Ultrafast laser studies of the photothermal properties of gold nanocages

Min Hu; Hristina Petrova; Jingyi Chen; Joseph M. McLellan; Andrew R. Siekkinen; Manuel Marquez; Xingde Li; Younan Xia; Gregory V. Hartland

doi:10.1021/jp0571628

Ultrafast laser studies of the photothermal properties of gold nanocages

Min Hu, Hristina Petrova, Jingyi Chen, Joseph M. McLellan, Andrew R. Siekkinen, Manuel Marquez, Xingde Li, Younan Xia, Gregory V. Hartland

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

92 Scopus citations

Abstract

Au nanocages were synthesized via a galvanic replacement reaction. The extinction peak of these hollow structured particles is shifted into the near-IR compared with the Ag nanocube templates. Energy transfer ' from the Au nanocages into the surrounding environment (water) as well as the coherently excited vibrational modes of the nanocages were studied by femtosecond pump-probe spectroscopy. The time scale for energy relaxation was found to increase with the size of the particles, with the relaxation time being independent of the laser intensity. The time scales for relaxation are comparable to those for solid spherical gold particles and are consistent with energy relaxation being controlled by heat dissipation in the solvent. The period of the coherently excited vibrational mode is proportional to the dimensions of the nanocages. Intensity-dependent measurements show that in solution the nanocages maintain their integrity up to lattice temperatures of 1100 ± 100 K.

Original language	English (US)
Pages (from-to)	1520-1524
Number of pages	5
Journal	Journal of Physical Chemistry B
Volume	110
Issue number	4
DOIs	https://doi.org/10.1021/jp0571628
State	Published - Feb 2 2006
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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10.1021/jp0571628

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title = "Ultrafast laser studies of the photothermal properties of gold nanocages",

abstract = "Au nanocages were synthesized via a galvanic replacement reaction. The extinction peak of these hollow structured particles is shifted into the near-IR compared with the Ag nanocube templates. Energy transfer ' from the Au nanocages into the surrounding environment (water) as well as the coherently excited vibrational modes of the nanocages were studied by femtosecond pump-probe spectroscopy. The time scale for energy relaxation was found to increase with the size of the particles, with the relaxation time being independent of the laser intensity. The time scales for relaxation are comparable to those for solid spherical gold particles and are consistent with energy relaxation being controlled by heat dissipation in the solvent. The period of the coherently excited vibrational mode is proportional to the dimensions of the nanocages. Intensity-dependent measurements show that in solution the nanocages maintain their integrity up to lattice temperatures of 1100 ± 100 K.",

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T1 - Ultrafast laser studies of the photothermal properties of gold nanocages

AU - Hu, Min

AU - Petrova, Hristina

AU - Chen, Jingyi

AU - McLellan, Joseph M.

AU - Siekkinen, Andrew R.

AU - Marquez, Manuel

AU - Li, Xingde

AU - Xia, Younan

AU - Hartland, Gregory V.

PY - 2006/2/2

Y1 - 2006/2/2

N2 - Au nanocages were synthesized via a galvanic replacement reaction. The extinction peak of these hollow structured particles is shifted into the near-IR compared with the Ag nanocube templates. Energy transfer ' from the Au nanocages into the surrounding environment (water) as well as the coherently excited vibrational modes of the nanocages were studied by femtosecond pump-probe spectroscopy. The time scale for energy relaxation was found to increase with the size of the particles, with the relaxation time being independent of the laser intensity. The time scales for relaxation are comparable to those for solid spherical gold particles and are consistent with energy relaxation being controlled by heat dissipation in the solvent. The period of the coherently excited vibrational mode is proportional to the dimensions of the nanocages. Intensity-dependent measurements show that in solution the nanocages maintain their integrity up to lattice temperatures of 1100 ± 100 K.

AB - Au nanocages were synthesized via a galvanic replacement reaction. The extinction peak of these hollow structured particles is shifted into the near-IR compared with the Ag nanocube templates. Energy transfer ' from the Au nanocages into the surrounding environment (water) as well as the coherently excited vibrational modes of the nanocages were studied by femtosecond pump-probe spectroscopy. The time scale for energy relaxation was found to increase with the size of the particles, with the relaxation time being independent of the laser intensity. The time scales for relaxation are comparable to those for solid spherical gold particles and are consistent with energy relaxation being controlled by heat dissipation in the solvent. The period of the coherently excited vibrational mode is proportional to the dimensions of the nanocages. Intensity-dependent measurements show that in solution the nanocages maintain their integrity up to lattice temperatures of 1100 ± 100 K.

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Ultrafast laser studies of the photothermal properties of gold nanocages

Abstract

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