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Laser Photothermal Melting and Fragmentation of Gold Nanorods: Energy and Laser Pulse-Width Dependence
Abstract
We studied the shape transformation (by use of TEM and optical absorption spectroscopy) of gold nanorods in micellar solution by exposure to laser pulses of different pulse width (100 fs and 7 ns) and different energies (μJ to mJ) at 800 nm, where the longitudinal surface plasmon oscillation of the nanorods absorb. At moderate energies, the femtosecond irradiation melts the nanorods to near spherical particles of comparable volumes while the nanosecond pulses fragment them to smaller near-spherical particles. At high energies, fragmentation is also observed for the femtosecond irradiation. A mechanism involving the rate of energy deposition as compared to the rate of electron−phonon and phonon−phonon relaxation processes is proposed to determine the final fate of the laser-exposed nanorods, i.e., melting or fragmentation.
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Cites
Perspectives on the Physical Chemistry of Semiconductor Nanocrystals
Alivisatos, A. P. (1996) · The Journal of Physical Chemistry · doi:10.1021/jp9535506 · Cited by 3,595
Cited by
Chemistry and Properties of Nanocrystals of Different Shapes
Burda, C., Chen, X., Narayanan, R., & El-Sayed, M. A. (2005) · Chemical Reviews · doi:10.1021/cr030063a · Cited by 7,230
Self-citationSome Interesting Properties of Metals Confined in Time and Nanometer Space of Different Shapes
El-Sayed, M. A. (2001) · Accounts of Chemical Research · doi:10.1021/ar960016n · Cited by 2,773
Self-citationTransmission Electron Microscopy of Shape-Controlled Nanocrystals and Their Assemblies
Wang, Z. L. (2000) · The Journal of Physical Chemistry B · doi:10.1021/jp993593c · Cited by 2,137
Photophysical, Photochemical and Photocatalytic Aspects of Metal Nanoparticles
Kamat, P. V. (2002) · The Journal of Physical Chemistry B · doi:10.1021/jp0209289 · Cited by 1,924
Gold Nanorods: From Synthesis and Properties to Biological and Biomedical Applications
Huang, X., Neretina, S., & El‐Sayed, M. A. (2009) · Advanced Materials · doi:10.1002/adma.200802789 · Cited by 1,921
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Metadata
- Authors
- Link, S., Burda, C., Mohamed, M. B., Nikoobakht, B., & El-Sayed, M. A.
- Venue
- The Journal of Physical Chemistry A
- Publisher
- American Chemical Society (ACS)
- Published
- 1999-03-01
- Volume
- 103
- Issue
- 9
- Pages
- 1165-1170
- ISSN
- 1089-5639 (ISSN-L)
- 1520-5215
- OpenAlex
- W2035097645
- Cited by
- 502
- References
- 1
- FWCI
- 11.27
- Type
- journal article
- Language
- en
- Open access
- closed
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- Link, S., Burda, C., Mohamed, M. B., Nikoobakht, B., & El-Sayed, M. A. (1999). Laser Photothermal Melting and Fragmentation of Gold Nanorods: Energy and Laser Pulse-Width Dependence. The Journal of Physical Chemistry A. https://doi.org/10.1021/jp983141k
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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