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Photothermal reshaping of prismatic Au nanoparticles in periodic monolayer arrays by femtosecond laser pulses
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10.1063/1.2132515
/content/aip/journal/jap/98/11/10.1063/1.2132515
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/11/10.1063/1.2132515
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Microabsorption spectra of a periodic monolayer array of prismatic gold nanoparticles after irradiation with 400 nm femtosecond laser at different intensities. The numbers in the plot correspond to different power densities of the examined region on the substrate within the laser profile calculated by assuming that the energy in the laser pulse has a Gaussian distribution. The arrow shows that the energy density goes from low to high as one moves from the edge to the center of the laser irradiation profile on the array. The diameter of the laser spot on the array is .

Image of FIG. 2.
FIG. 2.

The SEM images of the periodic monolayer prismatic gold nanoparticle arrays at exposed regions within the laser-pulse profile (i.e., at different laser power densities) (a) before and [(b)–(e)] after irradiation with 400 nm femtosecond laser. From the Gaussian laser energy distribution profile, the calculated laser densities are (b) 3.1, (c) 3.5, (d) 3.9, and (e) .

Image of FIG. 3.
FIG. 3.

(Color online) Microabsorption spectra of a periodic monolayer array of prismatic gold nanoparticles after irradiation with 800 nm femtosecond laser at different intensities. The numbers in the plot correspond to different power densities of the examined region on the substrate within the laser profile calculated by assuming that the energy in the laser pulse has a Gaussian distribution. The arrow shows that the energy density goes from low to high as one moves from the edge to the center of the laser irradiation profile on the array. The diameter of the laser spot on the array is .

Image of FIG. 4.
FIG. 4.

The SEM images of the periodic monolayer prismatic gold nanoparticle arrays at exposed regions within the laser-pulse profile (i.e., at different laser power densities) after irradiation with 800 nm femtosencond laser. From the Gaussian laser energy distribution profile, the calculated laser densities are (a) 2.1, (b) 3.0, (c) 4.5, (d) 5.0, (e) 5.6, and (f) .

Image of FIG. 5.
FIG. 5.

(Color online) Microabsorption spectra of a periodic monolayer array of prismatic gold nanoparticles after irradiation with 700 nm femtosecond laser at different intensities. The numbers in the plot correspond to different power densities of the examined region on the substrate within the laser profile calculated by assuming that the energy in the laser pulse has a Gaussian distribution. The arrow shows that the energy density goes from low to high as one moves from the edge to the center of the laser irradiation profile on the array. The diameter of the laser spot on the array is .

Image of FIG. 6.
FIG. 6.

The SEM images of the periodic monolayer prismatic gold nanoparticle arrays at exposed regions within the laser-pulse profile (i.e., at different laser power densities) after irradiation with 700 nm femtosecond laser. From the Gaussian laser energy distribution profile, the calculated laser densities are (a) 1.8, (b) 2.8, (c) 3.1, (d) 4.5, (e) 5.6, and (f) .

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/content/aip/journal/jap/98/11/10.1063/1.2132515
2005-12-01
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photothermal reshaping of prismatic Au nanoparticles in periodic monolayer arrays by femtosecond laser pulses
http://aip.metastore.ingenta.com/content/aip/journal/jap/98/11/10.1063/1.2132515
10.1063/1.2132515
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