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- Kwon, Oh Hoon
- Ultrafast Laser Spectroscopy and Nano-microscopy Lab.
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Mesoscopic linear alignment and thermal-relaxation dynamics of aggregated gold nanorods
- Author(s)
- Kwon, Oh Hoon, Lee, S, Jang, DJ
- Issued Date
- 2005-07
- Citation
- EUROPEAN PHYSICAL JOURNAL D, v.34, no.1-3, pp.243 - 246
- Abstract
- Aqueous gold nanorod colloids aggregated by Cl- are further assembled into linearly aligned structures of linear bundles during evaporation on TEM grids. Gold nanorods in bundles are also oriented in nearly head-to-tail shapes in the microscopic scale. Induced dipolar long-range interactions in the mesoscopic scale are suggested to drive gold nanorods to aggregate. Although surface-plasmon absorption at transverse resonances decreases, that at longitudinal resonances increases with aggregation. The photon-thermalized heat of the dispersed and the aggregated gold nanorods dissipates to immediately surrounding media on the time scales of 100 and 800 ps, respectively.
- Publisher
- SPRINGER
- ISSN
- 1434-6060
- Keyword
- OPTICAL-PROPERTIES, SILVER NANOPARTICLES, METAL NANOPARTICLES, DNA, ARRAYS, AU
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