; Krylova, Galyna ; Talapin, Dmitri V. ; Schatz, George C ; Schaller, Richard D. / Particle-level engineering of thermal conductivity in matrix-embedded semiconductor nanocrystals. In: Nano Letters. 2012 ; Vol. 12, No. 11. pp. 5797-5801.
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