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Picosecond optical nonlinearity in monolayer-protected gold, silver, and gold-silver alloy nanoclusters
Abstract
Monolayer-protected Au, Ag, and Au:Ag alloy nanoclusters have been synthesized using octanethiol and octadecanethiol as capping agents. The particle-size distribution is narrow with an average core size of 3--4 nm. Optical nonlinearity induced by 35 ps pulses at 532 nm has been investigated in these samples using the Z-scan technique. It is found that in general, they behave either as saturable absorbers or reverse saturable absorbers depending on the intensity of excitation. Au and Ag clusters show nearly the same efficiency for optical limiting, but the alloy clusters are found to be less efficient in limiting and are less photostable. The observed effects are explained in terms of the electron dynamics of the excited-state species.
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Cites
Beiträge zur Optik trüber Medien, speziell kolloidaler Metallösungen
Mie, G. (1908) · Annalen der Physik · doi:10.1002/andp.19083300302 · Cited by 11,537
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
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
Pong, B.-K., Elim, H. I., Chong, J.-X., Ji, W., Trout, B. L., & Lee, J.-Y. (2007) · The Journal of Physical Chemistry C · doi:10.1021/jp068666o · Cited by 310
Krishna, K. S., Sandeep, C. S. S., Philip, R., & Eswaramoorthy, M. (2010) · ACS Nano · doi:10.1021/nn100320s · Cited by 133
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Metadata
- Authors
- Philip, R., Kumar, G. R., Sandhyarani, N., & Pradeep, T.
- Venue
- Physical Review B
- Publisher
- American Physical Society (APS)
- Published
- 2000-11-15
- Volume
- 62
- Issue
- 19
- Pages
- 13160-13166
- ISSN
- 0163-1829 (ISSN-L)
- 1095-3795
- OpenAlex
- W1989064678
- Cited by
- 304
- References
- 2
- FWCI
- 5.39
- Type
- journal article
- Language
- en
- Open access
- closed
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- Philip, R., Kumar, G. R., Sandhyarani, N., & Pradeep, T. (2000). Picosecond optical nonlinearity in monolayer-protected gold, silver, and gold-silver alloy nanoclusters. Physical Review B. https://doi.org/10.1103/physrevb.62.13160
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